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[PATCH kernel-4.19 1/2] SUNRPC: If there is no reply expected, bail early from call_decode
by Yang Yingliang 30 Apr '21

30 Apr '21

From: Trond Myklebust <trond.myklebust(a)hammerspace.com> mainline inclusion from mainline-4.20-rc1 commit 9ee94d3ed6a4f75dbf0a022927021a42a24dbdf8 category: bugfix bugzilla: 51820 CVE: NA ------------------------------------------------- Signed-off-by: Trond Myklebust <trond.myklebust(a)hammerspace.com> Signed-off-by: Huang Guobin <huangguobin4(a)huawei.com> Reviewed-by: Yue Haibing <yuehaibing(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- net/sunrpc/clnt.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index ccd5d5735be16..abdae040d229e 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -2264,6 +2264,11 @@ call_decode(struct rpc_task *task) dprint_status(task); + if (!decode) { + task->tk_action = rpc_exit_task; + return; + } + if (task->tk_flags & RPC_CALL_MAJORSEEN) { if (clnt->cl_chatty) { printk(KERN_NOTICE "%s: server %s OK\n", @@ -2301,13 +2306,11 @@ call_decode(struct rpc_task *task) goto out_retry; return; } - task->tk_action = rpc_exit_task; - if (decode) { - task->tk_status = rpcauth_unwrap_resp(task, decode, req, p, - task->tk_msg.rpc_resp); - } + task->tk_status = rpcauth_unwrap_resp(task, decode, req, p, + task->tk_msg.rpc_resp); + dprintk("RPC: %5u call_decode result %d\n", task->tk_pid, task->tk_status); return; -- 2.25.1

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[PATCH kernel-4.19 00/59] backport linux-4.19.189
by Yang Yingliang 30 Apr '21

30 Apr '21

Alexander Aring (7): net: ieee802154: stop dump llsec keys for monitors net: ieee802154: stop dump llsec devs for monitors net: ieee802154: forbid monitor for add llsec dev net: ieee802154: stop dump llsec devkeys for monitors net: ieee802154: forbid monitor for add llsec devkey net: ieee802154: stop dump llsec seclevels for monitors net: ieee802154: forbid monitor for add llsec seclevel Alexander Shiyan (1): ASoC: fsl_esai: Fix TDM slot setup for I2S mode Ali Saidi (1): locking/qrwlock: Fix ordering in queued_write_lock_slowpath() Andy Shevchenko (1): dmaengine: dw: Make it dependent to HAS_IOMEM Arnd Bergmann (2): ARM: keystone: fix integer overflow warning Input: i8042 - fix Pegatron C15B ID entry Caleb Connolly (1): Input: s6sy761 - fix coordinate read bit shift Christophe JAILLET (1): net: davicom: Fix regulator not turned off on failed probe Eric Dumazet (1): netfilter: nft_limit: avoid possible divide error in nft_limit_init Fabian Vogt (1): Input: nspire-keypad - enable interrupts only when opened Fredrik Strupe (1): ARM: 9071/1: uprobes: Don't hook on thumb instructions Greg Kroah-Hartman (1): Linux 4.19.189 Guenter Roeck (1): pcnet32: Use pci_resource_len to validate PCI resource Hristo Venev (2): net: sit: Unregister catch-all devices net: ip6_tunnel: Unregister catch-all devices Jaegeuk Kim (1): dm verity fec: fix misaligned RS roots IO Jason Xing (1): i40e: fix the panic when running bpf in xdpdrv mode Jia-Ju Bai (1): HID: alps: fix error return code in alps_input_configured() Jiapeng Zhong (1): HID: wacom: Assign boolean values to a bool variable Johan Hovold (1): net: hso: fix NULL-deref on disconnect regression John Paul Adrian Glaubitz (1): ia64: tools: remove duplicate definition of ia64_mf() on ia64 Jolly Shah (1): scsi: libsas: Reset num_scatter if libata marks qc as NODATA Kan Liang (1): perf/x86/intel/uncore: Remove uncore extra PCI dev HSWEP_PCI_PCU_3 Lijun Pan (3): ibmvnic: avoid calling napi_disable() twice ibmvnic: remove duplicate napi_schedule call in do_reset function ibmvnic: remove duplicate napi_schedule call in open function Linus Torvalds (2): readdir: make sure to verify directory entry for legacy interfaces too gup: document and work around "COW can break either way" issue Martin Wilck (1): scsi: scsi_transport_srp: Don't block target in SRP_PORT_LOST state Matti Vaittinen (1): gpio: sysfs: Obey valid_mask Michael Brown (1): xen-netback: Check for hotplug-status existence before watching Mike Galbraith (1): x86/crash: Fix crash_setup_memmap_entries() out-of-bounds access Nathan Chancellor (1): arm64: alternatives: Move length validation in alternative_{insn, endif} Oliver Neukum (1): USB: CDC-ACM: fix poison/unpoison imbalance Pablo Neira Ayuso (1): netfilter: conntrack: do not print icmpv6 as unknown via /proc Pali Rohár (1): net: phy: marvell: fix detection of PHY on Topaz switches Peter Collingbourne (1): arm64: fix inline asm in load_unaligned_zeropad() Phillip Potter (1): net: geneve: check skb is large enough for IPv4/IPv6 header Ping Cheng (1): HID: wacom: set EV_KEY and EV_ABS only for non-HID_GENERIC type of devices Randy Dunlap (1): ia64: fix discontig.c section mismatches Rob Clark (1): drm/msm: Fix a5xx/a6xx timestamps Russell King (1): ARM: footbridge: fix PCI interrupt mapping Seevalamuthu Mariappan (1): mac80211: clear sta->fast_rx when STA removed from 4-addr VLAN Shou-Chieh Hsu (1): HID: google: add don USB id Tetsuo Handa (1): lockdep: Add a missing initialization hint to the "INFO: Trying to register non-static key" message Tong Zhu (1): neighbour: Disregard DEAD dst in neigh_update Tony Lindgren (3): ARM: dts: Drop duplicate sha2md5_fck to fix clk_disable race ARM: dts: Fix moving mmc devices with aliases for omap4 & 5 ARM: dts: Fix swapped mmc order for omap3 Vasily Gorbik (1): s390/entry: save the caller of psw_idle Wan Jiabing (1): cavium/liquidio: Fix duplicate argument Wang Qing (1): arc: kernel: Return -EFAULT if copy_to_user() fails Yuanyuan Zhong (1): pinctrl: lewisburg: Update number of pins in community Makefile | 2 +- arch/arc/kernel/signal.c | 4 +- arch/arm/boot/dts/omap3.dtsi | 3 + arch/arm/boot/dts/omap4.dtsi | 5 ++ arch/arm/boot/dts/omap44xx-clocks.dtsi | 8 --- arch/arm/boot/dts/omap5.dtsi | 5 ++ arch/arm/mach-footbridge/cats-pci.c | 4 +- arch/arm/mach-footbridge/ebsa285-pci.c | 4 +- arch/arm/mach-footbridge/netwinder-pci.c | 2 +- arch/arm/mach-footbridge/personal-pci.c | 5 +- arch/arm/mach-keystone/keystone.c | 4 +- arch/arm/probes/uprobes/core.c | 4 +- arch/arm64/include/asm/alternative.h | 8 +-- arch/arm64/include/asm/word-at-a-time.h | 10 +-- arch/ia64/mm/discontig.c | 6 +- arch/s390/kernel/entry.S | 1 + arch/x86/events/intel/uncore_snbep.c | 61 ++++++++----------- arch/x86/kernel/crash.c | 2 +- drivers/dma/dw/Kconfig | 2 + drivers/gpio/gpiolib-sysfs.c | 8 +++ drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 4 +- drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 4 +- drivers/hid/hid-alps.c | 1 + drivers/hid/hid-google-hammer.c | 2 + drivers/hid/hid-ids.h | 1 + drivers/hid/wacom_wac.c | 8 +-- drivers/input/keyboard/nspire-keypad.c | 56 +++++++++-------- drivers/input/serio/i8042-x86ia64io.h | 1 + drivers/input/touchscreen/s6sy761.c | 4 +- drivers/md/dm-verity-fec.c | 11 +++- drivers/md/dm-verity-fec.h | 1 + drivers/net/dsa/mv88e6xxx/chip.c | 30 ++++----- drivers/net/ethernet/amd/pcnet32.c | 5 +- .../ethernet/cavium/liquidio/cn66xx_regs.h | 2 +- drivers/net/ethernet/davicom/dm9000.c | 6 +- drivers/net/ethernet/ibm/ibmvnic.c | 14 +---- drivers/net/ethernet/intel/i40e/i40e_main.c | 6 ++ drivers/net/geneve.c | 6 ++ drivers/net/phy/marvell.c | 28 ++++++++- drivers/net/usb/hso.c | 2 +- drivers/net/xen-netback/xenbus.c | 12 ++-- drivers/pinctrl/intel/pinctrl-lewisburg.c | 6 +- drivers/scsi/libsas/sas_ata.c | 9 ++- drivers/scsi/scsi_transport_srp.c | 2 +- drivers/usb/class/cdc-acm.c | 3 +- fs/readdir.c | 6 ++ include/linux/marvell_phy.h | 5 +- kernel/locking/lockdep.c | 3 +- kernel/locking/qrwlock.c | 7 ++- mm/gup.c | 44 +++++++++++-- mm/huge_memory.c | 7 +-- net/core/neighbour.c | 2 +- net/ieee802154/nl802154.c | 29 +++++++++ net/ipv6/ip6_tunnel.c | 10 +++ net/ipv6/sit.c | 4 +- net/mac80211/cfg.c | 4 +- net/netfilter/nf_conntrack_standalone.c | 1 + net/netfilter/nft_limit.c | 4 +- sound/soc/fsl/fsl_esai.c | 8 ++- tools/arch/ia64/include/asm/barrier.h | 3 - 60 files changed, 319 insertions(+), 190 deletions(-) -- 2.25.1

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【Meeting Notice】openEuler kernel 技术分享第四期 & 双周例会 Time: 2021-04-30 14:00-18:00
by chengjian (D) 29 Apr '21

29 Apr '21

-------- Forwarded Message -------- Subject: 【Meeting Notice】openEuler kernel 技术分享第四期 & 双周例会 Time: 2021-04-30 14:00-18:00 Date: Thu, 29 Apr 2021 17:52:38 +0800 From: Meeting Book <uMeeting(a)huawei.com> To: cj.chengjian(a)huawei.com Topic openEuler kernel 技术分享第四期 & 双周例会 Time 2021-04-30 14:00-18:00((UTC+08:00)Beijing) Join Conference Join (External) >> <https://welink-meeting.zoom.us/j/795275194> Meeting ID 795 275 194 Convener 唐嘉远 Agenda 14:00 ~ 15:30 openEuler kernel 技术分享第四期(openEuler内核的PCI子系统介绍-汪雄峰) Tips: Dial the access number to join conference <http://app.huawei.com/eshare/voiceMeetings> 注：仅支持部分国家和地区。( Only some countries and regions are supported.) 如果加入会议提示“会议已结束或会议号不存在”，请在官网下载最新版本入会。立即下载 <https://zoom.us/download> If a message is displayed, indicating that the meeting has ended or the meeting ID does not exist, download the latest meeting client and try again.Download <https://zoom.us/download>

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【Meeting Notice】openEuler kernel 技术分享第四期 & 双周例会 Time: 2021-04-30 14:00-18:00
by Meeting Book 29 Apr '21

29 Apr '21

1 0

[PATCH kernel-4.19 01/20] xprtrdma: fix incorrect header size calculations
by Yang Yingliang 29 Apr '21

29 Apr '21

From: Colin Ian King <colin.king(a)canonical.com> mainline inclusion from mainline-5.8-rc6 commit 912288442cb2f431bf3c8cb097a5de83bc6dbac1 category: bugfix bugzilla: 51800 CVE: NA --------------------------- Currently the header size calculations are using an assignment operator instead of a += operator when accumulating the header size leading to incorrect sizes. Fix this by using the correct operator. Addresses-Coverity: ("Unused value") Fixes: 302d3deb2068 ("xprtrdma: Prevent inline overflow") Signed-off-by: Colin Ian King <colin.king(a)canonical.com> Reviewed-by: Chuck Lever <chuck.lever(a)oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker(a)Netapp.com> Signed-off-by: Liu Jian <liujian56(a)huawei.com> Conflicts: net/sunrpc/xprtrdma/rpc_rdma.c Reviewed-by: Yue Haibing <yuehaibing(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- net/sunrpc/xprtrdma/rpc_rdma.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c index f2eaf264726be..10805313aa960 100644 --- a/net/sunrpc/xprtrdma/rpc_rdma.c +++ b/net/sunrpc/xprtrdma/rpc_rdma.c @@ -72,7 +72,7 @@ static unsigned int rpcrdma_max_call_header_size(unsigned int maxsegs) /* Maximum Read list size */ maxsegs += 2; /* segment for head and tail buffers */ - size = maxsegs * rpcrdma_readchunk_maxsz * sizeof(__be32); + size += maxsegs * rpcrdma_readchunk_maxsz * sizeof(__be32); /* Minimal Read chunk size */ size += sizeof(__be32); /* segment count */ @@ -98,7 +98,7 @@ static unsigned int rpcrdma_max_reply_header_size(unsigned int maxsegs) /* Maximum Write list size */ maxsegs += 2; /* segment for head and tail buffers */ - size = sizeof(__be32); /* segment count */ + size += sizeof(__be32); /* segment count */ size += maxsegs * rpcrdma_segment_maxsz * sizeof(__be32); size += sizeof(__be32); /* list discriminator */ -- 2.25.1

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【重要】openEuler src-openeuler/kernel 仓库已完成瘦身（涉及 force push）
by chengjian (D) 27 Apr '21

27 Apr '21

一句话总结：为了解决仓库太大的问题，src-openeuler/kernel 仓库于今天 2021/04/27 下午 17:30 左右进行了*force push* 因此大家之前 fork 和 clone 的私人仓库建议*强制同步*。 1. 个人 fork 的仓库，可以使用 gitee 的*一键同步功能*，强制拉取。 2. 个人本地 clone 的仓库，建议 *删除掉仓库后重新下载*（如果 clone 的是自己 fork 的仓库，待 1 完成后再进行 2 操作）。 # 1 问题背景 ------- 仓库地址：https://gitee.com/src-openeuler/kernel src-openEuler/kernel 仓库通过 PR 方式来合入补丁。但是 gitee 限制私人仓库不能超过 1G，超过 1G 之后仓库将被封禁，停止访问，禁止提交。个人 fork 的 src-openEuler/kernel 私人仓库无法正常 push，因此无法向 openEuler 主仓提交 PR。 # 2 问题分析 ------- 检索 git/objects 信息发现：历史提交中有一些内核源代码 TAR 包，该文件大小接近 1G，导致仓库较大涉及的历史提交如下：即使大文件已经在历史提交中被删除，但是仍然存在于 git 历史记录中，方便查找历史提交和回滚版本。 # 3 问题解决 ------- 通过 git filter-branch 强制删除了历史上的大文件的提交，并重建了 commit 记录。最后仓库进行了强制 push 本次瘦身清理的历史文件包括： 1. linux-4.19.90.tar.gz 内核源代码 TAR 包 2. patches.tar.bz2 patch 文件 TAR 包此次清理的历史都是早期仓库创建初期的一些提交，已在后面提交中被清理。现在当前仓库使用 PR 方式合入，经过 CI 门禁和 Committer 检视，不会再发生此类问题。清理前，仓库大小 1.1G 清理后，仓库大小 3.1M # 4 影响以及建议操作 ------- 由于仓库进行了强制 push，因此大家之前 fork 和 clone 的私人仓库建议强制同步。 1. fork 的仓库，可以使用 gitee 的一键同步功能，强制拉取。点击红色框中的刷新按钮即可。 2. 自己本地 clone 的仓库，建议删除仓库后重新下载。谢谢 ---- 成坚

1 0

[PATCH openEuler-1.0-LTS 1/2] perf/x86: Make perf callchains work without CONFIG_FRAME_POINTER
by Yang Yingliang 26 Apr '21

26 Apr '21

From: Kairui Song <kasong(a)redhat.com> mainline inclusion from mainline-5.2-rc1 commit d15d356887e7 category: bugfix bugzilla: 35738 CVE: NA ------------------------------------------------- Currently perf callchain doesn't work well with ORC unwinder when sampling from trace point. We'll get useless in kernel callchain like this: perf 6429 [000] 22.498450: kmem:mm_page_alloc: page=0x176a17 pfn=1534487 order=0 migratetype=0 gfp_flags=GFP_KERNEL ffffffffbe23e32e __alloc_pages_nodemask+0x22e (/lib/modules/5.1.0-rc3+/build/vmlinux) 7efdf7f7d3e8 __poll+0x18 (/usr/lib64/libc-2.28.so) 5651468729c1 [unknown] (/usr/bin/perf) 5651467ee82a main+0x69a (/usr/bin/perf) 7efdf7eaf413 __libc_start_main+0xf3 (/usr/lib64/libc-2.28.so) 5541f689495641d7 [unknown] ([unknown]) The root cause is that, for trace point events, it doesn't provide a real snapshot of the hardware registers. Instead perf tries to get required caller's registers and compose a fake register snapshot which suppose to contain enough information for start a unwinding. However without CONFIG_FRAME_POINTER, if failed to get caller's BP as the frame pointer, so current frame pointer is returned instead. We get a invalid register combination which confuse the unwinder, and end the stacktrace early. So in such case just don't try dump BP, and let the unwinder start directly when the register is not a real snapshot. Use SP as the skip mark, unwinder will skip all the frames until it meet the frame of the trace point caller. Tested with frame pointer unwinder and ORC unwinder, this makes perf callchain get the full kernel space stacktrace again like this: perf 6503 [000] 1567.570191: kmem:mm_page_alloc: page=0x16c904 pfn=1493252 order=0 migratetype=0 gfp_flags=GFP_KERNEL ffffffffb523e2ae __alloc_pages_nodemask+0x22e (/lib/modules/5.1.0-rc3+/build/vmlinux) ffffffffb52383bd __get_free_pages+0xd (/lib/modules/5.1.0-rc3+/build/vmlinux) ffffffffb52fd28a __pollwait+0x8a (/lib/modules/5.1.0-rc3+/build/vmlinux) ffffffffb521426f perf_poll+0x2f (/lib/modules/5.1.0-rc3+/build/vmlinux) ffffffffb52fe3e2 do_sys_poll+0x252 (/lib/modules/5.1.0-rc3+/build/vmlinux) ffffffffb52ff027 __x64_sys_poll+0x37 (/lib/modules/5.1.0-rc3+/build/vmlinux) ffffffffb500418b do_syscall_64+0x5b (/lib/modules/5.1.0-rc3+/build/vmlinux) ffffffffb5a0008c entry_SYSCALL_64_after_hwframe+0x44 (/lib/modules/5.1.0-rc3+/build/vmlinux) 7f71e92d03e8 __poll+0x18 (/usr/lib64/libc-2.28.so) 55a22960d9c1 [unknown] (/usr/bin/perf) 55a22958982a main+0x69a (/usr/bin/perf) 7f71e9202413 __libc_start_main+0xf3 (/usr/lib64/libc-2.28.so) 5541f689495641d7 [unknown] ([unknown]) Co-developed-by: Josh Poimboeuf <jpoimboe(a)redhat.com> Signed-off-by: Kairui Song <kasong(a)redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> Cc: Alexander Shishkin <alexander.shishkin(a)linux.intel.com> Cc: Alexei Starovoitov <alexei.starovoitov(a)gmail.com> Cc: Arnaldo Carvalho de Melo <acme(a)kernel.org> Cc: Borislav Petkov <bp(a)alien8.de> Cc: Dave Young <dyoung(a)redhat.com> Cc: Jiri Olsa <jolsa(a)redhat.com> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: Namhyung Kim <namhyung(a)kernel.org> Cc: Peter Zijlstra <peterz(a)infradead.org> Cc: Thomas Gleixner <tglx(a)linutronix.de> Link: https://lkml.kernel.org/r/20190422162652.15483-1-kasong@redhat.com Signed-off-by: Ingo Molnar <mingo(a)kernel.org> Signed-off-by: Wei Li <liwei391(a)huawei.com> Reviewed-by: Jian Cheng <cj.chengjian(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- arch/x86/events/core.c | 21 +++++++++++++++++---- arch/x86/include/asm/perf_event.h | 7 +------ arch/x86/include/asm/stacktrace.h | 13 ------------- include/linux/perf_event.h | 14 ++++++++++---- 4 files changed, 28 insertions(+), 27 deletions(-) diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c index 6cc29469c1dff..40fb808e83965 100644 --- a/arch/x86/events/core.c +++ b/arch/x86/events/core.c @@ -2336,6 +2336,15 @@ void arch_perf_update_userpage(struct perf_event *event, cyc2ns_read_end(); } +/* + * Determine whether the regs were taken from an irq/exception handler rather + * than from perf_arch_fetch_caller_regs(). + */ +static bool perf_hw_regs(struct pt_regs *regs) +{ + return regs->flags & X86_EFLAGS_FIXED; +} + void perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs) { @@ -2347,11 +2356,15 @@ perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *re return; } - if (perf_callchain_store(entry, regs->ip)) - return; + if (perf_hw_regs(regs)) { + if (perf_callchain_store(entry, regs->ip)) + return; + unwind_start(&state, current, regs, NULL); + } else { + unwind_start(&state, current, NULL, (void *)regs->sp); + } - for (unwind_start(&state, current, regs, NULL); !unwind_done(&state); - unwind_next_frame(&state)) { + for (; !unwind_done(&state); unwind_next_frame(&state)) { addr = unwind_get_return_address(&state); if (!addr || perf_callchain_store(entry, addr)) return; diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h index f6c4915a863e0..620c3e3564bef 100644 --- a/arch/x86/include/asm/perf_event.h +++ b/arch/x86/include/asm/perf_event.h @@ -264,14 +264,9 @@ extern unsigned long perf_misc_flags(struct pt_regs *regs); */ #define perf_arch_fetch_caller_regs(regs, __ip) { \ (regs)->ip = (__ip); \ - (regs)->bp = caller_frame_pointer(); \ + (regs)->sp = (unsigned long)__builtin_frame_address(0); \ (regs)->cs = __KERNEL_CS; \ regs->flags = 0; \ - asm volatile( \ - _ASM_MOV "%%"_ASM_SP ", %0\n" \ - : "=m" ((regs)->sp) \ - :: "memory" \ - ); \ } struct perf_guest_switch_msr { diff --git a/arch/x86/include/asm/stacktrace.h b/arch/x86/include/asm/stacktrace.h index f335aad404a47..beef7ad9e43a4 100644 --- a/arch/x86/include/asm/stacktrace.h +++ b/arch/x86/include/asm/stacktrace.h @@ -98,19 +98,6 @@ struct stack_frame_ia32 { u32 return_address; }; -static inline unsigned long caller_frame_pointer(void) -{ - struct stack_frame *frame; - - frame = __builtin_frame_address(0); - -#ifdef CONFIG_FRAME_POINTER - frame = frame->next_frame; -#endif - - return (unsigned long)frame; -} - void show_opcodes(struct pt_regs *regs, const char *loglvl); void show_ip(struct pt_regs *regs, const char *loglvl); #endif /* _ASM_X86_STACKTRACE_H */ diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index d8b4d31acd18e..cf3da70056f72 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -1050,12 +1050,18 @@ static inline void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned lo #endif /* - * Take a snapshot of the regs. Skip ip and frame pointer to - * the nth caller. We only need a few of the regs: + * When generating a perf sample in-line, instead of from an interrupt / + * exception, we lack a pt_regs. This is typically used from software events + * like: SW_CONTEXT_SWITCHES, SW_MIGRATIONS and the tie-in with tracepoints. + * + * We typically don't need a full set, but (for x86) do require: * - ip for PERF_SAMPLE_IP * - cs for user_mode() tests - * - bp for callchains - * - eflags, for future purposes, just in case + * - sp for PERF_SAMPLE_CALLCHAIN + * - eflags for MISC bits and CALLCHAIN (see: perf_hw_regs()) + * + * NOTE: assumes @regs is otherwise already 0 filled; this is important for + * things like PERF_SAMPLE_REGS_INTR. */ static inline void perf_fetch_caller_regs(struct pt_regs *regs) { -- 2.25.1

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[PATCH openEuler-1.0-LTS] kernel/cputime: do not update cputime when cpu offline
by Cheng Jian 26 Apr '21

26 Apr '21

From: Xie XiuQi <xiexiuqi(a)huawei.com> hulk inclusion category: bugfix bugzilla: https://bugzilla.openeuler.org/show_bug.cgi?id=37 CVE: NA If we enable 'use_sched_idle_time' at commend line, when possile cpus > online cpus, we get the uncorrected idle time. Return the pervious sum_idle_time to avoid this issue. Signed-off-by: Xie XiuQi <xiexiuqi(a)huawei.com> Tested-by: Yu Xiangyang <yuxiangyang4(a)huawei.com> Signed-off-by: Cheng Jian <cj.chengjian(a)huawei.com> --- kernel/sched/cputime.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c index 159e4c467773..8dd27c1fbb29 100644 --- a/kernel/sched/cputime.c +++ b/kernel/sched/cputime.c @@ -649,6 +649,10 @@ unsigned long long sched_get_idle_time(int cpu) struct rq_cputime *rt = &per_cpu(rq_cputimes, cpu); u64 hi = 0, si = 0; + /* Do not update cpu time when cpu offline */ + if (!cpu_online(cpu)) + return rt->sum_idle_time; + #ifdef CONFIG_IRQ_TIME_ACCOUNTING if (sched_clock_irqtime) { hi = kcpustat_cpu(cpu).cpustat[CPUTIME_IRQ_IDLE]; -- 2.25.1

1 0

[PATCH kernel-4.19] bcache: Rewrite patch to delay to invalidate cache data
by Yang Yingliang 26 Apr '21

26 Apr '21

From: Li Ruilin <liruilin4(a)huawei.com> euleros inclusion category: feature bugzilla: https://bugzilla.openeuler.org/show_bug.cgi?id=26 CVE: NA ------------------------------ The recently pushd bugfix patch "Delay to invalidate cache data in writearound write" has a stupid copy&paste bug, which causes bypassed write request will never invalidate data in cache device, causing a data corruption. This patch fixes this corruption. This patch also ensures that the writeback lock is released after data insert. Fixes: 5239e24e76ac ("bcache: Delay to invalidate cache data in writearound write") Signed-off-by: Li Ruilin <liruilin4(a)huawei.com> Signed-off-by: Song Chao <chao.song(a)huawei.com> Reviewed-by: Peng Junyi <pengjunyi1(a)huawei.com> Acked-by: Xie XiuQi <xiexiuqi(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- drivers/md/bcache/request.c | 14 ++++++++++---- drivers/md/bcache/request.h | 12 ++++++++++++ 2 files changed, 22 insertions(+), 4 deletions(-) diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c index 18c8e5baa0116..2f3ecd8fc5801 100644 --- a/drivers/md/bcache/request.c +++ b/drivers/md/bcache/request.c @@ -734,6 +734,7 @@ struct search *search_alloc(struct bio *bio, s->read_dirty_data = 0; s->start_time = jiffies; s->prefetch = prefetch; + s->write_inval_data_putoff = false; s->iop.c = d->c; s->iop.bio = NULL; @@ -755,6 +756,10 @@ static void cached_dev_bio_complete(struct closure *cl) struct search *s = container_of(cl, struct search, cl); struct cached_dev *dc = container_of(s->d, struct cached_dev, disk); + /* eusure this lock is released after data_insert */ + if (s->write_inval_data_putoff) + up_read_non_owner(&dc->writeback_lock); + cached_dev_put(dc); search_free(cl); } @@ -993,10 +998,10 @@ static void cached_dev_write_complete(struct closure *cl) struct search *s = container_of(cl, struct search, cl); struct cached_dev *dc = container_of(s->d, struct cached_dev, disk); - if (!s->iop.bypass) + if (s->write_inval_data_putoff) closure_call(&s->iop.cl, bch_data_insert, NULL, cl); - - up_read_non_owner(&dc->writeback_lock); + else + up_read_non_owner(&dc->writeback_lock); continue_at(cl, cached_dev_bio_complete, NULL); } @@ -1048,6 +1053,7 @@ static void cached_dev_write(struct cached_dev *dc, struct search *s) bio->bi_end_io = backing_request_endio; closure_bio_submit(s->iop.c, bio, cl); + s->write_inval_data_putoff = true; } else if (s->iop.writeback) { bch_writeback_add(dc); s->iop.bio = bio; @@ -1080,7 +1086,7 @@ static void cached_dev_write(struct cached_dev *dc, struct search *s) } insert_data: - if (!s->iop.bypass) + if (!s->write_inval_data_putoff) closure_call(&s->iop.cl, bch_data_insert, NULL, cl); continue_at(cl, cached_dev_write_complete, NULL); } diff --git a/drivers/md/bcache/request.h b/drivers/md/bcache/request.h index 6366b88619745..7682630db73f6 100644 --- a/drivers/md/bcache/request.h +++ b/drivers/md/bcache/request.h @@ -61,6 +61,18 @@ struct search { unsigned long start_time; /* for prefetch, we do not need copy data to bio */ bool prefetch; + /* + * The function bch_data_insert() is invoked asynchronously as the bio + * subbmited to backend block device, therefore there may be a read + * request subbmited after the bch_data_insert() done and ended before + * the backend bio is end. This read request will read data from the + * backend block device, and insert dirty data to cache device. However + * by writearound cache mode, bcache will not invalidate data again, + * so that read request after will read dirty data from the cache, + * causing a data corruption. + * So that we should put off this invalidation. This switch is for + */ + bool write_inval_data_putoff; struct list_head list_node; wait_queue_head_t wqh; struct acache_info smp; -- 2.25.1

1 0

[PATCH kernel-4.19 1/3] share_pool: Fix warning missing braces around initializer
by Yang Yingliang 26 Apr '21

26 Apr '21

From: Tang Yizhou <tangyizhou(a)huawei.com> ascend inclusion category: bugfix bugzilla: 51777 CVE: NA ------------------------------------------------- Fix warnings: missing braces around initializer Signed-off-by: Tang Yizhou <tangyizhou(a)huawei.com> Reviewed-by: Ding Tianhong <dingtianhong(a)huawei.com> Reviewed-by: Kefeng Wang <wangkefeng.wang(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- mm/share_pool.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/mm/share_pool.c b/mm/share_pool.c index ccf4265287c19..5e0f95cb2e7e3 100644 --- a/mm/share_pool.c +++ b/mm/share_pool.c @@ -89,7 +89,7 @@ static DEFINE_IDR(sp_stat_idr); static DECLARE_RWSEM(sp_stat_sem); /* for kthread buff_module_guard_work */ -static struct sp_proc_stat kthread_stat = {0}; +static struct sp_proc_stat kthread_stat; /* The caller must hold sp_stat_sem */ static struct sp_proc_stat *sp_get_proc_stat_locked(int tgid) @@ -203,7 +203,7 @@ struct sp_spa_stat { unsigned long dvpp_va_size; }; -static struct sp_spa_stat spa_stat = {0}; +static struct sp_spa_stat spa_stat; /* statistics of all sp group born from sp_alloc and k2u(spg) */ struct sp_spg_stat { @@ -211,7 +211,7 @@ struct sp_spg_stat { atomic64_t spa_total_size; }; -static struct sp_spg_stat spg_stat = {0}; +static struct sp_spg_stat spg_stat; /*** Global share pool VA allocator ***/ -- 2.25.1

1 2

[PATCH kernel-4.19 4/7] ext4: drop legacy pre-1970 encoding workaround
by Yang Yingliang 26 Apr '21

26 Apr '21

From: Theodore Ts'o <tytso(a)mit.edu> mainline inclusion from mainline-5.4-rc1 commit cd2d99229dc96219547e6349841e1aad851c6acc category: bugfix bugzilla: 50526 CVE: NA --------------------------- Originally, support for expanded timestamps had a bug in that pre-1970 times were erroneously encoded as being in the the 24th century. This was fixed in commit a4dad1ae24f8 ("ext4: Fix handling of extended tv_sec") which landed in 4.4. Starting with 4.4, pre-1970 timestamps were correctly encoded, but for backwards compatibility those incorrectly encoded timestamps were mapped back to the pre-1970 dates. Given that backwards compatibility workaround has been around for 4 years, and given that running e2fsck from e2fsprogs 1.43.2 and later will offer to fix these timestamps (which has been released for 3 years), it's past time to drop the legacy workaround from the kernel. Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> Signed-off-by: Yu Kuai <yukuai3(a)huawei.com> Reviewed-by: zhangyi (F) <yi.zhang(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- fs/ext4/ext4.h | 15 +-------------- 1 file changed, 1 insertion(+), 14 deletions(-) diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 2a63c69bd19e2..816d6a83d14be 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -835,21 +835,8 @@ static inline __le32 ext4_encode_extra_time(struct timespec64 *time) static inline void ext4_decode_extra_time(struct timespec64 *time, __le32 extra) { - if (unlikely(extra & cpu_to_le32(EXT4_EPOCH_MASK))) { - -#if 1 - /* Handle legacy encoding of pre-1970 dates with epoch - * bits 1,1. (This backwards compatibility may be removed - * at the discretion of the ext4 developers.) - */ - u64 extra_bits = le32_to_cpu(extra) & EXT4_EPOCH_MASK; - if (extra_bits == 3 && ((time->tv_sec) & 0x80000000) != 0) - extra_bits = 0; - time->tv_sec += extra_bits << 32; -#else + if (unlikely(extra & cpu_to_le32(EXT4_EPOCH_MASK))) time->tv_sec += (u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK) << 32; -#endif - } time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> EXT4_EPOCH_BITS; } -- 2.25.1

1 0

[PATCH kernel-4.19 2/7] fuse: fix bad inode
by Yang Yingliang 26 Apr '21

26 Apr '21

From: Miklos Szeredi <mszeredi(a)redhat.com> mainline inclusion from mainline-v5.11-rc1 commit 5d069dbe8aaf2a197142558b6fb2978189ba3454 category: bugfix bugzilla: NA CVE: CVE-2020-36322 -------------------------------- Jan Kara's analysis of the syzbot report (edited): The reproducer opens a directory on FUSE filesystem, it then attaches dnotify mark to the open directory. After that a fuse_do_getattr() call finds that attributes returned by the server are inconsistent, and calls make_bad_inode() which, among other things does: inode->i_mode = S_IFREG; This then confuses dnotify which doesn't tear down its structures properly and eventually crashes. Avoid calling make_bad_inode() on a live inode: switch to a private flag on the fuse inode. Also add the test to ops which the bad_inode_ops would have caught. This bug goes back to the initial merge of fuse in 2.6.14... Reported-by: syzbot+f427adf9324b92652ccc(a)syzkaller.appspotmail.com Signed-off-by: Miklos Szeredi <mszeredi(a)redhat.com> Tested-by: Jan Kara <jack(a)suse.cz> Cc: <stable(a)vger.kernel.org> Conflicts: fs/fuse/inode.c fs/fuse/file.c fs/fuse/xattr.c fs/fuse/dir.c fs/fuse/fuse_i.h [yyl: replace is_bad_inode() with fuse_is_bad(), readdir.c is not added in kernel-4.19] Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Reviewed-by: zhangyi (F) <yi.zhang(a)huawei.com> Reviewed-by: Xiu Jianfeng <xiujianfeng(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- fs/fuse/acl.c | 6 ++++++ fs/fuse/dir.c | 37 ++++++++++++++++++++++++++++++++----- fs/fuse/file.c | 21 ++++++++++++--------- fs/fuse/fuse_i.h | 12 ++++++++++++ fs/fuse/inode.c | 2 +- fs/fuse/xattr.c | 9 +++++++++ 6 files changed, 72 insertions(+), 15 deletions(-) diff --git a/fs/fuse/acl.c b/fs/fuse/acl.c index 5a48cee6d7d33..f529075a2ce87 100644 --- a/fs/fuse/acl.c +++ b/fs/fuse/acl.c @@ -19,6 +19,9 @@ struct posix_acl *fuse_get_acl(struct inode *inode, int type) void *value = NULL; struct posix_acl *acl; + if (fuse_is_bad(inode)) + return ERR_PTR(-EIO); + if (!fc->posix_acl || fc->no_getxattr) return NULL; @@ -53,6 +56,9 @@ int fuse_set_acl(struct inode *inode, struct posix_acl *acl, int type) const char *name; int ret; + if (fuse_is_bad(inode)) + return -EIO; + if (!fc->posix_acl || fc->no_setxattr) return -EOPNOTSUPP; diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 6244345a5745b..29d8aa4844ff2 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -187,7 +187,7 @@ static int fuse_dentry_revalidate(struct dentry *entry, unsigned int flags) int ret; inode = d_inode_rcu(entry); - if (inode && is_bad_inode(inode)) + if (inode && fuse_is_bad(inode)) goto invalid; else if (time_before64(fuse_dentry_time(entry), get_jiffies_64()) || (flags & LOOKUP_REVAL)) { @@ -364,6 +364,9 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry, bool outarg_valid = true; bool locked; + if (fuse_is_bad(dir)) + return ERR_PTR(-EIO); + locked = fuse_lock_inode(dir); err = fuse_lookup_name(dir->i_sb, get_node_id(dir), &entry->d_name, &outarg, &inode); @@ -504,6 +507,9 @@ static int fuse_atomic_open(struct inode *dir, struct dentry *entry, struct fuse_conn *fc = get_fuse_conn(dir); struct dentry *res = NULL; + if (fuse_is_bad(dir)) + return -EIO; + if (d_in_lookup(entry)) { res = fuse_lookup(dir, entry, 0); if (IS_ERR(res)) @@ -552,6 +558,9 @@ static int create_new_entry(struct fuse_conn *fc, struct fuse_args *args, int err; struct fuse_forget_link *forget; + if (fuse_is_bad(dir)) + return -EIO; + forget = fuse_alloc_forget(); if (!forget) return -ENOMEM; @@ -679,6 +688,9 @@ static int fuse_unlink(struct inode *dir, struct dentry *entry) struct fuse_conn *fc = get_fuse_conn(dir); FUSE_ARGS(args); + if (fuse_is_bad(dir)) + return -EIO; + args.in.h.opcode = FUSE_UNLINK; args.in.h.nodeid = get_node_id(dir); args.in.numargs = 1; @@ -715,6 +727,9 @@ static int fuse_rmdir(struct inode *dir, struct dentry *entry) struct fuse_conn *fc = get_fuse_conn(dir); FUSE_ARGS(args); + if (fuse_is_bad(dir)) + return -EIO; + args.in.h.opcode = FUSE_RMDIR; args.in.h.nodeid = get_node_id(dir); args.in.numargs = 1; @@ -793,6 +808,9 @@ static int fuse_rename2(struct inode *olddir, struct dentry *oldent, struct fuse_conn *fc = get_fuse_conn(olddir); int err; + if (fuse_is_bad(olddir)) + return -EIO; + if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE)) return -EINVAL; @@ -928,7 +946,7 @@ static int fuse_do_getattr(struct inode *inode, struct kstat *stat, if (!err) { if (fuse_invalid_attr(&outarg.attr) || (inode->i_mode ^ outarg.attr.mode) & S_IFMT) { - make_bad_inode(inode); + fuse_make_bad(inode); err = -EIO; } else { fuse_change_attributes(inode, &outarg.attr, @@ -1125,6 +1143,9 @@ static int fuse_permission(struct inode *inode, int mask) bool refreshed = false; int err = 0; + if (fuse_is_bad(inode)) + return -EIO; + if (!fuse_allow_current_process(fc)) return -EACCES; @@ -1262,7 +1283,7 @@ static int fuse_direntplus_link(struct file *file, dput(dentry); goto retry; } - if (is_bad_inode(inode)) { + if (fuse_is_bad(inode)) { dput(dentry); return -EIO; } @@ -1360,7 +1381,7 @@ static int fuse_readdir(struct file *file, struct dir_context *ctx) u64 attr_version = 0; bool locked; - if (is_bad_inode(inode)) + if (fuse_is_bad(inode)) return -EIO; req = fuse_get_req(fc, 1); @@ -1718,7 +1739,7 @@ int fuse_do_setattr(struct dentry *dentry, struct iattr *attr, if (fuse_invalid_attr(&outarg.attr) || (inode->i_mode ^ outarg.attr.mode) & S_IFMT) { - make_bad_inode(inode); + fuse_make_bad(inode); err = -EIO; goto error; } @@ -1774,6 +1795,9 @@ static int fuse_setattr(struct dentry *entry, struct iattr *attr) struct file *file = (attr->ia_valid & ATTR_FILE) ? attr->ia_file : NULL; int ret; + if (fuse_is_bad(inode)) + return -EIO; + if (!fuse_allow_current_process(get_fuse_conn(inode))) return -EACCES; @@ -1832,6 +1856,9 @@ static int fuse_getattr(const struct path *path, struct kstat *stat, struct inode *inode = d_inode(path->dentry); struct fuse_conn *fc = get_fuse_conn(inode); + if (fuse_is_bad(inode)) + return -EIO; + if (!fuse_allow_current_process(fc)) return -EACCES; diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 6a3d89672ff71..c1af038920dc5 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -207,6 +207,9 @@ int fuse_open_common(struct inode *inode, struct file *file, bool isdir) fc->atomic_o_trunc && fc->writeback_cache; + if (fuse_is_bad(inode)) + return -EIO; + err = generic_file_open(inode, file); if (err) return err; @@ -408,7 +411,7 @@ static int fuse_flush(struct file *file, fl_owner_t id) struct fuse_flush_in inarg; int err; - if (is_bad_inode(inode)) + if (fuse_is_bad(inode)) return -EIO; if (fc->no_flush) @@ -456,7 +459,7 @@ int fuse_fsync_common(struct file *file, loff_t start, loff_t end, struct fuse_fsync_in inarg; int err; - if (is_bad_inode(inode)) + if (fuse_is_bad(inode)) return -EIO; inode_lock(inode); @@ -771,7 +774,7 @@ static int fuse_readpage(struct file *file, struct page *page) int err; err = -EIO; - if (is_bad_inode(inode)) + if (fuse_is_bad(inode)) goto out; err = fuse_do_readpage(file, page); @@ -898,7 +901,7 @@ static int fuse_readpages(struct file *file, struct address_space *mapping, int nr_alloc = min_t(unsigned, nr_pages, FUSE_MAX_PAGES_PER_REQ); err = -EIO; - if (is_bad_inode(inode)) + if (fuse_is_bad(inode)) goto out; data.file = file; @@ -1128,7 +1131,7 @@ static ssize_t fuse_perform_write(struct kiocb *iocb, int err = 0; ssize_t res = 0; - if (is_bad_inode(inode)) + if (fuse_is_bad(inode)) return -EIO; if (inode->i_size < pos + iov_iter_count(ii)) @@ -1421,7 +1424,7 @@ static ssize_t __fuse_direct_read(struct fuse_io_priv *io, ssize_t res; struct inode *inode = file_inode(io->iocb->ki_filp); - if (is_bad_inode(inode)) + if (fuse_is_bad(inode)) return -EIO; res = fuse_direct_io(io, iter, ppos, 0); @@ -1443,7 +1446,7 @@ static ssize_t fuse_direct_write_iter(struct kiocb *iocb, struct iov_iter *from) struct fuse_io_priv io = FUSE_IO_PRIV_SYNC(iocb); ssize_t res; - if (is_bad_inode(inode)) + if (fuse_is_bad(inode)) return -EIO; /* Don't allow parallel writes to the same file */ @@ -1917,7 +1920,7 @@ static int fuse_writepages(struct address_space *mapping, int err; err = -EIO; - if (is_bad_inode(inode)) + if (fuse_is_bad(inode)) goto out; data.inode = inode; @@ -2702,7 +2705,7 @@ long fuse_ioctl_common(struct file *file, unsigned int cmd, if (!fuse_allow_current_process(fc)) return -EACCES; - if (is_bad_inode(inode)) + if (fuse_is_bad(inode)) return -EIO; return fuse_do_ioctl(file, cmd, arg, flags); diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index dbfc35efbefb6..3d88386047dfe 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -118,6 +118,8 @@ enum { FUSE_I_INIT_RDPLUS, /** An operation changing file size is in progress */ FUSE_I_SIZE_UNSTABLE, + /* Bad inode */ + FUSE_I_BAD, }; struct fuse_conn; @@ -700,6 +702,16 @@ static inline u64 get_node_id(struct inode *inode) return get_fuse_inode(inode)->nodeid; } +static inline void fuse_make_bad(struct inode *inode) +{ + set_bit(FUSE_I_BAD, &get_fuse_inode(inode)->state); +} + +static inline bool fuse_is_bad(struct inode *inode) +{ + return unlikely(test_bit(FUSE_I_BAD, &get_fuse_inode(inode)->state)); +} + /** Device operations */ extern const struct file_operations fuse_dev_operations; diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index cb018315ecaf5..821597c618843 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -317,7 +317,7 @@ struct inode *fuse_iget(struct super_block *sb, u64 nodeid, unlock_new_inode(inode); } else if ((inode->i_mode ^ attr->mode) & S_IFMT) { /* Inode has changed type, any I/O on the old should fail */ - make_bad_inode(inode); + fuse_make_bad(inode); iput(inode); goto retry; } diff --git a/fs/fuse/xattr.c b/fs/fuse/xattr.c index 433717640f78d..a4b65374bced4 100644 --- a/fs/fuse/xattr.c +++ b/fs/fuse/xattr.c @@ -113,6 +113,9 @@ ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size) struct fuse_getxattr_out outarg; ssize_t ret; + if (fuse_is_bad(inode)) + return -EIO; + if (!fuse_allow_current_process(fc)) return -EACCES; @@ -178,6 +181,9 @@ static int fuse_xattr_get(const struct xattr_handler *handler, struct dentry *dentry, struct inode *inode, const char *name, void *value, size_t size) { + if (fuse_is_bad(inode)) + return -EIO; + return fuse_getxattr(inode, name, value, size); } @@ -186,6 +192,9 @@ static int fuse_xattr_set(const struct xattr_handler *handler, const char *name, const void *value, size_t size, int flags) { + if (fuse_is_bad(inode)) + return -EIO; + if (!value) return fuse_removexattr(inode, name); -- 2.25.1

1 0

[PATCH openEuler-1.0-LTS 3/3] config: enable CONFIG_HW_RANDOM_HISI_V2 by default
by Yang Yingliang 26 Apr '21

26 Apr '21

From: Yu'an Wang <wangyuan46(a)huawei.com> driver inclusion category: Feature bugzilla: NA CVE: NA In this patch, we enable CONFIG_HW_RANDOM_HISI_V2 by default to support the True Random Number Generator V2 hardware Signed-off-by: Yu'an Wang <wangyuan46(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- arch/arm64/configs/hulk_defconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/configs/hulk_defconfig b/arch/arm64/configs/hulk_defconfig index 5ae11e9633375..8950fff02a43f 100644 --- a/arch/arm64/configs/hulk_defconfig +++ b/arch/arm64/configs/hulk_defconfig @@ -2928,6 +2928,7 @@ CONFIG_HW_RANDOM=y CONFIG_HW_RANDOM_TIMERIOMEM=m CONFIG_HW_RANDOM_VIRTIO=m CONFIG_HW_RANDOM_HISI=y +CONFIG_HW_RANDOM_HISI_V2=m CONFIG_HW_RANDOM_XGENE=y CONFIG_HW_RANDOM_CAVIUM=y # CONFIG_R3964 is not set -- 2.25.1

1 0

[PATCH openEuler-1.0-LTS 2/3] hwrng: add data_mode to support rand data with post process
by Yang Yingliang 26 Apr '21

26 Apr '21

From: Yu'an Wang <wangyuan46(a)huawei.com> driver inclusion category: Feature bugzilla: NA CVE: NA In this patch, provide data_mode para to support rand data with post process, such as sm3 and poker test. Signed-off-by: Yu'an Wang <wangyuan46(a)huawei.com> Reviewed-by: Weili Qian <qianweili(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- drivers/char/hw_random/hisi-trng-v2.c | 73 ++++++++++++++++++++++++++- 1 file changed, 72 insertions(+), 1 deletion(-) diff --git a/drivers/char/hw_random/hisi-trng-v2.c b/drivers/char/hw_random/hisi-trng-v2.c index 5475799989970..17f7a3f9a2f0e 100644 --- a/drivers/char/hw_random/hisi-trng-v2.c +++ b/drivers/char/hw_random/hisi-trng-v2.c @@ -10,18 +10,79 @@ #include <linux/module.h> #include <linux/platform_device.h> #include <linux/random.h> +#include <linux/arm-smccc.h> +#define HISI_TRNG_SMC_CMD 0x83000109 +#define HISI_TRNG_SMC_BYTES 32 #define HISI_TRNG_REG 0x00F0 #define HISI_TRNG_BYTES 4 #define HISI_TRNG_QUALITY 512 #define SLEEP_US 10 #define TIMEOUT_US 10000 +#define RAND_DATA_NORMAL 0 +#define RAND_DATA_POSTPRO 1 struct hisi_trng { void __iomem *base; struct hwrng rng; + void *va; + phys_addr_t pa; }; +static int data_mode_set(const char *val, const struct kernel_param *kp) +{ + u32 n; + int ret; + + if (!val) + return -EINVAL; + + ret = kstrtou32(val, 10, &n); + if (ret < 0 || (n != RAND_DATA_NORMAL && n != RAND_DATA_POSTPRO)) + return -EINVAL; + + return param_set_int(val, kp); +} + +static const struct kernel_param_ops data_mode_ops = { + .set = data_mode_set, + .get = param_get_int, +}; + +static int data_mode = RAND_DATA_NORMAL; +module_param_cb(data_mode, &data_mode_ops, &data_mode, 0444); +MODULE_PARM_DESC(data_mode, "Rand data with post process or not, 0(default), 1"); + +static int hisi_trng_read_v2(struct hwrng *rng, void *buf, size_t max, + bool wait) +{ + struct arm_smccc_res res = {0}; + struct hisi_trng *trng; + int currsize = 0; + + trng = container_of(rng, struct hisi_trng, rng); + + do { + arm_smccc_smc(HISI_TRNG_SMC_CMD, trng->pa, 0, 0, 0, 0, 0, 0, + &res); + if (res.a0) + return currsize; + + if (max - currsize >= HISI_TRNG_SMC_BYTES) { + memcpy(buf + currsize, trng->va, HISI_TRNG_SMC_BYTES); + currsize += HISI_TRNG_SMC_BYTES; + if (currsize == max) + return currsize; + continue; + } + + memcpy(buf + currsize, trng->va, max - currsize); + currsize = max; + } while (currsize < max); + + return currsize; +} + static int hisi_trng_read(struct hwrng *rng, void *buf, size_t max, bool wait) { struct hisi_trng *trng; @@ -69,9 +130,19 @@ static int hisi_trng_probe(struct platform_device *pdev) return PTR_ERR(trng->base); trng->rng.name = pdev->name; - trng->rng.read = hisi_trng_read; trng->rng.quality = HISI_TRNG_QUALITY; + if (data_mode) { + trng->rng.read = hisi_trng_read_v2; + trng->va = devm_kzalloc(&pdev->dev, HISI_TRNG_SMC_BYTES, + GFP_KERNEL); + if (!trng->va) + return -ENOMEM; + + trng->pa = virt_to_phys(trng->va); + } else + trng->rng.read = hisi_trng_read; + ret = devm_hwrng_register(&pdev->dev, &trng->rng); if (ret) dev_err(&pdev->dev, "failed to register hwrng!\n"); -- 2.25.1

1 0

[PATCH openEuler-1.0-LTS 1/5] arm64: smp: Add support for cpu park
by sangyan＠huawei.com 23 Apr '21

23 Apr '21

From: Sang Yan <sangyan(a)huawei.com> hulk inclusion from openEuler-21.03 commit 6d3c56fa93e3 ("arm64: smp: Add support for cpu park") category: feature bugzilla: 48159 CVE: N/A ------------------------------ Introducing a feature of CPU PARK in order to save time of cpus down and up during kexec, which may cost 250ms of per cpu's down and 30ms of up. As a result, for 128 cores, it costs more than 30 seconds to down and up cpus during kexec. Think about 256 cores and more. CPU PARK is a state that cpu power-on and staying in spin loop, polling for exit chances, such as writing exit address. Reserving a block of memory, to fill with cpu park text section, exit address and park-magic-flag of each cpu. In implementation, reserved one page for one cpu core. Cpus going to park state instead of down in machine_shutdown(). Cpus going out of park state in smp_init instead of brought up. One of cpu park sections in pre-reserved memory blocks,: +--------------+ + exit address + +--------------+ + park magic + +--------------+ + park codes + + . + + . + + . + +--------------+ Signed-off-by: Sang Yan <sangyan(a)huawei.com> --- arch/arm64/Kconfig | 12 +++ arch/arm64/include/asm/kexec.h | 7 ++ arch/arm64/include/asm/smp.h | 16 +++ arch/arm64/kernel/Makefile | 1 + arch/arm64/kernel/cpu-park.S | 59 ++++++++++ arch/arm64/kernel/machine_kexec.c | 2 +- arch/arm64/kernel/process.c | 4 + arch/arm64/kernel/smp.c | 222 ++++++++++++++++++++++++++++++++++++++ arch/arm64/mm/init.c | 64 +++++++++++ 9 files changed, 386 insertions(+), 1 deletion(-) create mode 100644 arch/arm64/kernel/cpu-park.S diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 37c5064..dec367a 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -964,6 +964,18 @@ config CRASH_DUMP For more details see Documentation/kdump/kdump.txt +config ARM64_CPU_PARK + bool "Support CPU PARK on kexec" + depends on SMP + depends on KEXEC_CORE + help + This enables support for CPU PARK feature in + order to save time of cpu down to up. + CPU park is a state through kexec, spin loop + instead of cpu die before jumping to new kernel, + jumping out from loop to new kernel entry in + smp_init. + config XEN_DOM0 def_bool y depends on XEN diff --git a/arch/arm64/include/asm/kexec.h b/arch/arm64/include/asm/kexec.h index 87e75d0..30ab1fa 100644 --- a/arch/arm64/include/asm/kexec.h +++ b/arch/arm64/include/asm/kexec.h @@ -31,6 +31,11 @@ /* 2M alignment for crash kernel regions */ #define CRASH_ALIGN SZ_2M +#ifdef CONFIG_ARM64_CPU_PARK +/* CPU park state flag: "park" */ +#define PARK_MAGIC 0x7061726b +#endif + #ifndef __ASSEMBLY__ /** @@ -96,6 +101,8 @@ static inline void crash_prepare_suspend(void) {} static inline void crash_post_resume(void) {} #endif +void machine_kexec_mask_interrupts(void); + #endif /* __ASSEMBLY__ */ #endif diff --git a/arch/arm64/include/asm/smp.h b/arch/arm64/include/asm/smp.h index 403c22f..f0898dc 100644 --- a/arch/arm64/include/asm/smp.h +++ b/arch/arm64/include/asm/smp.h @@ -153,6 +153,22 @@ extern bool smp_crash_stop_failed(void); void ipi_set_nmi_prio(void __iomem *base, u8 prio); +#ifdef CONFIG_ARM64_CPU_PARK +#define PARK_SECTION_SIZE 1024 +struct cpu_park_info { + /* Physical address of reserved park memory. */ + unsigned long start; + /* park reserve mem len should be PARK_SECTION_SIZE * NR_CPUS */ + unsigned long len; + /* Virtual address of reserved park memory. */ + unsigned long start_v; +}; +extern struct cpu_park_info park_info; +extern void enter_cpu_park(unsigned long text, unsigned long exit); +extern void do_cpu_park(unsigned long exit); +extern int kexec_smp_send_park(void); +#endif + #endif /* ifndef __ASSEMBLY__ */ #endif /* ifndef __ASM_SMP_H */ diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile index 6dd565a..d2861d7 100644 --- a/arch/arm64/kernel/Makefile +++ b/arch/arm64/kernel/Makefile @@ -56,6 +56,7 @@ arm64-obj-$(CONFIG_RANDOMIZE_BASE) += kaslr.o arm64-obj-$(CONFIG_HIBERNATION) += hibernate.o hibernate-asm.o arm64-obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o \ cpu-reset.o +arm64-obj-$(CONFIG_ARM64_CPU_PARK) += cpu-park.o arm64-obj-$(CONFIG_ARM64_RELOC_TEST) += arm64-reloc-test.o arm64-reloc-test-y := reloc_test_core.o reloc_test_syms.o arm64-obj-$(CONFIG_CRASH_DUMP) += crash_dump.o diff --git a/arch/arm64/kernel/cpu-park.S b/arch/arm64/kernel/cpu-park.S new file mode 100644 index 0000000..fc8f61e --- /dev/null +++ b/arch/arm64/kernel/cpu-park.S @@ -0,0 +1,59 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * CPU park routines + * + * Copyright (C) 2020 Huawei Technologies., Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/linkage.h> +#include <asm/assembler.h> +#include <asm/kexec.h> +#include <asm/sysreg.h> +#include <asm/virt.h> + +.text +.pushsection .idmap.text, "awx" + +/* cpu park helper in idmap section */ +ENTRY(enter_cpu_park) + /* Clear sctlr_el1 flags. */ + mrs x12, sctlr_el1 + mov_q x13, SCTLR_ELx_FLAGS + bic x12, x12, x13 + pre_disable_mmu_workaround + msr sctlr_el1, x12 /* disable mmu */ + isb + + mov x18, x0 + mov x0, x1 /* secondary_entry addr */ + br x18 /* call do_cpu_park of each cpu */ +ENDPROC(enter_cpu_park) + +.popsection + +ENTRY(do_cpu_park) + ldr x18, =PARK_MAGIC /* magic number "park" */ + add x1, x0, #8 + str x18, [x1] /* set on-park flag */ + dc civac, x1 /* flush cache of "park" */ + dsb nsh + isb + +.Lloop: + wfe + isb + ldr x19, [x0] + cmp x19, #0 /* test secondary_entry */ + b.eq .Lloop + + ic iallu /* invalidate the local I-cache */ + dsb nsh + isb + + br x19 /* jump to secondary_entry */ +ENDPROC(do_cpu_park) + diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machine_kexec.c index 7aef7ac..b41d6d4 100644 --- a/arch/arm64/kernel/machine_kexec.c +++ b/arch/arm64/kernel/machine_kexec.c @@ -221,7 +221,7 @@ void machine_kexec(struct kimage *kimage) BUG(); /* Should never get here. */ } -static void machine_kexec_mask_interrupts(void) +void machine_kexec_mask_interrupts(void) { unsigned int i; struct irq_desc *desc; diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index 8342459..ddb1911 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -151,6 +151,10 @@ void arch_cpu_idle_dead(void) */ void machine_shutdown(void) { +#ifdef CONFIG_ARM64_CPU_PARK + if (kexec_smp_send_park() == 0) + return; +#endif disable_nonboot_cpus(); } diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 5235b9a..090e760 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -98,6 +98,167 @@ static inline int op_cpu_kill(unsigned int cpu) } #endif +#ifdef CONFIG_ARM64_CPU_PARK +struct cpu_park_section { + unsigned long exit; /* exit address of park look */ + unsigned long magic; /* maigc represent park state */ + char text[0]; /* text section of park */ +}; + +static int mmap_cpu_park_mem(void) +{ + if (!park_info.start) + return -ENOMEM; + + if (park_info.start_v) + return 0; + + park_info.start_v = (unsigned long)__ioremap(park_info.start, + park_info.len, + PAGE_KERNEL_EXEC); + if (!park_info.start_v) { + pr_warn("map park memory failed."); + return -ENOMEM; + } + + return 0; +} + +static inline unsigned long cpu_park_section_v(unsigned int cpu) +{ + return park_info.start_v + PARK_SECTION_SIZE * (cpu - 1); +} + +static inline unsigned long cpu_park_section_p(unsigned int cpu) +{ + return park_info.start + PARK_SECTION_SIZE * (cpu - 1); +} + +/* + * Write the secondary_entry to exit section of park state. + * Then the secondary cpu will jump straight into the kernel + * by the secondary_entry. + */ +static int write_park_exit(unsigned int cpu) +{ + struct cpu_park_section *park_section; + unsigned long *park_exit; + unsigned long *park_text; + + if (mmap_cpu_park_mem() != 0) + return -EPERM; + + park_section = (struct cpu_park_section *)cpu_park_section_v(cpu); + park_exit = &park_section->exit; + park_text = (unsigned long *)park_section->text; + pr_debug("park_text 0x%lx : 0x%lx, do_cpu_park text 0x%lx : 0x%lx", + (unsigned long)park_text, *park_text, + (unsigned long)do_cpu_park, + *(unsigned long *)do_cpu_park); + + /* + * Test first 8 bytes to determine + * whether needs to write cpu park exit. + */ + if (*park_text == *(unsigned long *)do_cpu_park) { + writeq_relaxed(__pa_symbol(secondary_entry), park_exit); + __flush_dcache_area((__force void *)park_exit, + sizeof(unsigned long)); + flush_icache_range((unsigned long)park_exit, + (unsigned long)(park_exit + 1)); + sev(); + dsb(sy); + isb(); + + pr_debug("Write cpu %u secondary entry 0x%lx to 0x%lx.", + cpu, *park_exit, (unsigned long)park_exit); + pr_info("Boot cpu %u from PARK state.", cpu); + return 0; + } + + return -EPERM; +} + +/* Install cpu park sections for the specific cpu. */ +static int install_cpu_park(unsigned int cpu) +{ + struct cpu_park_section *park_section; + unsigned long *park_exit; + unsigned long *park_magic; + unsigned long park_text_len; + + park_section = (struct cpu_park_section *)cpu_park_section_v(cpu); + pr_debug("Install cpu park on cpu %u park exit 0x%lx park text 0x%lx", + cpu, (unsigned long)park_section, + (unsigned long)(park_section->text)); + + park_exit = &park_section->exit; + park_magic = &park_section->magic; + park_text_len = PARK_SECTION_SIZE - sizeof(struct cpu_park_section); + + *park_exit = 0UL; + *park_magic = 0UL; + memcpy((void *)park_section->text, do_cpu_park, park_text_len); + __flush_dcache_area((void *)park_section, PARK_SECTION_SIZE); + + return 0; +} + +static int uninstall_cpu_park(unsigned int cpu) +{ + unsigned long park_section; + + if (mmap_cpu_park_mem() != 0) + return -EPERM; + + park_section = cpu_park_section_v(cpu); + memset((void *)park_section, 0, PARK_SECTION_SIZE); + __flush_dcache_area((void *)park_section, PARK_SECTION_SIZE); + + return 0; +} + +static int cpu_wait_park(unsigned int cpu) +{ + long timeout; + struct cpu_park_section *park_section; + + volatile unsigned long *park_magic; + + park_section = (struct cpu_park_section *)cpu_park_section_v(cpu); + park_magic = &park_section->magic; + + timeout = USEC_PER_SEC; + while (*park_magic != PARK_MAGIC && timeout--) + udelay(1); + + if (timeout > 0) + pr_debug("cpu %u park done.", cpu); + else + pr_err("cpu %u park failed.", cpu); + + return *park_magic == PARK_MAGIC; +} + +static void cpu_park(unsigned int cpu) +{ + unsigned long park_section_p; + unsigned long park_exit_phy; + unsigned long do_park; + typeof(enter_cpu_park) *park; + + park_section_p = cpu_park_section_p(cpu); + park_exit_phy = park_section_p; + pr_debug("Go to park cpu %u exit address 0x%lx", cpu, park_exit_phy); + + do_park = park_section_p + sizeof(struct cpu_park_section); + park = (void *)__pa_symbol(enter_cpu_park); + + cpu_install_idmap(); + park(do_park, park_exit_phy); + unreachable(); +} +#endif /* * Boot a secondary CPU, and assign it the specified idle task. @@ -105,6 +266,10 @@ static inline int op_cpu_kill(unsigned int cpu) */ static int boot_secondary(unsigned int cpu, struct task_struct *idle) { +#ifdef CONFIG_ARM64_CPU_PARK + if (write_park_exit(cpu) == 0) + return 0; +#endif if (cpu_ops[cpu]->cpu_boot) return cpu_ops[cpu]->cpu_boot(cpu); @@ -153,6 +318,10 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle) return ret; } +#ifdef CONFIG_ARM64_CPU_PARK + uninstall_cpu_park(cpu); +#endif + secondary_data.task = NULL; secondary_data.stack = NULL; status = READ_ONCE(secondary_data.status); @@ -863,6 +1032,20 @@ static void ipi_cpu_stop(unsigned int cpu) local_daif_mask(); sdei_mask_local_cpu(); +#ifdef CONFIG_ARM64_CPU_PARK + /* + * Go to cpu park state. + * Otherwise go to cpu die. + */ + if (kexec_in_progress && park_info.start_v) { + machine_kexec_mask_interrupts(); + cpu_park(cpu); + + if (cpu_ops[cpu]->cpu_die) + cpu_ops[cpu]->cpu_die(cpu); + } +#endif + while (1) cpu_relax(); } @@ -1037,6 +1220,45 @@ void smp_send_stop(void) sdei_mask_local_cpu(); } +#ifdef CONFIG_ARM64_CPU_PARK +int kexec_smp_send_park(void) +{ + unsigned long cpu; + + if (WARN_ON(!kexec_in_progress)) { + pr_crit("%s called not in kexec progress.", __func__); + return -EPERM; + } + + if (mmap_cpu_park_mem() != 0) { + pr_info("no cpuparkmem, goto normal way."); + return -EPERM; + } + + local_irq_disable(); + + if (num_online_cpus() > 1) { + cpumask_t mask; + + cpumask_copy(&mask, cpu_online_mask); + cpumask_clear_cpu(smp_processor_id(), &mask); + + for_each_cpu(cpu, &mask) + install_cpu_park(cpu); + smp_cross_call(&mask, IPI_CPU_STOP); + + /* Wait for other CPUs to park */ + for_each_cpu(cpu, &mask) + cpu_wait_park(cpu); + pr_info("smp park other cpus done\n"); + } + + sdei_mask_local_cpu(); + + return 0; +} +#endif + #ifdef CONFIG_KEXEC_CORE void crash_smp_send_stop(void) { diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index 0773205..3a914ff 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -466,6 +466,57 @@ static int __init parse_memmap_opt(char *str) } early_param("memmap", parse_memmap_opt); +#ifdef CONFIG_ARM64_CPU_PARK +struct cpu_park_info park_info = { + .start = 0, + .len = PARK_SECTION_SIZE * NR_CPUS, + .start_v = 0, +}; + +static int __init parse_park_mem(char *p) +{ + if (!p) + return 0; + + park_info.start = PAGE_ALIGN(memparse(p, NULL)); + if (park_info.start == 0) + pr_info("cpu park mem params[%s]", p); + + return 0; +} +early_param("cpuparkmem", parse_park_mem); + +static int __init reserve_park_mem(void) +{ + if (park_info.start == 0 || park_info.len == 0) + return 0; + + park_info.start = PAGE_ALIGN(park_info.start); + park_info.len = PAGE_ALIGN(park_info.len); + + if (!memblock_is_region_memory(park_info.start, park_info.len)) { + pr_warn("cannot reserve park mem: region is not memory!"); + goto out; + } + + if (memblock_is_region_reserved(park_info.start, park_info.len)) { + pr_warn("cannot reserve park mem: region overlaps reserved memory!"); + goto out; + } + + memblock_remove(park_info.start, park_info.len); + pr_info("cpu park mem reserved: 0x%016lx - 0x%016lx (%ld MB)", + park_info.start, park_info.start + park_info.len, + park_info.len >> 20); + + return 0; +out: + park_info.start = 0; + park_info.len = 0; + return -EINVAL; +} +#endif + void __init arm64_memblock_init(void) { const s64 linear_region_size = -(s64)PAGE_OFFSET; @@ -582,6 +633,19 @@ void __init arm64_memblock_init(void) else arm64_dma_phys_limit = PHYS_MASK + 1; + /* + * Reserve park memory before crashkernel and quick kexec. + * Because park memory must be specified by address, but + * crashkernel and quickkexec may be specified by memory length, + * then find one sutiable memory region to reserve. + * + * So reserve park memory firstly is better, but it may cause + * crashkernel or quickkexec reserving failed. + */ +#ifdef CONFIG_ARM64_CPU_PARK + reserve_park_mem(); +#endif + reserve_crashkernel(); reserve_elfcorehdr(); -- 2.9.5

1 4

[PATCH openEuler-1.0-LTS 00/13] KVM: arm64 support vCPU
by Cheng Jian 22 Apr '21

22 Apr '21

This patch set aims to support the vCPU preempted check under KVM/arm64. Christoffer Dall (1): KVM: arm/arm64: Factor out hypercall handling from PSCI code Qian Cai (1): arm64/spinlock: fix a -Wunused-function warning Steven Price (3): KVM: Implement kvm_put_guest() arm/arm64: Provide a wrapper for SMCCC 1.1 calls arm/arm64: Make use of the SMCCC 1.1 wrapper Waiman Long (1): locking/osq: Use optimized spinning loop for arm64 Wanpeng Li (2): KVM: Boost vCPUs that are delivering interrupts KVM: Check preempted_in_kernel for involuntary preemption Zengruan Ye (5): KVM: arm64: Document PV-sched interface KVM: arm64: Implement PV_SCHED_FEATURES call KVM: arm64: Support pvsched preempted via shared structure KVM: arm64: Add interface to support vCPU preempted check KVM: arm64: Support the vCPU preemption check Documentation/virtual/kvm/arm/pvsched.txt | 56 +++++++++++ arch/arm/include/asm/kvm_host.h | 20 ++++ arch/arm/kvm/Makefile | 2 +- arch/arm/kvm/handle_exit.c | 2 +- arch/arm/mm/proc-v7-bugs.c | 13 +-- arch/arm64/include/asm/kvm_host.h | 18 ++++ arch/arm64/include/asm/paravirt.h | 25 ++++- arch/arm64/include/asm/pvsched-abi.h | 16 +++ arch/arm64/include/asm/spinlock.h | 23 +++++ arch/arm64/kernel/Makefile | 2 +- arch/arm64/kernel/cpu_errata.c | 82 ++++++--------- arch/arm64/kernel/paravirt-spinlocks.c | 13 +++ arch/arm64/kernel/paravirt.c | 117 ++++++++++++++++++++++ arch/arm64/kernel/setup.c | 2 + arch/arm64/kvm/Makefile | 2 + arch/arm64/kvm/handle_exit.c | 4 +- arch/s390/kvm/interrupt.c | 2 +- include/kvm/arm_hypercalls.h | 43 ++++++++ include/kvm/arm_psci.h | 2 +- include/linux/arm-smccc.h | 65 ++++++++++++ include/linux/kvm_host.h | 23 +++++ include/linux/kvm_types.h | 2 + kernel/locking/osq_lock.c | 23 ++--- virt/kvm/arm/arm.c | 8 ++ virt/kvm/arm/hypercalls.c | 69 +++++++++++++ virt/kvm/arm/psci.c | 76 +------------- virt/kvm/arm/pvsched.c | 55 ++++++++++ virt/kvm/kvm_main.c | 17 ++-- 28 files changed, 620 insertions(+), 162 deletions(-) create mode 100644 Documentation/virtual/kvm/arm/pvsched.txt create mode 100644 arch/arm64/include/asm/pvsched-abi.h create mode 100644 arch/arm64/kernel/paravirt-spinlocks.c create mode 100644 include/kvm/arm_hypercalls.h create mode 100644 virt/kvm/arm/hypercalls.c create mode 100644 virt/kvm/arm/pvsched.c -- 2.25.1

1 9

[PATCH kernel-4.19 0/5] refetch framework for bcache
by Cheng Jian 22 Apr '21

22 Apr '21

Add a framework to prefetch in bcache. This framework is useful to extend current readahead in bcache, current simply append piece of data of a fixed length, which cannot increase performance well. The framework records every read request from a bcache device and send them to a userspace client, which calculates proper prefetch length ot each request and send them to kernel, and execute prefetch asynchronously. Li Ruilin (5): bcache: add a framework to perform prefetch bcache: provide a switch to bypass all IO requests bcache: inflight prefetch requests block overlapped normal requests bcache: Delay to invalidate cache data in writearound write bcache: Add a sample of userspace prefetch client Documentation/admin-guide/bcache.rst | 4 + drivers/md/bcache/Makefile | 2 +- drivers/md/bcache/acache.c | 591 +++++++++++++++++++++++++++ drivers/md/bcache/acache.h | 79 ++++ drivers/md/bcache/bcache.h | 8 +- drivers/md/bcache/btree.c | 4 +- drivers/md/bcache/request.c | 131 ++++-- drivers/md/bcache/request.h | 31 ++ drivers/md/bcache/stats.c | 13 + drivers/md/bcache/stats.h | 3 + drivers/md/bcache/super.c | 6 + drivers/md/bcache/sysfs.c | 12 + include/trace/events/bcache.h | 22 + samples/acache_client/Makefile | 13 + samples/acache_client/connect.c | 144 +++++++ samples/acache_client/connect.h | 74 ++++ samples/acache_client/main.c | 133 ++++++ 17 files changed, 1222 insertions(+), 48 deletions(-) create mode 100644 drivers/md/bcache/acache.c create mode 100644 drivers/md/bcache/acache.h create mode 100644 samples/acache_client/Makefile create mode 100644 samples/acache_client/connect.c create mode 100644 samples/acache_client/connect.h create mode 100644 samples/acache_client/main.c -- 2.25.1

1 5

[PATCH openEuler-1.0-LTS 26/28] ext4: fix time overflow
by Cheng Jian 22 Apr '21

22 Apr '21

From: Yu Kuai <yukuai3(a)huawei.com> hulk inclusion category: bugfix bugzilla: 50526 CVE: NA --------------------------- Inode atime/mtime is 64-bit, however ext4 ondisk atime/mtime is 32-bit( 34-bit if extra time is enabled). Thus if in-memory atime/mtime overflow, after umount and mount, atime/mtime will be wrong. In order to fix it, truncate atime/ctime/mtime in ext4_setattr(). This problem was fixed in commit 4881c4971df0 ("ext4: Initialize timestamps limits") from mainline, which relied on commit 50e17c000c46 ("vfs: Add timestamp_truncate() api") and commit 188d20bcd1eb ("vfs: Add file timestamp range support"). However, kabi will be broken if we backport these patches, thus we do local adaptation for ext4 instead. Signed-off-by: Yu Kuai <yukuai3(a)huawei.com> Reviewed-by: zhangyi (F) <yi.zhang(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Signed-off-by: Cheng Jian <cj.chengjian(a)huawei.com> --- fs/ext4/ext4.h | 10 +++++++++- fs/ext4/inode.c | 25 +++++++++++++++++++++++++ 2 files changed, 34 insertions(+), 1 deletion(-) diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 975b86151b37..46d7f5162de5 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -258,6 +258,10 @@ struct ext4_io_submit { /* First non-reserved inode for old ext4 filesystems */ #define EXT4_GOOD_OLD_FIRST_INO 11 +#define EXT4_EXTRA_TIMESTAMP_MAX (((s64)1 << 34) - 1 + S32_MIN) +#define EXT4_NON_EXTRA_TIMESTAMP_MAX S32_MAX +#define EXT4_TIMESTAMP_MIN S32_MIN + /* * Maximal count of links to a file */ @@ -842,11 +846,15 @@ static inline void ext4_decode_extra_time(struct timespec64 *time, #define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode) \ do { \ - (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec); \ if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) {\ + (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec); \ (raw_inode)->xtime ## _extra = \ ext4_encode_extra_time(&(inode)->xtime); \ } \ + else {\ + (raw_inode)->xtime = cpu_to_le32(clamp_t(int32_t, (inode)->xtime.tv_sec, S32_MIN, S32_MAX)); \ + ext4_warning_inode(inode, "inode does not support timestamps beyond 2038"); \ + } \ } while (0) #define EXT4_EINODE_SET_XTIME(xtime, einode, raw_inode) \ diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index c68823c50688..ec6b18ba946c 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -5548,6 +5548,29 @@ static void ext4_wait_for_tail_page_commit(struct inode *inode) } } +static void ext4_timestamp_truncate(struct inode *inode, struct iattr *attr) +{ + time64_t max; + + if (!(attr->ia_valid & (ATTR_ATIME | ATTR_CTIME | ATTR_MTIME))) + return; + + if (inode->i_sb->s_time_gran == 1) + max = EXT4_EXTRA_TIMESTAMP_MAX; + else + max = EXT4_NON_EXTRA_TIMESTAMP_MAX; + + if (attr->ia_valid & ATTR_ATIME) + attr->ia_atime.tv_sec = clamp(attr->ia_atime.tv_sec, + (time64_t)EXT4_TIMESTAMP_MIN, max); + if (attr->ia_valid & ATTR_CTIME) + attr->ia_ctime.tv_sec = clamp(attr->ia_ctime.tv_sec, + (time64_t)EXT4_TIMESTAMP_MIN, max); + if (attr->ia_valid & ATTR_MTIME) + attr->ia_mtime.tv_sec = clamp(attr->ia_mtime.tv_sec, + (time64_t)EXT4_TIMESTAMP_MIN, max); +} + /* * ext4_setattr() * @@ -5603,6 +5626,7 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr) if (error) return error; } + if ((ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, inode->i_uid)) || (ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid))) { handle_t *handle; @@ -5736,6 +5760,7 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr) } if (!error) { + ext4_timestamp_truncate(inode, attr); setattr_copy(inode, attr); mark_inode_dirty(inode); } -- 2.25.1

1 0

[PATCH openEuler-1.0-LTS 25/28] ext4: drop legacy pre-1970 encoding workaround
by Cheng Jian 22 Apr '21

22 Apr '21

From: Theodore Ts'o <tytso(a)mit.edu> mainline inclusion from mainline-5.4-rc1 commit cd2d99229dc96219547e6349841e1aad851c6acc category: bugfix bugzilla: 50526 CVE: NA --------------------------- Originally, support for expanded timestamps had a bug in that pre-1970 times were erroneously encoded as being in the the 24th century. This was fixed in commit a4dad1ae24f8 ("ext4: Fix handling of extended tv_sec") which landed in 4.4. Starting with 4.4, pre-1970 timestamps were correctly encoded, but for backwards compatibility those incorrectly encoded timestamps were mapped back to the pre-1970 dates. Given that backwards compatibility workaround has been around for 4 years, and given that running e2fsck from e2fsprogs 1.43.2 and later will offer to fix these timestamps (which has been released for 3 years), it's past time to drop the legacy workaround from the kernel. Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> Signed-off-by: Yu Kuai <yukuai3(a)huawei.com> Reviewed-by: zhangyi (F) <yi.zhang(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Signed-off-by: Cheng Jian <cj.chengjian(a)huawei.com> --- fs/ext4/ext4.h | 15 +-------------- 1 file changed, 1 insertion(+), 14 deletions(-) diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 1f1099a390ef..975b86151b37 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -835,21 +835,8 @@ static inline __le32 ext4_encode_extra_time(struct timespec64 *time) static inline void ext4_decode_extra_time(struct timespec64 *time, __le32 extra) { - if (unlikely(extra & cpu_to_le32(EXT4_EPOCH_MASK))) { - -#if 1 - /* Handle legacy encoding of pre-1970 dates with epoch - * bits 1,1. (This backwards compatibility may be removed - * at the discretion of the ext4 developers.) - */ - u64 extra_bits = le32_to_cpu(extra) & EXT4_EPOCH_MASK; - if (extra_bits == 3 && ((time->tv_sec) & 0x80000000) != 0) - extra_bits = 0; - time->tv_sec += extra_bits << 32; -#else + if (unlikely(extra & cpu_to_le32(EXT4_EPOCH_MASK))) time->tv_sec += (u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK) << 32; -#endif - } time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> EXT4_EPOCH_BITS; } -- 2.25.1

1 0

[PATCH openEuler-1.0-LTS 24/28] fuse: fix live lock in fuse_iget()
by Cheng Jian 22 Apr '21

22 Apr '21

From: Amir Goldstein <amir73il(a)gmail.com> mainline inclusion from mainline-v5.12-rc4 commit 775c5033a0d164622d9d10dd0f0a5531639ed3ed category: bugfix bugzilla: NA CVE: CVE-2021-28950 -------------------------------- Commit 5d069dbe8aaf ("fuse: fix bad inode") replaced make_bad_inode() in fuse_iget() with a private implementation fuse_make_bad(). The private implementation fails to remove the bad inode from inode cache, so the retry loop with iget5_locked() finds the same bad inode and marks it bad forever. kmsg snip: [ ] rcu: INFO: rcu_sched self-detected stall on CPU ... [ ] ? bit_wait_io+0x50/0x50 [ ] ? fuse_init_file_inode+0x70/0x70 [ ] ? find_inode.isra.32+0x60/0xb0 [ ] ? fuse_init_file_inode+0x70/0x70 [ ] ilookup5_nowait+0x65/0x90 [ ] ? fuse_init_file_inode+0x70/0x70 [ ] ilookup5.part.36+0x2e/0x80 [ ] ? fuse_init_file_inode+0x70/0x70 [ ] ? fuse_inode_eq+0x20/0x20 [ ] iget5_locked+0x21/0x80 [ ] ? fuse_inode_eq+0x20/0x20 [ ] fuse_iget+0x96/0x1b0 Fixes: 5d069dbe8aaf ("fuse: fix bad inode") Cc: stable(a)vger.kernel.org # 5.10+ Signed-off-by: Amir Goldstein <amir73il(a)gmail.com> Signed-off-by: Miklos Szeredi <mszeredi(a)redhat.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Reviewed-by: Xiu Jianfeng <xiujianfeng(a)huawei.com> Reviewed-by: zhangyi (F) <yi.zhang(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Signed-off-by: Cheng Jian <cj.chengjian(a)huawei.com> --- fs/fuse/fuse_i.h | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 3d88386047df..853d37ec81e0 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -704,6 +704,7 @@ static inline u64 get_node_id(struct inode *inode) static inline void fuse_make_bad(struct inode *inode) { + remove_inode_hash(inode); set_bit(FUSE_I_BAD, &get_fuse_inode(inode)->state); } -- 2.25.1

1 0

[PATCH openEuler-1.0-LTS 23/28] fuse: fix bad inode
by Cheng Jian 22 Apr '21

22 Apr '21

From: Miklos Szeredi <mszeredi(a)redhat.com> mainline inclusion from mainline-v5.11-rc1 commit 5d069dbe8aaf2a197142558b6fb2978189ba3454 category: bugfix bugzilla: NA CVE: CVE-2020-36322 -------------------------------- Jan Kara's analysis of the syzbot report (edited): The reproducer opens a directory on FUSE filesystem, it then attaches dnotify mark to the open directory. After that a fuse_do_getattr() call finds that attributes returned by the server are inconsistent, and calls make_bad_inode() which, among other things does: inode->i_mode = S_IFREG; This then confuses dnotify which doesn't tear down its structures properly and eventually crashes. Avoid calling make_bad_inode() on a live inode: switch to a private flag on the fuse inode. Also add the test to ops which the bad_inode_ops would have caught. This bug goes back to the initial merge of fuse in 2.6.14... Reported-by: syzbot+f427adf9324b92652ccc(a)syzkaller.appspotmail.com Signed-off-by: Miklos Szeredi <mszeredi(a)redhat.com> Tested-by: Jan Kara <jack(a)suse.cz> Cc: <stable(a)vger.kernel.org> Conflicts: fs/fuse/inode.c fs/fuse/file.c fs/fuse/xattr.c fs/fuse/dir.c fs/fuse/fuse_i.h [yyl: replace is_bad_inode() with fuse_is_bad(), readdir.c is not added in kernel-4.19] Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Reviewed-by: zhangyi (F) <yi.zhang(a)huawei.com> Reviewed-by: Xiu Jianfeng <xiujianfeng(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Signed-off-by: Cheng Jian <cj.chengjian(a)huawei.com> --- fs/fuse/acl.c | 6 ++++++ fs/fuse/dir.c | 37 ++++++++++++++++++++++++++++++++----- fs/fuse/file.c | 21 ++++++++++++--------- fs/fuse/fuse_i.h | 12 ++++++++++++ fs/fuse/inode.c | 2 +- fs/fuse/xattr.c | 9 +++++++++ 6 files changed, 72 insertions(+), 15 deletions(-) diff --git a/fs/fuse/acl.c b/fs/fuse/acl.c index 5a48cee6d7d3..f529075a2ce8 100644 --- a/fs/fuse/acl.c +++ b/fs/fuse/acl.c @@ -19,6 +19,9 @@ struct posix_acl *fuse_get_acl(struct inode *inode, int type) void *value = NULL; struct posix_acl *acl; + if (fuse_is_bad(inode)) + return ERR_PTR(-EIO); + if (!fc->posix_acl || fc->no_getxattr) return NULL; @@ -53,6 +56,9 @@ int fuse_set_acl(struct inode *inode, struct posix_acl *acl, int type) const char *name; int ret; + if (fuse_is_bad(inode)) + return -EIO; + if (!fc->posix_acl || fc->no_setxattr) return -EOPNOTSUPP; diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 6244345a5745..29d8aa4844ff 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -187,7 +187,7 @@ static int fuse_dentry_revalidate(struct dentry *entry, unsigned int flags) int ret; inode = d_inode_rcu(entry); - if (inode && is_bad_inode(inode)) + if (inode && fuse_is_bad(inode)) goto invalid; else if (time_before64(fuse_dentry_time(entry), get_jiffies_64()) || (flags & LOOKUP_REVAL)) { @@ -364,6 +364,9 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry, bool outarg_valid = true; bool locked; + if (fuse_is_bad(dir)) + return ERR_PTR(-EIO); + locked = fuse_lock_inode(dir); err = fuse_lookup_name(dir->i_sb, get_node_id(dir), &entry->d_name, &outarg, &inode); @@ -504,6 +507,9 @@ static int fuse_atomic_open(struct inode *dir, struct dentry *entry, struct fuse_conn *fc = get_fuse_conn(dir); struct dentry *res = NULL; + if (fuse_is_bad(dir)) + return -EIO; + if (d_in_lookup(entry)) { res = fuse_lookup(dir, entry, 0); if (IS_ERR(res)) @@ -552,6 +558,9 @@ static int create_new_entry(struct fuse_conn *fc, struct fuse_args *args, int err; struct fuse_forget_link *forget; + if (fuse_is_bad(dir)) + return -EIO; + forget = fuse_alloc_forget(); if (!forget) return -ENOMEM; @@ -679,6 +688,9 @@ static int fuse_unlink(struct inode *dir, struct dentry *entry) struct fuse_conn *fc = get_fuse_conn(dir); FUSE_ARGS(args); + if (fuse_is_bad(dir)) + return -EIO; + args.in.h.opcode = FUSE_UNLINK; args.in.h.nodeid = get_node_id(dir); args.in.numargs = 1; @@ -715,6 +727,9 @@ static int fuse_rmdir(struct inode *dir, struct dentry *entry) struct fuse_conn *fc = get_fuse_conn(dir); FUSE_ARGS(args); + if (fuse_is_bad(dir)) + return -EIO; + args.in.h.opcode = FUSE_RMDIR; args.in.h.nodeid = get_node_id(dir); args.in.numargs = 1; @@ -793,6 +808,9 @@ static int fuse_rename2(struct inode *olddir, struct dentry *oldent, struct fuse_conn *fc = get_fuse_conn(olddir); int err; + if (fuse_is_bad(olddir)) + return -EIO; + if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE)) return -EINVAL; @@ -928,7 +946,7 @@ static int fuse_do_getattr(struct inode *inode, struct kstat *stat, if (!err) { if (fuse_invalid_attr(&outarg.attr) || (inode->i_mode ^ outarg.attr.mode) & S_IFMT) { - make_bad_inode(inode); + fuse_make_bad(inode); err = -EIO; } else { fuse_change_attributes(inode, &outarg.attr, @@ -1125,6 +1143,9 @@ static int fuse_permission(struct inode *inode, int mask) bool refreshed = false; int err = 0; + if (fuse_is_bad(inode)) + return -EIO; + if (!fuse_allow_current_process(fc)) return -EACCES; @@ -1262,7 +1283,7 @@ static int fuse_direntplus_link(struct file *file, dput(dentry); goto retry; } - if (is_bad_inode(inode)) { + if (fuse_is_bad(inode)) { dput(dentry); return -EIO; } @@ -1360,7 +1381,7 @@ static int fuse_readdir(struct file *file, struct dir_context *ctx) u64 attr_version = 0; bool locked; - if (is_bad_inode(inode)) + if (fuse_is_bad(inode)) return -EIO; req = fuse_get_req(fc, 1); @@ -1718,7 +1739,7 @@ int fuse_do_setattr(struct dentry *dentry, struct iattr *attr, if (fuse_invalid_attr(&outarg.attr) || (inode->i_mode ^ outarg.attr.mode) & S_IFMT) { - make_bad_inode(inode); + fuse_make_bad(inode); err = -EIO; goto error; } @@ -1774,6 +1795,9 @@ static int fuse_setattr(struct dentry *entry, struct iattr *attr) struct file *file = (attr->ia_valid & ATTR_FILE) ? attr->ia_file : NULL; int ret; + if (fuse_is_bad(inode)) + return -EIO; + if (!fuse_allow_current_process(get_fuse_conn(inode))) return -EACCES; @@ -1832,6 +1856,9 @@ static int fuse_getattr(const struct path *path, struct kstat *stat, struct inode *inode = d_inode(path->dentry); struct fuse_conn *fc = get_fuse_conn(inode); + if (fuse_is_bad(inode)) + return -EIO; + if (!fuse_allow_current_process(fc)) return -EACCES; diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 6a3d89672ff7..c1af038920dc 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -207,6 +207,9 @@ int fuse_open_common(struct inode *inode, struct file *file, bool isdir) fc->atomic_o_trunc && fc->writeback_cache; + if (fuse_is_bad(inode)) + return -EIO; + err = generic_file_open(inode, file); if (err) return err; @@ -408,7 +411,7 @@ static int fuse_flush(struct file *file, fl_owner_t id) struct fuse_flush_in inarg; int err; - if (is_bad_inode(inode)) + if (fuse_is_bad(inode)) return -EIO; if (fc->no_flush) @@ -456,7 +459,7 @@ int fuse_fsync_common(struct file *file, loff_t start, loff_t end, struct fuse_fsync_in inarg; int err; - if (is_bad_inode(inode)) + if (fuse_is_bad(inode)) return -EIO; inode_lock(inode); @@ -771,7 +774,7 @@ static int fuse_readpage(struct file *file, struct page *page) int err; err = -EIO; - if (is_bad_inode(inode)) + if (fuse_is_bad(inode)) goto out; err = fuse_do_readpage(file, page); @@ -898,7 +901,7 @@ static int fuse_readpages(struct file *file, struct address_space *mapping, int nr_alloc = min_t(unsigned, nr_pages, FUSE_MAX_PAGES_PER_REQ); err = -EIO; - if (is_bad_inode(inode)) + if (fuse_is_bad(inode)) goto out; data.file = file; @@ -1128,7 +1131,7 @@ static ssize_t fuse_perform_write(struct kiocb *iocb, int err = 0; ssize_t res = 0; - if (is_bad_inode(inode)) + if (fuse_is_bad(inode)) return -EIO; if (inode->i_size < pos + iov_iter_count(ii)) @@ -1421,7 +1424,7 @@ static ssize_t __fuse_direct_read(struct fuse_io_priv *io, ssize_t res; struct inode *inode = file_inode(io->iocb->ki_filp); - if (is_bad_inode(inode)) + if (fuse_is_bad(inode)) return -EIO; res = fuse_direct_io(io, iter, ppos, 0); @@ -1443,7 +1446,7 @@ static ssize_t fuse_direct_write_iter(struct kiocb *iocb, struct iov_iter *from) struct fuse_io_priv io = FUSE_IO_PRIV_SYNC(iocb); ssize_t res; - if (is_bad_inode(inode)) + if (fuse_is_bad(inode)) return -EIO; /* Don't allow parallel writes to the same file */ @@ -1917,7 +1920,7 @@ static int fuse_writepages(struct address_space *mapping, int err; err = -EIO; - if (is_bad_inode(inode)) + if (fuse_is_bad(inode)) goto out; data.inode = inode; @@ -2702,7 +2705,7 @@ long fuse_ioctl_common(struct file *file, unsigned int cmd, if (!fuse_allow_current_process(fc)) return -EACCES; - if (is_bad_inode(inode)) + if (fuse_is_bad(inode)) return -EIO; return fuse_do_ioctl(file, cmd, arg, flags); diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index dbfc35efbefb..3d88386047df 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -118,6 +118,8 @@ enum { FUSE_I_INIT_RDPLUS, /** An operation changing file size is in progress */ FUSE_I_SIZE_UNSTABLE, + /* Bad inode */ + FUSE_I_BAD, }; struct fuse_conn; @@ -700,6 +702,16 @@ static inline u64 get_node_id(struct inode *inode) return get_fuse_inode(inode)->nodeid; } +static inline void fuse_make_bad(struct inode *inode) +{ + set_bit(FUSE_I_BAD, &get_fuse_inode(inode)->state); +} + +static inline bool fuse_is_bad(struct inode *inode) +{ + return unlikely(test_bit(FUSE_I_BAD, &get_fuse_inode(inode)->state)); +} + /** Device operations */ extern const struct file_operations fuse_dev_operations; diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index cb018315ecaf..821597c61884 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -317,7 +317,7 @@ struct inode *fuse_iget(struct super_block *sb, u64 nodeid, unlock_new_inode(inode); } else if ((inode->i_mode ^ attr->mode) & S_IFMT) { /* Inode has changed type, any I/O on the old should fail */ - make_bad_inode(inode); + fuse_make_bad(inode); iput(inode); goto retry; } diff --git a/fs/fuse/xattr.c b/fs/fuse/xattr.c index 433717640f78..a4b65374bced 100644 --- a/fs/fuse/xattr.c +++ b/fs/fuse/xattr.c @@ -113,6 +113,9 @@ ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size) struct fuse_getxattr_out outarg; ssize_t ret; + if (fuse_is_bad(inode)) + return -EIO; + if (!fuse_allow_current_process(fc)) return -EACCES; @@ -178,6 +181,9 @@ static int fuse_xattr_get(const struct xattr_handler *handler, struct dentry *dentry, struct inode *inode, const char *name, void *value, size_t size) { + if (fuse_is_bad(inode)) + return -EIO; + return fuse_getxattr(inode, name, value, size); } @@ -186,6 +192,9 @@ static int fuse_xattr_set(const struct xattr_handler *handler, const char *name, const void *value, size_t size, int flags) { + if (fuse_is_bad(inode)) + return -EIO; + if (!value) return fuse_removexattr(inode, name); -- 2.25.1

1 0

[PATCH openEuler-1.0-LTS 22/28] net/sctp: fix race condition in sctp_destroy_sock
by Cheng Jian 22 Apr '21

22 Apr '21

From: Or Cohen <orcohen(a)paloaltonetworks.com> mainline inclusion from mainline-v5.12-rc8 commit b166a20b07382b8bc1dcee2a448715c9c2c81b5b category: bugfix bugzilla: NA CVE: CVE-2021-23133 -------------------------------- If sctp_destroy_sock is called without sock_net(sk)->sctp.addr_wq_lock held and sp->do_auto_asconf is true, then an element is removed from the auto_asconf_splist without any proper locking. This can happen in the following functions: 1. In sctp_accept, if sctp_sock_migrate fails. 2. In inet_create or inet6_create, if there is a bpf program attached to BPF_CGROUP_INET_SOCK_CREATE which denies creation of the sctp socket. The bug is fixed by acquiring addr_wq_lock in sctp_destroy_sock instead of sctp_close. This addresses CVE-2021-23133. Reported-by: Or Cohen <orcohen(a)paloaltonetworks.com> Reviewed-by: Xin Long <lucien.xin(a)gmail.com> Fixes: 610236587600 ("bpf: Add new cgroup attach type to enable sock modifications") Signed-off-by: Or Cohen <orcohen(a)paloaltonetworks.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner(a)gmail.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Reviewed-by: Yue Haibing <yuehaibing(a)huawei.com> Reviewed-by: Xiu Jianfeng <xiujianfeng(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Signed-off-by: Cheng Jian <cj.chengjian(a)huawei.com> --- net/sctp/socket.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 733c3f448008..addfc8feaef5 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -1571,11 +1571,9 @@ static void sctp_close(struct sock *sk, long timeout) /* Supposedly, no process has access to the socket, but * the net layers still may. - * Also, sctp_destroy_sock() needs to be called with addr_wq_lock - * held and that should be grabbed before socket lock. */ - spin_lock_bh(&net->sctp.addr_wq_lock); - bh_lock_sock_nested(sk); + local_bh_disable(); + bh_lock_sock(sk); /* Hold the sock, since sk_common_release() will put sock_put() * and we have just a little more cleanup. @@ -1584,7 +1582,7 @@ static void sctp_close(struct sock *sk, long timeout) sk_common_release(sk); bh_unlock_sock(sk); - spin_unlock_bh(&net->sctp.addr_wq_lock); + local_bh_enable(); sock_put(sk); @@ -4779,9 +4777,6 @@ static int sctp_init_sock(struct sock *sk) sk_sockets_allocated_inc(sk); sock_prot_inuse_add(net, sk->sk_prot, 1); - /* Nothing can fail after this block, otherwise - * sctp_destroy_sock() will be called without addr_wq_lock held - */ if (net->sctp.default_auto_asconf) { spin_lock(&sock_net(sk)->sctp.addr_wq_lock); list_add_tail(&sp->auto_asconf_list, @@ -4816,7 +4811,9 @@ static void sctp_destroy_sock(struct sock *sk) if (sp->do_auto_asconf) { sp->do_auto_asconf = 0; + spin_lock_bh(&sock_net(sk)->sctp.addr_wq_lock); list_del(&sp->auto_asconf_list); + spin_unlock_bh(&sock_net(sk)->sctp.addr_wq_lock); } sctp_endpoint_free(sp->ep); local_bh_disable(); -- 2.25.1

1 0

[PATCH openEuler-1.0-LTS 21/28] config: set config hip08 prefetch default value
by Cheng Jian 22 Apr '21

22 Apr '21

From: Yang Yingliang <yangyingliang(a)huawei.com> hulk inclusion category: bugfix bugzilla: NA CVE: NA enable CONFIG_HISILICON_ERRATUM_HIP08_RU_PREFETCH, to add a cmdline option to disable prefetch. Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Reviewed-by: Xie XiuQi <xiexiuqi(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Signed-off-by: Cheng Jian <cj.chengjian(a)huawei.com> --- arch/arm64/configs/hulk_defconfig | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/configs/hulk_defconfig b/arch/arm64/configs/hulk_defconfig index 51d885d95453..5ae11e963337 100644 --- a/arch/arm64/configs/hulk_defconfig +++ b/arch/arm64/configs/hulk_defconfig @@ -398,6 +398,8 @@ CONFIG_ARM64_ERRATUM_845719=y # CONFIG_SOCIONEXT_SYNQUACER_PREITS is not set CONFIG_HISILICON_ERRATUM_161600802=y # CONFIG_QCOM_FALKOR_ERRATUM_E1041 is not set +CONFIG_HISILICON_ERRATUM_HIP08_RU_PREFETCH=y +# CONFIG_HISILICON_HIP08_RU_PREFETCH_DEFAULT_OFF is not set CONFIG_ARM64_4K_PAGES=y # CONFIG_ARM64_16K_PAGES is not set # CONFIG_ARM64_64K_PAGES is not set -- 2.25.1

1 0

[PATCH openEuler-1.0-LTS 20/28] ext4: do not set SB_ACTIVE in ext4_orphan_cleanup()
by Cheng Jian 22 Apr '21

22 Apr '21

From: Zhang Yi <yi.zhang(a)huawei.com> hulk inclusion category: bugfix bugzilla: 50774 CVE: NA --------------------------- When CONFIG_QUOTA is enabled, if we failed to mount the filesystem due to some error happens behind ext4_orphan_cleanup(), it will end up triggering a after free issue of super_block. The problem is that ext4_orphan_cleanup() will set SB_ACTIVE flag if CONFIG_QUOTA is enabled, after we cleanup the truncated inodes, the last iput() will put them into the lru list, and these inodes' pages may probably dirty and will be write back by the writeback thread, so it could be raced by freeing super_block in the error path of mount_bdev(). After check the setting of SB_ACTIVE flag in ext4_orphan_cleanup(), it was used to ensure updating the quota file properly, but evict inode and trash data immediately in the last iput does not affect the quotafile, so setting the SB_ACTIVE flag seems not required[1]. Fix this issue by just remove the SB_ACTIVE setting. [1] https://lore.kernel.org/linux-ext4/99cce8ca-e4a0-7301-840f-2ace67c551f3@hua… Cc: stable(a)kernel.org Signed-off-by: Zhang Yi <yi.zhang(a)huawei.com> Tested-by: Jan Kara <jack(a)suse.cz> Reviewed-by: Jan Kara <jack(a)suse.cz> Link: https://lore.kernel.org/r/20210331033138.918975-1-yi.zhang@huawei.com Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> Reviewed-by: Zhang Xiaoxu <zhangxiaoxu5(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Signed-off-by: Cheng Jian <cj.chengjian(a)huawei.com> --- fs/ext4/super.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 655ba77db225..5f95ed3fbf7d 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -2724,9 +2724,6 @@ static void ext4_orphan_cleanup(struct super_block *sb, sb->s_flags &= ~SB_RDONLY; } #ifdef CONFIG_QUOTA - /* Needed for iput() to work correctly and not trash data */ - sb->s_flags |= SB_ACTIVE; - /* * Turn on quotas which were not enabled for read-only mounts if * filesystem has quota feature, so that they are updated correctly. -- 2.25.1

1 0

[PATCH openEuler-1.0-LTS 19/28] RDMA/hns: add eq and cq time cfg compatibility support.
by Cheng Jian 22 Apr '21

22 Apr '21

From: wanglin <wanglin137(a)huawei.com> driver inclusion category: bugfix bugzilla: NA CVE: NA This patch add eq and cq time cfg compatibility support for new Hardware. Reviewed-by: Hu Chunzhi <huchunzhi(a)huawei.com> Reviewed-by: Zhao Weibo <zhaoweibo3(a)huawei.com> Signed-off-by: wanglin <wanglin137(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Signed-off-by: Cheng Jian <cj.chengjian(a)huawei.com> --- drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 69 +++++++++++++++++----- drivers/infiniband/hw/hns/hns_roce_hw_v2.h | 5 ++ 2 files changed, 58 insertions(+), 16 deletions(-) diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c index e1ba9877985b..4e81d1bf2441 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c @@ -1483,15 +1483,23 @@ static int hns_roce_config_global_param(struct hns_roce_dev *hr_dev) { struct hns_roce_cfg_global_param *req; struct hns_roce_cmq_desc desc; + u32 clock_cycles_of_1us; hns_roce_cmq_setup_basic_desc(&desc, HNS_ROCE_OPC_CFG_GLOBAL_PARAM, false); req = (struct hns_roce_cfg_global_param *)desc.data; memset(req, 0, sizeof(*req)); + + if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08_B) + clock_cycles_of_1us = HNS_ROCE_1NS_CFG; + else + clock_cycles_of_1us = HNS_ROCE_1US_CFG; + roce_set_field(req->time_cfg_udp_port, CFG_GLOBAL_PARAM_DATA_0_ROCEE_TIME_1US_CFG_M, - CFG_GLOBAL_PARAM_DATA_0_ROCEE_TIME_1US_CFG_S, 0); + CFG_GLOBAL_PARAM_DATA_0_ROCEE_TIME_1US_CFG_S, + clock_cycles_of_1us); roce_set_field(req->time_cfg_udp_port, CFG_GLOBAL_PARAM_DATA_0_ROCEE_UDP_PORT_M, CFG_GLOBAL_PARAM_DATA_0_ROCEE_UDP_PORT_S, 0x12b7); @@ -4943,6 +4951,29 @@ static int hns_roce_v2_set_abs_fields(struct ib_qp *ibqp, return ret; } +static bool check_qp_timeout_cfg_range(struct hns_roce_dev *hr_dev, u8 *timeout) +{ +#define QP_TIMEOUT_MAX_HIP08 20 +#define QP_TIMEOUT_MAX 31 + + if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08_B) { + if (*timeout > QP_TIMEOUT_MAX_HIP08) { + dev_warn(hr_dev->dev, + "Local ACK timeout shall be 0 to 20.\n"); + return false; + } + *timeout += HNS_ROCE_QP_TIMEOUT_OFFSET; + } else if (hr_dev->pci_dev->revision > PCI_REVISION_ID_HIP08_B) { + if (*timeout > QP_TIMEOUT_MAX) { + dev_warn(hr_dev->dev, + "Local ACK timeout shall be 0 to 31.\n"); + return false; + } + } + + return true; +} + static int hns_roce_v2_set_opt_fields(struct ib_qp *ibqp, const struct ib_qp_attr *attr, int attr_mask, @@ -4951,8 +4982,8 @@ static int hns_roce_v2_set_opt_fields(struct ib_qp *ibqp, { struct hns_roce_dev *hr_dev = to_hr_dev(ibqp->device); struct hns_roce_qp *hr_qp = to_hr_qp(ibqp); - struct device *dev = hr_dev->dev; int ret = 0; + u8 timeout; /* The AV component shall be modified for RoCEv2 */ if (attr_mask & IB_QP_AV) { @@ -4963,15 +4994,15 @@ static int hns_roce_v2_set_opt_fields(struct ib_qp *ibqp, } if (attr_mask & IB_QP_TIMEOUT) { - if (attr->timeout < 21) { + timeout = attr->timeout; + if (check_qp_timeout_cfg_range(hr_dev, &timeout)) { roce_set_field(context->byte_28_at_fl, V2_QPC_BYTE_28_AT_M, V2_QPC_BYTE_28_AT_S, - attr->timeout + 10); + timeout); roce_set_field(qpc_mask->byte_28_at_fl, V2_QPC_BYTE_28_AT_M, V2_QPC_BYTE_28_AT_S, 0); - } else - dev_warn(dev, "Local ACK timeout shall be 0 to 20.\n"); + } } if (attr_mask & IB_QP_RETRY_CNT) { @@ -5598,14 +5629,17 @@ static int hns_roce_v2_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period) V2_CQC_BYTE_56_CQ_MAX_CNT_M, V2_CQC_BYTE_56_CQ_MAX_CNT_S, 0); - if (cq_period * HNS_ROCE_CLOCK_ADJUST > 0xFFFF) { - dev_info(hr_dev->dev, "Config cq_period param(0x%x) out of range for modify_cq, adjusted to 65.\n", - cq_period); - cq_period = HNS_ROCE_MAX_CQ_PERIOD; + if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08_B) { + if (cq_period * HNS_ROCE_CLOCK_ADJUST > USHRT_MAX) { + dev_info(hr_dev->dev, "cq_period(%d) reached the upper limit, adjusted to 65.\n", + cq_period); + cq_period = HNS_ROCE_MAX_CQ_PERIOD; + } + cq_period *= HNS_ROCE_CLOCK_ADJUST; } roce_set_field(cq_context->byte_56_cqe_period_maxcnt, V2_CQC_BYTE_56_CQ_PERIOD_M, V2_CQC_BYTE_56_CQ_PERIOD_S, - cq_period * HNS_ROCE_CLOCK_ADJUST); + cq_period); roce_set_field(cqc_mask->byte_56_cqe_period_maxcnt, V2_CQC_BYTE_56_CQ_PERIOD_M, V2_CQC_BYTE_56_CQ_PERIOD_S, 0); @@ -6166,10 +6200,14 @@ static void hns_roce_config_eqc(struct hns_roce_dev *hr_dev, eqc = mb_buf; memset(eqc, 0, sizeof(struct hns_roce_eq_context)); - if (eq_period * HNS_ROCE_CLOCK_ADJUST > 0xFFFF) { - dev_info(hr_dev->dev, "Config eq_period param(0x%x) out of range for config_eqc, adjusted to 65.\n", - eq_period); - eq_period = HNS_ROCE_MAX_CQ_PERIOD; + eq->eq_period = eq_period; + if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08_B) { + if (eq->eq_period * HNS_ROCE_CLOCK_ADJUST > USHRT_MAX) { + dev_info(hr_dev->dev, "eq_period(%d) reached the upper limit, adjusted to 65.\n", + eq->eq_period); + eq->eq_period = HNS_ROCE_MAX_EQ_PERIOD; + } + eq->eq_period *= HNS_ROCE_CLOCK_ADJUST; } /* init eqc */ @@ -6182,7 +6220,6 @@ static void hns_roce_config_eqc(struct hns_roce_dev *hr_dev, eq->eqe_buf_pg_sz = hr_dev->caps.eqe_buf_pg_sz; eq->shift = ilog2((unsigned int)eq->entries); eq->eq_max_cnt = eq_max_cnt; - eq->eq_period = eq_period * HNS_ROCE_CLOCK_ADJUST; eq->arm_st = eq_arm_st; if (!eq->hop_num) diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.h b/drivers/infiniband/hw/hns/hns_roce_hw_v2.h index ba81aa607e1d..dad3ac0b4731 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.h +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.h @@ -37,6 +37,11 @@ #define HNS_ROCE_CLOCK_ADJUST 1000 #define HNS_ROCE_MAX_CQ_PERIOD 65 +#define HNS_ROCE_MAX_EQ_PERIOD 65 +#define HNS_ROCE_QP_TIMEOUT_OFFSET 10 + +#define HNS_ROCE_1US_CFG 999 +#define HNS_ROCE_1NS_CFG 0 #define HNS_ROCE_VF_QPC_BT_NUM 256 #define HNS_ROCE_VF_SCCC_BT_NUM 64 -- 2.25.1

1 0

[PATCH openEuler-1.0-LTS 18/28] nvme: fix incorrect behavior when BLKROSET is called by the user
by Cheng Jian 22 Apr '21

22 Apr '21

From: Sagi Grimberg <sagi(a)grimberg.me> mainline inclusion from mainline-5.10 commit 65c5a055b0d567b7e7639d942c0605da9cc54c5e category: bugfix bugzilla: NA CVE: NA ------------------------------------------------- The offending commit breaks BLKROSET ioctl because a device revalidation will blindly override BLKROSET setting. Hence, we remove the disk rw setting in case NVME_NS_ATTR_RO is cleared from by the controller. Fixes: 1293477f4f32 ("nvme: set gendisk read only based on nsattr") Signed-off-by: Sagi Grimberg <sagi(a)grimberg.me> Signed-off-by: Christoph Hellwig <hch(a)lst.de> Signed-off-by: Wenchao Hao <haowenchao(a)huawei.com> Reviewed-by: Miaohe Lin <linmiaohe(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Signed-off-by: Cheng Jian <cj.chengjian(a)huawei.com> --- drivers/nvme/host/core.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 8404d3275ce0..cf838c4d032b 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -1625,8 +1625,6 @@ static void nvme_update_disk_info(struct gendisk *disk, if (id->nsattr & (1 << 0)) set_disk_ro(disk, true); - else - set_disk_ro(disk, false); blk_mq_unfreeze_queue(disk->queue); } -- 2.25.1

1 0

[PATCH kernel-4.19 00/13] backport linux-4.19.188
by Yang Yingliang 20 Apr '21

20 Apr '21

Arnaldo Carvalho de Melo (1): perf map: Tighten snprintf() string precision to pass gcc check on some 32-bit arches Arnd Bergmann (1): drm/imx: imx-ldb: fix out of bounds array access warning Bob Peterson (1): gfs2: report "already frozen/thawed" errors Dmitry Osipenko (1): drm/tegra: dc: Don't set PLL clock to 0Hz Florian Fainelli (1): net: phy: broadcom: Only advertise EEE for supported modes Florian Westphal (1): netfilter: x_tables: fix compat match/target pad out-of-bound write Greg Kroah-Hartman (2): staging: m57621-mmc: delete driver from the tree. Linux 4.19.188 Juergen Gross (1): xen/events: fix setting irq affinity Saravana Kannan (1): driver core: Fix locking bug in deferred_probe_timeout_work_func() Suzuki K Poulose (2): KVM: arm64: Hide system instruction access to Trace registers KVM: arm64: Disable guest access to trace filter controls Zihao Yu (1): riscv,entry: fix misaligned base for excp_vect_table Makefile | 2 +- arch/arm64/include/asm/kvm_arm.h | 1 + arch/arm64/kernel/cpufeature.c | 1 - arch/arm64/kvm/debug.c | 2 + arch/riscv/kernel/entry.S | 1 + drivers/base/dd.c | 8 +- drivers/gpu/drm/imx/imx-ldb.c | 10 + drivers/gpu/drm/tegra/dc.c | 10 +- drivers/net/phy/bcm-phy-lib.c | 11 +- drivers/staging/Kconfig | 2 - drivers/staging/Makefile | 1 - drivers/staging/mt7621-mmc/Kconfig | 16 - drivers/staging/mt7621-mmc/Makefile | 42 - drivers/staging/mt7621-mmc/TODO | 8 - drivers/staging/mt7621-mmc/board.h | 63 - drivers/staging/mt7621-mmc/dbg.c | 307 --- drivers/staging/mt7621-mmc/dbg.h | 149 -- drivers/staging/mt7621-mmc/mt6575_sd.h | 488 ----- drivers/staging/mt7621-mmc/sd.c | 2392 ------------------------ drivers/xen/events/events_base.c | 4 +- fs/gfs2/super.c | 10 +- net/ipv4/netfilter/arp_tables.c | 2 + net/ipv4/netfilter/ip_tables.c | 2 + net/ipv6/netfilter/ip6_tables.c | 2 + net/netfilter/x_tables.c | 10 +- tools/perf/util/map.c | 7 +- 26 files changed, 52 insertions(+), 3499 deletions(-) delete mode 100644 drivers/staging/mt7621-mmc/Kconfig delete mode 100644 drivers/staging/mt7621-mmc/Makefile delete mode 100644 drivers/staging/mt7621-mmc/TODO delete mode 100644 drivers/staging/mt7621-mmc/board.h delete mode 100644 drivers/staging/mt7621-mmc/dbg.c delete mode 100644 drivers/staging/mt7621-mmc/dbg.h delete mode 100644 drivers/staging/mt7621-mmc/mt6575_sd.h delete mode 100644 drivers/staging/mt7621-mmc/sd.c -- 2.25.1

1 2

[PATCH kernel-4.19 01/36] iommu: Change tlb_range_add to iotlb_range_add and tlb_sync to iotlb_sync
by Yang Yingliang 20 Apr '21

20 Apr '21

From: tom <murphyt7(a)tcd.ie> mainline inclusion from mainline-v5.0-rc1 commit 51eb78098ab79bba8b1df24da2304e61deb74629 category: bugfix bugzilla: 21306 CVE: NA ------------------------------------------------------------------------- Someone forgot to update this comment. Signed-off-by: Tom Murphy <murphyt7(a)tcd.ie> Signed-off-by: Joerg Roedel <jroedel(a)suse.de> Signed-off-by: Zhen Lei <thunder.leizhen(a)huawei.com> Reviewed-by: Hanjun Guo <guohanjun(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- include/linux/iommu.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 4907aae83b847..bc8847c878228 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -269,8 +269,8 @@ struct iommu_sva_param { * @map: map a physically contiguous memory region to an iommu domain * @unmap: unmap a physically contiguous memory region from an iommu domain * @flush_tlb_all: Synchronously flush all hardware TLBs for this domain - * @tlb_range_add: Add a given iova range to the flush queue for this domain - * @tlb_sync: Flush all queued ranges from the hardware TLBs and empty flush + * @iotlb_range_add: Add a given iova range to the flush queue for this domain + * @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty flush * queue * @iova_to_phys: translate iova to physical address * @add_device: add device to iommu grouping -- 2.25.1

1 16

[PATCH 42/48] locking/rwsem: Make handoff writer optimistically spin on owner
by Yang Yingliang 20 Apr '21

20 Apr '21

From: Waiman Long <longman(a)redhat.com> When the handoff bit is set by a writer, no other tasks other than the setting writer itself is allowed to acquire the lock. If the to-be-handoff'ed writer goes to sleep, there will be a wakeup latency period where the lock is free, but no one can acquire it. That is less than ideal. To reduce that latency, the handoff writer will now optimistically spin on the owner if it happens to be a on-cpu writer. It will spin until it releases the lock and the to-be-handoff'ed writer can then acquire the lock immediately without any delay. Of course, if the owner is not a on-cpu writer, the to-be-handoff'ed writer will have to sleep anyway. The optimistic spinning code is also modified to not stop spinning when the handoff bit is set. This will prevent an occasional setting of handoff bit from causing a bunch of optimistic spinners from entering into the wait queue causing significant reduction in throughput. On a 1-socket 22-core 44-thread Skylake system, the AIM7 shared_memory workload was run with 7000 users. The throughput (jobs/min) of the following kernels were as follows: 1) 5.2-rc6 - 8,092,486 2) 5.2-rc6 + tip's rwsem patches - 7,567,568 3) 5.2-rc6 + tip's rwsem patches + this patch - 7,954,545 Using perf-record(1), the %cpu time used by rwsem_down_write_slowpath(), rwsem_down_write_failed() and their callees for the 3 kernels were 1.70%, 5.46% and 2.08% respectively. Signed-off-by: Waiman Long <longman(a)redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> Cc: x86(a)kernel.org Cc: Ingo Molnar <mingo(a)redhat.com> Cc: Will Deacon <will.deacon(a)arm.com> Cc: huang ying <huang.ying.caritas(a)gmail.com> Cc: Tim Chen <tim.c.chen(a)linux.intel.com> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: Borislav Petkov <bp(a)alien8.de> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Davidlohr Bueso <dave(a)stgolabs.net> Cc: "H. Peter Anvin" <hpa(a)zytor.com> Link: https://lkml.kernel.org/r/20190625143913.24154-1-longman@redhat.com --- kernel/locking/rwsem.c | 32 ++++++++++++++++++++++++++------ 1 file changed, 26 insertions(+), 6 deletions(-) diff --git a/kernel/locking/rwsem.c b/kernel/locking/rwsem.c index bd0f0d05724c..354238a08b7a 100644 --- a/kernel/locking/rwsem.c +++ b/kernel/locking/rwsem.c @@ -724,11 +724,12 @@ rwsem_spin_on_owner(struct rw_semaphore *sem, unsigned long nonspinnable) rcu_read_lock(); for (;;) { - if (atomic_long_read(&sem->count) & RWSEM_FLAG_HANDOFF) { - state = OWNER_NONSPINNABLE; - break; - } - + /* + * When a waiting writer set the handoff flag, it may spin + * on the owner as well. Once that writer acquires the lock, + * we can spin on it. So we don't need to quit even when the + * handoff bit is set. + */ new = rwsem_owner_flags(sem, &new_flags); if ((new != owner) || (new_flags != flags)) { state = rwsem_owner_state(new, new_flags, nonspinnable); @@ -974,6 +975,13 @@ static inline bool rwsem_reader_phase_trylock(struct rw_semaphore *sem, { return false; } + +static inline int +rwsem_spin_on_owner(struct rw_semaphore *sem, unsigned long nonspinnable) +{ + return 0; +} +#define OWNER_NULL 1 #endif /* @@ -1206,6 +1214,18 @@ rwsem_down_write_slowpath(struct rw_semaphore *sem, int state) raw_spin_unlock_irq(&sem->wait_lock); + /* + * After setting the handoff bit and failing to acquire + * the lock, attempt to spin on owner to accelerate lock + * transfer. If the previous owner is a on-cpu writer and it + * has just released the lock, OWNER_NULL will be returned. + * In this case, we attempt to acquire the lock again + * without sleeping. + */ + if ((wstate == WRITER_HANDOFF) && + (rwsem_spin_on_owner(sem, 0) == OWNER_NULL)) + goto trylock_again; + /* Block until there are no active lockers. */ for (;;) { if (signal_pending_state(state, current)) @@ -1240,7 +1260,7 @@ rwsem_down_write_slowpath(struct rw_semaphore *sem, int state) break; } } - +trylock_again: raw_spin_lock_irq(&sem->wait_lock); } __set_current_state(TASK_RUNNING); -- 2.29.2.366.gb291b0a628.dirty

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openEuler kernel Meetup 4月9号北京站圆满结束
by Xie XiuQi 17 Apr '21

17 Apr '21

openEuler kernel Meetup 4月9号北京站圆满结束 openEuler kernel SIG组于2021年4月9日在北京成功举办了kernel meetup。本次活动云集了来自华为、麒麟、PingCAP、申威、飞腾、万里红、armChina、兆芯、美团、复旦的行业领袖、业界资深专家、高校教授、社区maintainer、开发者，吸引了现场30人+，线上约300人参与。会上就内核技术、SIG组后续运作规划进行了充分研讨，收集了各厂商的诉求并进行答疑，对SIG组后续的工作开展和技术合作有着重大意义。来自麒麟软件的孙立明老师，对ARM64 KVM 虚拟化架构做了介绍，增进了大家对ARM64 架构虚拟化的理解。麒麟软件的郭皓老师提出了openEuler kernel 支持PREEMPT_RT 的想法和思路。期待openEuler 具备更高的实时性，促进其在嵌入式领域的应用。孙立明老师郭皓老师来自兆芯的张伟老师，对兆芯CPU的演进、特性，以及兆芯补丁合入openEuler kernel 的过程做了介绍。目前兆芯的补丁已经合入openEuler 4.19 内核，预计6 月底发布的 openEuler 20.03 LTS SP2 将支持兆芯CPU。兆芯与openEuler社区的紧密合作促成了 openEuler 对兆芯CPU的快速支持，张伟老师对此表示了称赞。张伟老师来自申威的崔巍老师就处理器接口、虚拟化支持、安全增强等话题与飞腾、兆芯专家进行了现场交流，并表达了积极参与openEuler 的愿望，期待openEuler 尽快支持申威全自主指令集架构，促进openEuler社区和申威生态的共同繁荣。崔巍老师来自华为的缪勰介绍了华为针对SCM介质研发的文件系统。该文件系统的原理基于华为OS内核实验室主任陈海波老师的论文Soft Updates Made Simple and Fast on Non-volatile Memory <https://www.usenix.org/system/files/conference/atc17/atc17-dong.pdf> 采用软更新（soft-update) 提供一致性保证，采用哈希表目录结构，消除循环依赖，提供的字节级读写能力显著降低了SoupFS的复杂性等技术。性能相比业界其他SCM 文件系统有显著的提升。来自华为的杨基鸿，介绍了性能调优的常用方法、工具和思路，并通过实际案例讲解工具的应用及性能分析的思路。线上与会同学表达了对TOP-down性能分析工具的强烈兴趣，我们后续会通过专题分享介绍更多技术细节。杨基鸿来自复旦大学计算机学院的张亮教授，针对如何推动高校参与openEuler提出了建设性意见，我们后续也会持续开展面向高校的交流合作活动。张亮教授 openEuler kernel SIG 的Maintainer 谢秀奇介绍了kernel SIG一年多以来的进展以及后续的运作、规划等。与会专家老师进行了充分的研讨，提出了在kernel SIG 建立committer 机制的想法，以Committer 为核心对openEuler 内核进行规划、开发和治理。谢秀奇本次meetup的成功举办，对kernel SIG的后续工作和发展有重大意义。期待各厂商、各单位、各开发者在openEuler 开源社区这个大平台下，共建、共享、共治，让 openEuler kernel走进千行百业，成为信息产业的基石。 openEuler kernel SIG openEuler kernel 源代码仓库： https://gitee.com/openeuler/kernel 欢迎大家多多star、fork，多多参与社区开发，多多贡献补丁。关于贡献补丁请参考：如何参与 openEuler 内核开发 <https://mp.weixin.qq.com/s/a42a5VfayFeJgWitqbI8Qw> openEuler kernel SIG 微信技术交流群请扫描下方二维码添加小助手微信，备注“交流群”或“技术交流”，加入 openEuler kernel SIG 技术交流群。

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【Meeting Notice】openEuler kernel 技术分享第三期 & 双周例会 Time: 2021-04-16 14:00-18:00
by Meeting Book 16 Apr '21

16 Apr '21

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[PATCH openEuler-1.0-LTS] config/arm64: fix kabi by disable CONFIG_NVME_MULTIPATH
by Cheng Jian 15 Apr '21

15 Apr '21

hulk inclusion category: bugfix bugzilla: https://bugzilla.openeuler.org/show_bug.cgi?id=20 CVE: NA ------------------------------------------------- The config CONFIG_NVME_MULTIPATH causes Kabi broken, so turn this feature off. This reverts commit 3aa30a87da112ec78cbd2a3cc543bbafc72be76c. Signed-off-by: Cheng Jian <cj.chengjian(a)huawei.com> --- arch/arm64/configs/openeuler_defconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/configs/openeuler_defconfig b/arch/arm64/configs/openeuler_defconfig index fc7065339051..89dec8e1954f 100644 --- a/arch/arm64/configs/openeuler_defconfig +++ b/arch/arm64/configs/openeuler_defconfig @@ -1960,7 +1960,7 @@ CONFIG_BLK_DEV_RBD=m # CONFIG_NVME_CORE=m CONFIG_BLK_DEV_NVME=m -CONFIG_NVME_MULTIPATH=y +# CONFIG_NVME_MULTIPATH is not set CONFIG_NVME_FABRICS=m CONFIG_NVME_RDMA=m CONFIG_NVME_FC=m -- 2.25.1

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[PATCH openEuler-1.0-LTS 0/5] errata and bugfix for openEuler 20.03
by Cheng Jian 15 Apr '21

15 Apr '21

errata and bugfix for openEuler 20.03 *** BLURB HERE *** Cheng Jian (1): config/x86: enable SHRINK_PAGECACHE Kai Shen (1): arm64: errata: add option to disable cache readunique prefetch on 1620 Xie XiuQi (2): arm64: errata: fix kabi changed for cpu_errata arm64: errata: enable HISILICON_ERRATUM_HIP08_RU_PREFETCH Zheng Zengkai (1): arm64: Add config switch and kernel parameter for CPU0 hotplug .../admin-guide/kernel-parameters.txt | 8 +++ arch/arm64/Kconfig | 46 +++++++++++++ arch/arm64/configs/openeuler_defconfig | 2 + arch/arm64/kernel/cpu_errata.c | 67 +++++++++++++++++++ arch/arm64/kernel/setup.c | 18 ++++- arch/x86/configs/hulk_defconfig | 1 + arch/x86/configs/openeuler_defconfig | 2 +- 7 files changed, 142 insertions(+), 2 deletions(-) -- 2.25.1

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[PATCH openEuler-1.0-LTS 00/12] iommu/arm-smmu-v3: Reduce
by Cheng Jian 15 Apr '21

15 Apr '21

v2 --> v3: 1. Discard the patches(support gather) that affects the kabi. These patches are not critical to performance optimization. ---> openeuler_defconfig, 11 SSD non-strict 1313.4 (discard gather patches) 1314.7 1326.6 (all, contain gather patches) 1363.6 strict (after: all) 1357.3 1355.8 1311.1 strict (after: discard) 1248.7 1188.7 1218.5 strict (before) 716.7 728.9 721.6 v1 --> v2: 1. Fix compile error: drivers/uacce/dummy_drv/dummy_wd_v2.c:202:11: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types] .unmap = dummy_wd2_iommu_unmap, 2. Add a new fix: 862c3715de8f ("iommu: Switch gather->end to the inclusive end") 3. Leave member iotlb_range_add in "struct iommu_ops" as a placeholder v1: For more information, please refer: http://openeuler.huawei.com/bugzilla/show_bug.cgi?id=21306 Rob Herring (1): iommu: Allow io-pgtable to be used outside of drivers/iommu/ Tom Murphy (1): iommu: Fix flush_tlb_all typo Will Deacon (9): iommu/io-pgtable: Replace IO_PGTABLE_QUIRK_NO_DMA with specific flag iommu/arm-smmu-v3: Increase maximum size of queues iommu/io-pgtable-arm: Remove redundant call to io_pgtable_tlb_sync() iommu/io-pgtable: Rename iommu_gather_ops to iommu_flush_ops iommu/arm-smmu-v3: Separate s/w and h/w views of prod and cons indexes iommu/arm-smmu-v3: Drop unused 'q' argument from Q_OVF macro iommu/arm-smmu-v3: Move low-level queue fields out of arm_smmu_queue iommu/arm-smmu-v3: Operate directly on low-level queue where possible iommu/arm-smmu-v3: Reduce contention during command-queue insertion tom (1): iommu: Change tlb_range_add to iotlb_range_add and tlb_sync to iotlb_sync drivers/iommu/arm-smmu-v3.c | 853 +++++++++++++----- drivers/iommu/arm-smmu.c | 14 +- drivers/iommu/io-pgtable-arm-v7s.c | 16 +- drivers/iommu/io-pgtable-arm.c | 24 +- drivers/iommu/io-pgtable.c | 5 +- drivers/iommu/iommu-pasid-table.h | 2 +- drivers/iommu/ipmmu-vmsa.c | 8 +- drivers/iommu/msm_iommu.c | 6 +- drivers/iommu/mtk_iommu.c | 4 +- drivers/iommu/mtk_iommu.h | 3 +- drivers/iommu/qcom_iommu.c | 6 +- {drivers/iommu => include/linux}/io-pgtable.h | 17 +- include/linux/iommu.h | 6 +- 13 files changed, 685 insertions(+), 279 deletions(-) rename {drivers/iommu => include/linux}/io-pgtable.h (93%) -- 2.25.1

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[PATCH openEuler-1.0-LTS v2 000/771] io_uring support
by Cheng Jian 15 Apr '21

15 Apr '21

io_uring support Aleix Roca Nonell (1): io_uring: fix manual setup of iov_iter for fixed buffers Arnd Bergmann (2): io_uring: fix big-endian compat signal mask handling io_uring: use __kernel_timespec in timeout ABI Bart Van Assche (1): percpu-refcount: Introduce percpu_ref_resurrect() Bijan Mottahedeh (13): io_uring: clear req->result always before issuing a read/write request io_uring: process requests completed with -EAGAIN on poll list io_uring: use proper references for fallback_req locking io_uring: don't use kiocb.private to store buf_index io_uring: add io_statx structure statx: allow system call to be invoked from io_uring io_uring: call statx directly statx: hide interfaces no longer used by io_uring io_uring: validate the full range of provided buffers for access io_uring: add wrappers for memory accounting io_uring: rename ctx->account_mem field io_uring: report pinned memory usage io_uring: separate reporting of ring pages from registered pages Bob Liu (2): io_uring: clean up io_uring_cancel_files() io_uring: introduce req_need_defer() Brian Gianforcaro (1): io_uring: fix stale comment and a few typos Christoph Hellwig (2): fs: add an iopoll method to struct file_operations io_uring: add fsync support Chucheng Luo (1): io_uring: fix missing 'return' in comment Colin Ian King (3): io_uring: fix shadowed variable ret return code being not checked io_uring: remove redundant variable pointer nxt and io_wq_assign_next call io_uring: Fix sizeof() mismatch Damien Le Moal (5): aio: Comment use of IOCB_FLAG_IOPRIO aio flag block: Introduce get_current_ioprio() aio: Fix fallback I/O priority value block: prevent merging of requests with different priorities block: Initialize BIO I/O priority early Dan Carpenter (3): io-wq: remove extra space characters io_uring: remove unnecessary NULL checks io_uring: fix a use after free in io_async_task_func() Daniel Xu (1): io_uring: increase IORING_MAX_ENTRIES to 32K Daniele Albano (1): io_uring: always allow drain/link/hardlink/async sqe flags Deepa Dinamani (5): signal: Add set_user_sigmask() signal: Add restore_user_sigmask() ppoll: use __kernel_timespec pselect6: use __kernel_timespec io_pgetevents: use __kernel_timespec Denis Efremov (1): io_uring: use kvfree() in io_sqe_buffer_register() Dmitrii Dolgov (1): io_uring: add set of tracing events Dmitry Vyukov (1): io_uring: fix sq array offset calculation Eric Biggers (1): io_uring: fix memory leak of UNIX domain socket inode Eric W. Biederman (2): signal/cifs: Fix cifs_put_tcp_session to call send_sig instead of force_sig signal: Allow cifs and drbd to receive their terminating signals Eugene Syromiatnikov (1): io_uring: fix compat for IORING_REGISTER_FILES_UPDATE Guoyu Huang (1): io_uring: Fix NULL pointer dereference in loop_rw_iter() Hillf Danton (6): io-wq: remove unused busy list from io_sqe io-wq: add cond_resched() to worker thread io-uring: drop completion when removing file io-uring: drop 'free_pfile' in struct io_file_put io_uring: add missing finish_wait() in io_sq_thread() io-wq: fix use-after-free in io_wq_worker_running Hristo Venev (1): io_uring: allocate the two rings together Hrvoje Zeba (1): io_uring: remove superfluous check for sqe->off in io_accept() Jackie Liu (17): io_uring: adjust smp_rmb inside io_cqring_events io_uring: use wait_event_interruptible for cq_wait conditional wait io_uring: fix io_sq_thread_stop running in front of io_sq_thread io_uring: fix KASAN use after free in io_sq_wq_submit_work io_uring: fix an issue when IOSQE_IO_LINK is inserted into defer list io_uring: fix wrong sequence setting logic io_uring: add support for link with drain io_uring: use kmemdup instead of kmalloc and memcpy io_uring: fix use-after-free of shadow_req io_uring: fix potential crash issue due to io_get_req failure io_uring: replace s->needs_lock with s->in_async io_uring: set -EINTR directly when a signal wakes up in io_cqring_wait io_uring: remove passed in 'ctx' function parameter ctx if possible io_uring: keep io_put_req only responsible for release and put req io_uring: separate the io_free_req and io_free_req_find_next interface io_uring: remove parameter ctx of io_submit_state_start io_uring: remove io_wq_current_is_worker Jann Horn (2): io_uring: use kzalloc instead of kcalloc for single-element allocations io-wq: fix handling of NUMA node IDs Jens Axboe (352): Add io_uring IO interface io_uring: support for IO polling fs: add fget_many() and fput_many() io_uring: use fget/fput_many() for file references io_uring: batch io_kiocb allocation io_uring: add support for pre-mapped user IO buffers net: split out functions related to registering inflight socket files io_uring: add file set registration io_uring: add submission polling io_uring: add io_kiocb ref count io_uring: add support for IORING_OP_POLL io_uring: allow workqueue item to handle multiple buffered requests io_uring: add a few test tools tools/io_uring: remove IOCQE_FLAG_CACHEHIT io_uring: use regular request ref counts io_uring: make io_read/write return an integer io_uring: add prepped flag io_uring: fix fget/fput handling io_uring: fix poll races io_uring: retry bulk slab allocs as single allocs io_uring: fix double free in case of fileset regitration failure io_uring: restrict IORING_SETUP_SQPOLL to root io_uring: park SQPOLL thread if it's percpu io_uring: only test SQPOLL cpu after we've verified it io_uring: drop io_file_put() 'file' argument io_uring: fix possible deadlock between io_uring_{enter,register} io_uring: fix CQ overflow condition io_uring: fail io_uring_register(2) on a dying io_uring instance io_uring: remove 'state' argument from io_{read,write} path io_uring: have submission side sqe errors post a cqe io_uring: drop req submit reference always in async punt fs: add sync_file_range() helper io_uring: add support for marking commands as draining io_uring: add support for IORING_OP_SYNC_FILE_RANGE io_uring: add support for eventfd notifications io_uring: fix failure to verify SQ_AFF cpu io_uring: remove 'ev_flags' argument tools/io_uring: fix Makefile for pthread library link tools/io_uring: sync with liburing io_uring: ensure req->file is cleared on allocation uio: make import_iovec()/compat_import_iovec() return bytes on success io_uring: punt short reads to async context io_uring: add support for sqe links io_uring: add support for sendmsg() io_uring: add support for recvmsg() io_uring: don't use iov_iter_advance() for fixed buffers io_uring: ensure ->list is initialized for poll commands io_uring: fix potential hang with polled IO io_uring: don't enter poll loop if we have CQEs pending io_uring: add need_resched() check in inner poll loop io_uring: expose single mmap capability io_uring: optimize submit_and_wait API io_uring: add io_queue_async_work() helper io_uring: limit parallelism of buffered writes io_uring: extend async work merging io_uring: make sqpoll wakeup possible with getevents io_uring: ensure poll commands clear ->sqe io_uring: use cond_resched() in sqthread io_uring: IORING_OP_TIMEOUT support io_uring: correctly handle non ->{read,write}_iter() file_operations io_uring: make CQ ring wakeups be more efficient io_uring: only flush workqueues on fileset removal io_uring: fix sequence logic for timeout requests io_uring: fix up O_NONBLOCK handling for sockets io_uring: revert "io_uring: optimize submit_and_wait API" io_uring: used cached copies of sq->dropped and cq->overflow io_uring: fix bad inflight accounting for SETUP_IOPOLL|SETUP_SQTHREAD io_uring: don't touch ctx in setup after ring fd install io_uring: run dependent links inline if possible io_uring: allow sparse fixed file sets io_uring: add support for IORING_REGISTER_FILES_UPDATE io_uring: allow application controlled CQ ring size io_uring: add support for absolute timeouts io_uring: add support for canceling timeout requests io-wq: small threadpool implementation for io_uring io_uring: replace workqueue usage with io-wq io_uring: io_uring: add support for async work inheriting files net: add __sys_accept4_file() helper io_uring: add support for IORING_OP_ACCEPT io_uring: protect fixed file indexing with array_index_nospec() io_uring: support for larger fixed file sets io_uring: fix race with canceling timeouts io_uring: io_wq_create() returns an error pointer, not NULL io_uring: ensure we clear io_kiocb->result before each issue io_uring: support for generic async request cancel io_uring: add completion trace event io-wq: use proper nesting IRQ disabling spinlocks for cancel io_uring: enable optimized link handling for IORING_OP_POLL_ADD io_uring: fixup a few spots where link failure isn't flagged io_uring: kill dead REQ_F_LINK_DONE flag io_uring: abstract out io_async_cancel_one() helper io_uring: add support for linked SQE timeouts io_uring: make io_cqring_events() take 'ctx' as argument io_uring: pass in io_kiocb to fill/add CQ handlers io_uring: add support for backlogged CQ ring io-wq: io_wqe_run_queue() doesn't need to use list_empty_careful() io-wq: add support for bounded vs unbunded work io_uring: properly mark async work as bounded vs unbounded io_uring: reduce/pack size of io_ring_ctx io_uring: fix error clear of ->file_table in io_sqe_files_register() io_uring: convert accept4() -ERESTARTSYS into -EINTR io_uring: provide fallback request for OOM situations io_uring: make ASYNC_CANCEL work with poll and timeout io_uring: flag SQPOLL busy condition to userspace io_uring: don't do flush cancel under inflight_lock io_uring: fix -ENOENT issue with linked timer with short timeout io_uring: make timeout sequence == 0 mean no sequence io_uring: use correct "is IO worker" helper io_uring: fix potential deadlock in io_poll_wake() io_uring: check for validity of ->rings in teardown io_wq: add get/put_work handlers to io_wq_create() io-wq: ensure we have a stable view of ->cur_work for cancellations io_uring: ensure registered buffer import returns the IO length io-wq: ensure free/busy list browsing see all items io-wq: remove now redundant struct io_wq_nulls_list io_uring: make POLL_ADD/POLL_REMOVE scale better io_uring: io_async_cancel() should pass in 'nxt' request pointer io_uring: cleanup return values from the queueing functions io_uring: make io_double_put_req() use normal completion path io_uring: make req->timeout be dynamically allocated io_uring: fix sequencing issues with linked timeouts io_uring: remove dead REQ_F_SEQ_PREV flag io_uring: correct poll cancel and linked timeout expiration completion io_uring: request cancellations should break links io-wq: wait for io_wq_create() to setup necessary workers io_uring: io_fail_links() should only consider first linked timeout io_uring: io_allocate_scq_urings() should return a sane state io_uring: allow finding next link independent of req reference count io_uring: close lookup gap for dependent next work io_uring: improve trace_io_uring_defer() trace point io_uring: only return -EBUSY for submit on non-flushed backlog net: add __sys_connect_file() helper io_uring: add support for IORING_OP_CONNECT io-wq: have io_wq_create() take a 'data' argument io_uring: async workers should inherit the user creds io-wq: shrink io_wq_work a bit io_uring: make poll->wait dynamically allocated io_uring: fix missing kmap() declaration on powerpc io_uring: use current task creds instead of allocating a new one io_uring: transform send/recvmsg() -ERESTARTSYS to -EINTR io_uring: add general async offload context io_uring: ensure async punted read/write requests copy iovec net: separate out the msghdr copy from ___sys_{send,recv}msg() net: disallow ancillary data for __sys_{send,recv}msg_file() io_uring: ensure async punted sendmsg/recvmsg requests copy data io_uring: ensure async punted connect requests copy data io_uring: mark us with IORING_FEAT_SUBMIT_STABLE io_uring: handle connect -EINPROGRESS like -EAGAIN io_uring: allow IO_SQE_* flags on IORING_OP_TIMEOUT io_uring: ensure deferred timeouts copy necessary data io-wq: clear node->next on list deletion io_uring: use hash table for poll command lookups io_uring: allow unbreakable links io-wq: remove worker->wait waitqueue io-wq: briefly spin for new work after finishing work io_uring: sqthread should grab ctx->uring_lock for submissions io_uring: deferred send/recvmsg should assign iov io_uring: don't dynamically allocate poll data io_uring: run next sqe inline if possible io_uring: only hash regular files for async work execution io_uring: add sockets to list of files that support non-blocking issue io_uring: ensure we return -EINVAL on unknown opcode io_uring: fix sporadic -EFAULT from IORING_OP_RECVMSG io-wq: re-add io_wq_current_is_worker() io_uring: fix pre-prepped issue with force_nonblock == true io_uring: remove 'sqe' parameter to the OP helpers that take it io_uring: any deferred command must have stable sqe data io_uring: make IORING_POLL_ADD and IORING_POLL_REMOVE deferrable io_uring: make IORING_OP_CANCEL_ASYNC deferrable io_uring: make IORING_OP_TIMEOUT_REMOVE deferrable io_uring: read opcode and user_data from SQE exactly once io_uring: warn about unhandled opcode io_uring: io_wq_submit_work() should not touch req->rw io_uring: use u64_to_user_ptr() consistently io_uring: add and use struct io_rw for read/writes io_uring: move all prep state for IORING_OP_CONNECT to prep handler io_uring: move all prep state for IORING_OP_{SEND,RECV}_MGS to prep handler io_uring: read 'count' for IORING_OP_TIMEOUT in prep handler io_uring: standardize the prep methods io_uring: pass in 'sqe' to the prep handlers io_uring: remove punt of short reads to async context io_uring: don't setup async context for read/write fixed io-wq: cancel work if we fail getting a mm reference io_uring: be consistent in assigning next work from handler io_uring: ensure workqueue offload grabs ring mutex for poll list io_uring: only allow submit from owning task Revert "io_uring: only allow submit from owning task" io_uring: don't cancel all work on process exit io_uring: add support for fallocate() fs: make build_open_flags() available internally io_uring: add support for IORING_OP_OPENAT io-wq: add support for uncancellable work io_uring: add support for IORING_OP_CLOSE io_uring: avoid ring quiesce for fixed file set unregister and update fs: make two stat prep helpers available io_uring: add support for IORING_OP_STATX io-wq: support concurrent non-blocking work io_uring: add IOSQE_ASYNC io_uring: remove two unnecessary function declarations io_uring: add lookup table for various opcode needs io_uring: split overflow state into SQ and CQ side io_uring: improve poll completion performance io_uring: add non-vectored read/write commands io_uring: allow use of offset == -1 to mean file position io_uring: add IORING_OP_FADVISE mm: make do_madvise() available internally io_uring: add IORING_OP_MADVISE io_uring: wrap multi-req freeing in struct req_batch io_uring: extend batch freeing to cover more cases io_uring: add support for IORING_SETUP_CLAMP io_uring: add support for send(2) and recv(2) io_uring: file set registration should use interruptible waits io_uring: change io_ring_ctx bool fields into bit fields io_uring: enable option to only trigger eventfd for async completions io_uring: remove 'fname' from io_open structure io_uring: add opcode to issue trace event io_uring: account fixed file references correctly in batch io_uring: add support for probing opcodes io_uring: file switch work needs to get flushed on exit io_uring: don't attempt to copy iovec for READ/WRITE io-wq: make the io_wq ref counted io_uring/io-wq: don't use static creds/mm assignments io_uring: allow registering credentials io_uring: support using a registered personality for commands io_uring: fix linked command file table usage eventpoll: abstract out epoll_ctl() handler eventpoll: support non-blocking do_epoll_ctl() calls io_uring: add support for epoll_ctl(2) io_uring: add ->show_fdinfo() for the io_uring file descriptor io_uring: prevent potential eventfd recursion on poll io_uring: use the proper helpers for io_send/recv io_uring: don't map read/write iovec potentially twice io_uring: fix sporadic double CQE entry for close io_uring: punt even fadvise() WILLNEED to async context io_uring: spin for sq thread to idle on shutdown io_uring: cleanup fixed file data table references io_uring: statx/openat/openat2 don't support fixed files io_uring: retry raw bdev writes if we hit -EOPNOTSUPP io-wq: add support for inheriting ->fs io_uring: grab ->fs as part of async preparation io_uring: allow AT_FDCWD for non-file openat/openat2/statx io-wq: make io_wqe_cancel_work() take a match handler io-wq: add io_wq_cancel_pid() to cancel based on a specific pid io_uring: cancel pending async work if task exits io_uring: retain sockaddr_storage across send/recvmsg async punt io-wq: don't call kXalloc_node() with non-online node io_uring: prune request from overflow list on flush io_uring: handle multiple personalities in link chains io_uring: fix personality idr leak io-wq: remove spin-for-work optimization io-wq: ensure work->task_pid is cleared on init io_uring: pick up link work on submit reference drop io_uring: import_single_range() returns 0/-ERROR io_uring: drop file set ref put/get on switch io_uring: fix 32-bit compatability with sendmsg/recvmsg io_uring: free fixed_file_data after RCU grace period io_uring: ensure RCU callback ordering with rcu_barrier() io_uring: make sure openat/openat2 honor rlimit nofile io_uring: make sure accept honor rlimit nofile io_uring: consider any io_read/write -EAGAIN as final io_uring: io_accept() should hold on to submit reference on retry io_uring: store io_kiocb in wait->private io_uring: add per-task callback handler io_uring: mark requests that we can do poll async in io_op_defs io_uring: use poll driven retry for files that support it io_uring: buffer registration infrastructure io_uring: add IORING_OP_PROVIDE_BUFFERS io_uring: support buffer selection for OP_READ and OP_RECV io_uring: add IOSQE_BUFFER_SELECT support for IORING_OP_READV net: abstract out normal and compat msghdr import io_uring: add IOSQE_BUFFER_SELECT support for IORING_OP_RECVMSG io_uring: provide means of removing buffers io_uring: add end-of-bits marker and build time verify it io_uring: dual license io_uring.h uapi header io_uring: fix truncated async read/readv and write/writev retry io_uring: honor original task RLIMIT_FSIZE io_uring: retry poll if we got woken with non-matching mask io_uring: grab task reference for poll requests io_uring: use io-wq manager as backup task if task is exiting io_uring: remove bogus RLIMIT_NOFILE check in file registration io_uring: ensure openat sets O_LARGEFILE if needed io_uring: punt final io_ring_ctx wait-and-free to workqueue io_uring: correct O_NONBLOCK check for splice punt io_uring: check for need to re-wait in polled async handling io_uring: io_async_task_func() should check and honor cancelation io_uring: only post events in io_poll_remove_all() if we completed some io_uring: statx must grab the file table for valid fd io_uring: enable poll retry for any file with ->read_iter / ->write_iter io_uring: only force async punt if poll based retry can't handle it io_uring: don't use 'fd' for openat/openat2/statx io_uring: polled fixed file must go through free iteration io_uring: initialize ctx->sqo_wait earlier io_uring: remove dead check in io_splice() io_uring: cancel work if task_work_add() fails io_uring: don't add non-IO requests to iopoll pending list io_uring: remove 'fd is io_uring' from close path io_uring: name sq thread and ref completions io_uring: batch reap of dead file registrations io_uring: allow POLL_ADD with double poll_wait() users io_uring: file registration list and lock optimization io_uring: cleanup io_poll_remove_one() logic io_uring: async task poll trigger cleanup io_uring: disallow close of ring itself io_uring: re-set iov base/len for buffer select retry io_uring: allow O_NONBLOCK async retry io_uring: acquire 'mm' for task_work for SQPOLL io_uring: reap poll completions while waiting for refs to drop on exit io_uring: use signal based task_work running io_uring: fix regression with always ignoring signals in io_cqring_wait() io_uring: account user memory freed when exit has been queued io_uring: ensure double poll additions work with both request types io_uring: use TWA_SIGNAL for task_work uncondtionally io_uring: hold 'ctx' reference around task_work queue + execute io_uring: clear req->result on IOPOLL re-issue io_uring: fix IOPOLL -EAGAIN retries io_uring: always delete double poll wait entry on match io_uring: fix potential ABBA deadlock in ->show_fdinfo() io_uring: use type appropriate io_kiocb handler for double poll io_uring: round-up cq size before comparing with rounded sq size io_uring: remove dead 'ctx' argument and move forward declaration io_uring: don't touch 'ctx' after installing file descriptor io_uring: account locked memory before potential error case io_uring: fix imbalanced sqo_mm accounting io_uring: stash ctx task reference for SQPOLL io_uring: ensure consistent view of original task ->mm from SQPOLL io_uring: allow non-fixed files with SQPOLL io_uring: fail poll arm on queue proc failure io_uring: sanitize double poll handling io_uring: ensure open/openat2 name is cleaned on cancelation io_uring: fix error path cleanup in io_sqe_files_register() io_uring: make ctx cancel on exit targeted to actual ctx io_uring: fix SQPOLL IORING_OP_CLOSE cancelation state io_uring: ignore double poll add on the same waitqueue head io_uring: clean up io_kill_linked_timeout() locking io_uring: add missing REQ_F_COMP_LOCKED for nested requests io_uring: provide generic io_req_complete() helper io_uring: add 'io_comp_state' to struct io_submit_state io_uring: pass down completion state on the issue side io_uring: pass in completion state to appropriate issue side handlers io_uring: enable READ/WRITE to use deferred completions io_uring: use task_work for links if possible io_uring: abstract out task work running io_uring: use new io_req_task_work_add() helper throughout io_uring: only call kfree() for a non-zero pointer io_uring: get rid of __req_need_defer() io_uring: enable lookup of links holding inflight files io_uring: fix recursive completion locking on oveflow flush io_uring: always plug for any number of IOs io_uring: find and cancel head link async work on files exit io_uring: don't use poll handler if file can't be nonblocking read/written io_uring: don't recurse on tsk->sighand->siglock with signalfd io_uring: defer file table grabbing request cleanup for locked requests Jiufei Xue (5): io_uring: check file O_NONBLOCK state for accept io_uring: change the poll type to be 32-bits io_uring: use EPOLLEXCLUSIVE flag to aoid thundering herd type behavior io_uring: fix removing the wrong file in __io_sqe_files_update() io_uring: set table->files[i] to NULL when io_sqe_file_register failed Joseph Qi (1): io_uring: fix shift-out-of-bounds when round up cq size LimingWu (1): io_uring: fix a typo in a comment Lukas Bulwahn (1): io_uring: make spdxcheck.py happy Marcelo Diop-Gonzalez (1): io_uring: flush timeouts that should already have expired Mark Rutland (3): io_uring: fix SQPOLL cpu validation io_uring: free allocated io_memory once io_uring: avoid page allocation warnings Nathan Chancellor (1): io_uring: Ensure mask is initialized in io_arm_poll_handler Oleg Nesterov (6): signal: remove the wrong signal_pending() check in restore_user_sigmask() signal: simplify set_user_sigmask/restore_user_sigmask select: change do_poll() to return -ERESTARTNOHAND rather than -EINTR select: shift restore_saved_sigmask_unless() into poll_select_copy_remaining() task_work_run: don't take ->pi_lock unconditionally task_work: teach task_work_add() to do signal_wake_up() Pavel Begunkov (249): io_uring: Fix __io_uring_register() false success io_uring: fix reversed nonblock flag for link submission io_uring: remove wait loop spurious wakeups io_uring: Fix corrupted user_data io_uring: Fix broken links with offloading io_uring: Fix race for sqes with userspace io_uring: Fix leaked shadow_req io_uring: remove index from sqe_submit io_uring: Fix mm_fault with READ/WRITE_FIXED io_uring: Merge io_submit_sqes and io_ring_submit io_uring: io_queue_link*() right after submit io_uring: allocate io_kiocb upfront io_uring: Use submit info inlined into req io_uring: use inlined struct sqe_submit io_uring: Fix getting file for timeout io_uring: Fix getting file for non-fd opcodes io_uring: break links for failed defer io_uring: remove redundant check io_uring: Fix leaking linked timeouts io_uring: Always REQ_F_FREE_SQE for allocated sqe io_uring: drain next sqe instead of shadowing io_uring: rename __io_submit_sqe() io_uring: add likely/unlikely in io_get_sqring() io_uring: remove io_free_req_find_next() io_uring: pass only !null to io_req_find_next() io_uring: simplify io_req_link_next() io_uring: only !null ptr to io_issue_sqe() io_uring: fix dead-hung for non-iter fixed rw io_uring: store timeout's sqe->off in proper place io_uring: inline struct sqe_submit io_uring: cleanup io_import_fixed() io_uring: fix error handling in io_queue_link_head io_uring: hook all linked requests via link_list io_uring: make HARDLINK imply LINK io_uring: don't wait when under-submitting io_uring: rename prev to head io_uring: move *queue_link_head() from common path pcpu_ref: add percpu_ref_tryget_many() io_uring: batch getting pcpu references io_uring: clamp to_submit in io_submit_sqes() io_uring: optimise head checks in io_get_sqring() io_uring: optimise commit_sqring() for common case io_uring: remove extra io_wq_current_is_worker() io_uring: optimise use of ctx->drain_next io_uring: remove extra check in __io_commit_cqring io_uring: hide uring_fd in ctx io_uring: remove REQ_F_IO_DRAINED io_uring: optimise sqe-to-req flags translation io_uring: use labeled array init in io_op_defs io_uring: prep req when do IOSQE_ASYNC io_uring: honor IOSQE_ASYNC for linked reqs io_uring: add comment for drain_next io_uring: fix refcounting with batched allocations at OOM io-wq: allow grabbing existing io-wq io_uring: add io-wq workqueue sharing io_uring: remove extra ->file check io_uring: iterate req cache backwards io_uring: put the flag changing code in the same spot io_uring: get rid of delayed mm check io_uring: fix deferred req iovec leak io_uring: remove unused struct io_async_open io_uring: fix iovec leaks io_uring: add cleanup for openat()/statx() io_uring: fix async close() with f_op->flush() io_uring: fix double prep iovec leak io_uring: fix openat/statx's filename leak io_uring: add missing io_req_cancelled() io_uring: fix use-after-free by io_cleanup_req() io-wq: fix IO_WQ_WORK_NO_CANCEL cancellation io-wq: remove io_wq_flush and IO_WQ_WORK_INTERNAL io_uring: fix lockup with timeouts io_uring: NULL-deref for IOSQE_{ASYNC,DRAIN} io_uring: don't call work.func from sync ctx io_uring: don't do full *prep_worker() from io-wq io_uring: remove req->in_async splice: make do_splice public io_uring: add interface for getting files io_uring: add splice(2) support io_uring: clean io_poll_complete io_uring: extract kmsg copy helper io-wq: remove unused IO_WQ_WORK_HAS_MM io_uring: remove IO_WQ_WORK_CB io-wq: use BIT for ulong hash io_uring: remove extra nxt check after punt io_uring: remove io_prep_next_work() io_uring: clean up io_close io_uring: make submission ref putting consistent io_uring: remove @nxt from handlers io_uring: get next work with submission ref drop io-wq: shuffle io_worker_handle_work() code io-wq: optimise locking in io_worker_handle_work() io-wq: optimise out *next_work() double lock io_uring/io-wq: forward submission ref to async io-wq: remove duplicated cancel code io-wq: don't resched if there is no work io-wq: split hashing and enqueueing io-wq: hash dependent work io-wq: close cancel gap for hashed linked work io_uring: Fix ->data corruption on re-enqueue io-wq: handle hashed writes in chains io_uring: fix ctx refcounting in io_submit_sqes() io_uring: simplify io_get_sqring io_uring: alloc req only after getting sqe io_uring: remove req init from io_get_req() io_uring: don't read user-shared sqe flags twice io_uring: fix fs cleanup on cqe overflow io_uring: remove obsolete @mm_fault io_uring: track mm through current->mm io_uring: early submission req fail code io_uring: keep all sqe->flags in req->flags io_uring: move all request init code in one place io_uring: fix cached_sq_head in io_timeout() io_uring: kill already cached timeout.seq_offset io_uring: don't count rqs failed after current one io_uring: fix extra put in sync_file_range() io_uring: check non-sync defer_list carefully io_uring: punt splice async because of inode mutex splice: move f_mode checks to do_{splice,tee}() io_uring: fix zero len do_splice() io_uring: don't prepare DRAIN reqs twice io_uring: fix FORCE_ASYNC req preparation io_uring: remove req->needs_fixed_files io_uring: rename io_file_put() io_uring: don't repeat valid flag list splice: export do_tee() io_uring: add tee(2) support io_uring: fix flush req->refs underflow io_uring: simplify io_timeout locking io_uring: don't re-read sqe->off in timeout_prep() io_uring: separate DRAIN flushing into a cold path io_uring: get rid of manual punting in io_close io_uring: move timeouts flushing to a helper io_uring: off timeouts based only on completions io_uring: fix overflowed reqs cancellation io_uring: fix {SQ,IO}POLL with unsupported opcodes io_uring: move send/recv IOPOLL check into prep io_uring: don't derive close state from ->func io_uring: remove custom ->func handlers io_uring: don't arm a timeout through work.func io_wq: add per-wq work handler instead of per work io_uring: fix lazy work init io-wq: reorder cancellation pending -> running io-wq: add an option to cancel all matched reqs io_uring: cancel all task's requests on exit io_uring: batch cancel in io_uring_cancel_files() io_uring: lazy get task io_uring: cancel by ->task not pid io-wq: compact io-wq flags numbers io-wq: return next work from ->do_work() directly io_uring: fix hanging iopoll in case of -EAGAIN io_uring: fix current->mm NULL dereference on exit io_uring: fix missing msg_name assignment io_uring: fix not initialised work->flags io_uring: fix recvmsg memory leak with buffer selection io_uring: missed req_init_async() for IOSQE_ASYNC io_uring: fix ->work corruption with poll_add io_uring: fix lockup in io_fail_links() io_uring: rename sr->msg into umsg io_uring: use more specific type in rcv/snd msg cp io_uring: extract io_sendmsg_copy_hdr() io_uring: simplify io_req_map_rw() io_uring: add a helper for async rw iovec prep io_uring: fix potential use after free on fallback request free io_uring: fix stopping iopoll'ing too early io_uring: briefly loose locks while reaping events io_uring: partially inline io_iopoll_getevents() io_uring: fix racy overflow count reporting io-wq: fix hang after cancelling pending hashed work io_uring: clean file_data access in files_register io_uring: refactor *files_register()'s error paths io_uring: keep a pointer ref_node in file_data io_uring: fix double poll mask init io_uring: fix recvmsg setup with compat buf-select io_uring: fix NULL-mm for linked reqs io_uring: fix missing ->mm on exit io_uring: return locked and pinned page accounting io_uring: don't burn CPU for iopoll on exit io_uring: don't miscount pinned memory io_uring: fix provide_buffers sign extension io_uring: fix stalled deferred requests io_uring: kill REQ_F_LINK_NEXT io_uring: deduplicate freeing linked timeouts io_uring: fix refs underflow in io_iopoll_queue() io_uring: remove inflight batching in free_many() io_uring: dismantle req early and remove need_iter io_uring: batch-free linked requests as well io_uring: cosmetic changes for batch free io_uring: clean up req->result setting by rw io_uring: do task_work_run() during iopoll io_uring: fix NULL mm in io_poll_task_func() io_uring: simplify io_async_task_func() io_uring: fix req->work corruption io_uring: fix punting req w/o grabbed env io_uring: fix feeding io-wq with uninit reqs io_uring: don't mark link's head for_async io_uring: fix missing io_grab_files() io_uring: replace find_next() out param with ret io_uring: kill REQ_F_TIMEOUT io_uring: kill REQ_F_TIMEOUT_NOSEQ io_uring: optimise io_req_find_next() fast check io_uring: remove setting REQ_F_MUST_PUNT in rw io_uring: remove REQ_F_MUST_PUNT io_uring: set @poll->file after @poll init io_uring: don't pass def into io_req_work_grab_env io_uring: do init work in grab_env() io_uring: factor out grab_env() from defer_prep() io_uring: do grab_env() just before punting io_uring: fix mis-refcounting linked timeouts io_uring: keep queue_sqe()'s fail path separately io_uring: fix lost cqe->flags io_uring: don't delay iopoll'ed req completion io_uring: remove nr_events arg from iopoll_check() io_uring: share completion list w/ per-op space io_uring: rename ctx->poll into ctx->iopoll io_uring: use inflight_entry list for iopoll'ing io_uring: use completion list for CQ overflow io_uring: add req->timeout.list io_uring: remove init for unused list io_uring: use non-intrusive list for defer io_uring: remove sequence from io_kiocb io_uring: place cflags into completion data io_uring: fix cancel of deferred reqs with ->files io_uring: fix linked deferred ->files cancellation io_uring: fix racy IOPOLL completions io_uring: inline io_req_work_grab_env() io_uring: alloc ->io in io_req_defer_prep() io_uring/io-wq: move RLIMIT_FSIZE to io-wq io_uring: mark ->work uninitialised after cleanup io_uring: follow **iovec idiom in io_import_iovec io_uring: de-unionise io_kiocb io_uring: consolidate *_check_overflow accounting io_uring: get rid of atomic FAA for cq_timeouts io-wq: update hash bits io_uring: indent left {send,recv}[msg]() io_uring: remove extra checks in send/recv io_uring: don't forget cflags in io_recv() io_uring: free selected-bufs if error'ed io_uring: move BUFFER_SELECT check into *recv[msg] io_uring: simplify file ref tracking in submission state io_uring: extract io_put_kbuf() helper io_uring: don't open-code recv kbuf managment io_uring: don't do opcode prep twice io_uring: deduplicate io_grab_files() calls io_uring: fix missing io_queue_linked_timeout() tasks: add put_task_struct_many() io_uring: batch put_task_struct() io_uring: fix racy req->flags modification io_uring: get an active ref_node from files_data io_uring: order refnode recycling Randy Dunlap (2): io_uring: fix 1-bit bitfields to be unsigned io_uring: fix function args for !CONFIG_NET Roman Gushchin (1): percpu_ref: introduce PERCPU_REF_ALLOW_REINIT flag Roman Penyaev (3): io_uring: offload write to async worker in case of -EAGAIN io_uring: fix infinite wait in khread_park() on io_finish_async() io_uring: add mapping support for NOMMU archs Shenghui Wang (1): io_uring: use cpu_online() to check p->sq_thread_cpu instead of cpu_possible() Stefan Bühler (13): io_uring: fix race condition reading SQ entries io_uring: fix race condition when sq threads goes sleeping io_uring: fix poll full SQ detection io_uring: fix handling SQEs requesting NOWAIT io_uring: fix notes on barriers io_uring: remove unnecessary barrier before wq_has_sleeper io_uring: remove unnecessary barrier before reading cq head io_uring: remove unnecessary barrier after updating SQ head io_uring: remove unnecessary barrier before reading SQ tail io_uring: remove unnecessary barrier after incrementing dropped counter io_uring: remove unnecessary barrier after unsetting IORING_SQ_NEED_WAKEUP req->error only used for iopoll io_uring: fix race condition reading SQE data Stefan Metzmacher (1): io_uring: add BUILD_BUG_ON() to assert the layout of struct io_uring_sqe Stefano Garzarella (4): io_uring: flush overflowed CQ events in the io_uring_poll() io_uring: prevent sq_thread from spinning when it should stop io_uring: add 'cq_flags' field for the CQ ring io_uring: add IORING_CQ_EVENTFD_DISABLED to the CQ ring flags Steve French (1): cifs: fix rmmod regression in cifs.ko caused by force_sig changes Thomas Gleixner (2): sched: Remove stale PF_MUTEX_TESTER bit sched/core, workqueues: Distangle worker accounting from rq lock Tobias Klauser (1): io_uring: define and set show_fdinfo only if procfs is enabled Xiaoguang Wang (24): io_uring: fix __io_iopoll_check deadlock in io_sq_thread io_uring: fix poll_list race for SETUP_IOPOLL|SETUP_SQPOLL io_uring: io_uring_enter(2) don't poll while SETUP_IOPOLL|SETUP_SQPOLL enabled io_uring: cleanup io_alloc_async_ctx() io_uring: refactor file register/unregister/update handling io_uring: initialize fixed_file_data lock io_uring: do not always copy iovec in io_req_map_rw() io_uring: restore req->work when canceling poll request io_uring: only restore req->work for req that needs do completion io_uring: use cond_resched() in io_ring_ctx_wait_and_kill() io_uring: fix mismatched finish_wait() calls in io_uring_cancel_files() io_uring: handle -EFAULT properly in io_uring_setup() io_uring: reset -EBUSY error when io sq thread is waken up io_uring: remove obsolete 'state' parameter io_uring: don't submit sqes when ctx->refs is dying io_uring: avoid whole io_wq_work copy for requests completed inline io_uring: avoid unnecessary io_wq_work copy for fast poll feature io_uring: fix io_kiocb.flags modification race in IOPOLL mode io_uring: don't fail links for EAGAIN error in IOPOLL mode io_uring: add memory barrier to synchronize io_kiocb's result and iopoll_completed io_uring: fix possible race condition against REQ_F_NEED_CLEANUP io_uring: export cq overflow status to userspace io_uring: clear IORING_SQ_NEED_WAKEUP after executing task works io_uring: always let io_iopoll_complete() complete polled io Xiaoming Ni (1): io_uring: remove duplicate semicolon at the end of line Xuan Zhuo (1): io_uring: fix io_sq_thread no schedule when busy Yang Yingliang (2): io_uring: fix memleak in __io_sqe_files_update() io_uring: fix memleak in io_sqe_files_register() YueHaibing (3): io-wq: use kfree_rcu() to simplify the code io_uring: Remove unnecessary null check io_uring: Fix unused function warnings Zhengyuan Liu (4): io_uring: fix the sequence comparison in io_sequence_defer io_uring: fix counter inc/dec mismatch in async_list io_uring: add a memory barrier before atomic_read io_uring: track io length in async_list based on bytes yangerkun (9): fs: fix kabi change since add iopoll io_uring: compare cached_cq_tail with cq.head in_io_uring_poll io_uring: consider the overflow of sequence for timeout req io_uring: fix logic error in io_timeout fs: introduce __close_fd_get_file to support IORING_OP_CLOSE for io_uring fs: make filename_lookup available externally x86: fix kabi with io_uring interface arm64: fix kabi with io_uring interface io_uring: add IORING_OP_OPENAT2 for compatablity zhangyi (F) (2): io_uring : correct timeout req sequence when waiting timeout io_uring: correct timeout req sequence when inserting a new entry Documentation/filesystems/vfs.txt | 3 + arch/arm64/include/asm/syscall_wrapper.h | 5 + arch/arm64/kernel/syscall.c | 9 +- arch/x86/entry/common.c | 7 + arch/x86/include/asm/syscall_wrapper.h | 3 + block/blk-core.c | 12 +- block/blk-merge.c | 7 +- drivers/block/drbd/drbd_main.c | 2 + fs/Kconfig | 3 + fs/Makefile | 2 + fs/aio.c | 157 +- fs/cifs/connect.c | 3 +- fs/eventpoll.c | 143 +- fs/file.c | 53 +- fs/file_table.c | 9 +- fs/internal.h | 9 + fs/io-wq.c | 1158 +++ fs/io-wq.h | 152 + fs/io_uring.c | 8822 ++++++++++++++++++++++ fs/namei.c | 4 +- fs/open.c | 2 +- fs/select.c | 376 +- fs/splice.c | 62 +- fs/stat.c | 65 +- fs/sync.c | 141 +- include/linux/compat.h | 19 + include/linux/eventpoll.h | 9 + include/linux/fdtable.h | 1 + include/linux/file.h | 3 + include/linux/fs.h | 22 +- include/linux/ioprio.h | 13 + include/linux/mm.h | 1 + include/linux/percpu-refcount.h | 36 +- include/linux/sched.h | 2 +- include/linux/sched/jobctl.h | 4 +- include/linux/sched/signal.h | 12 +- include/linux/sched/task.h | 6 + include/linux/sched/user.h | 2 +- include/linux/signal.h | 15 +- include/linux/socket.h | 25 + include/linux/splice.h | 6 + include/linux/syscalls.h | 28 +- include/linux/task_work.h | 5 +- include/linux/uio.h | 4 +- include/net/af_unix.h | 1 + include/net/compat.h | 3 + include/trace/events/io_uring.h | 495 ++ include/uapi/linux/aio_abi.h | 2 + include/uapi/linux/io_uring.h | 294 + init/Kconfig | 10 + kernel/sched/core.c | 96 +- kernel/signal.c | 63 +- kernel/sys_ni.c | 3 + kernel/task_work.c | 34 +- kernel/workqueue.c | 54 +- kernel/workqueue_internal.h | 5 +- lib/iov_iter.c | 15 +- lib/percpu-refcount.c | 28 +- mm/madvise.c | 7 +- net/Makefile | 2 +- net/compat.c | 31 +- net/socket.c | 298 +- net/unix/Kconfig | 5 + net/unix/Makefile | 2 + net/unix/af_unix.c | 63 +- net/unix/garbage.c | 68 +- net/unix/scm.c | 151 + net/unix/scm.h | 10 + tools/io_uring/Makefile | 18 + tools/io_uring/README | 29 + tools/io_uring/barrier.h | 16 + tools/io_uring/io_uring-bench.c | 592 ++ tools/io_uring/io_uring-cp.c | 260 + tools/io_uring/liburing.h | 187 + tools/io_uring/queue.c | 156 + tools/io_uring/setup.c | 107 + tools/io_uring/syscall.c | 52 + 77 files changed, 13750 insertions(+), 829 deletions(-) create mode 100644 fs/io-wq.c create mode 100644 fs/io-wq.h create mode 100644 fs/io_uring.c create mode 100644 include/trace/events/io_uring.h create mode 100644 include/uapi/linux/io_uring.h create mode 100644 net/unix/scm.c create mode 100644 net/unix/scm.h create mode 100644 tools/io_uring/Makefile create mode 100644 tools/io_uring/README create mode 100644 tools/io_uring/barrier.h create mode 100644 tools/io_uring/io_uring-bench.c create mode 100644 tools/io_uring/io_uring-cp.c create mode 100644 tools/io_uring/liburing.h create mode 100644 tools/io_uring/queue.c create mode 100644 tools/io_uring/setup.c create mode 100644 tools/io_uring/syscall.c -- 2.25.1

1 347

[PATCH kernel-4.19 00/66] backport stable-4.19.187
by Yang Yingliang 15 Apr '21

15 Apr '21

Ahmed S. Darwish (1): net: xfrm: Localize sequence counter per network namespace Alexander Aring (8): net: ieee802154: nl-mac: fix check on panid net: ieee802154: fix nl802154 del llsec key net: ieee802154: fix nl802154 del llsec dev net: ieee802154: fix nl802154 add llsec key net: ieee802154: fix nl802154 del llsec devkey net: ieee802154: forbid monitor for set llsec params net: ieee802154: forbid monitor for del llsec seclevel net: ieee802154: stop dump llsec params for monitors Alexander Gordeev (1): s390/cpcmd: fix inline assembly register clobbering Anirudh Rayabharam (1): net: hso: fix null-ptr-deref during tty device unregistration Arnd Bergmann (1): soc/fsl: qbman: fix conflicting alignment attributes Aya Levin (1): net/mlx5: Fix PBMC register mapping Bastian Germann (1): ASoC: sunxi: sun4i-codec: fill ASoC card owner Claudiu Manoil (1): gianfar: Handle error code at MAC address change Du Cheng (1): cfg80211: remove WARN_ON() in cfg80211_sme_connect Eric Dumazet (2): net: ensure mac header is set in virtio_net_hdr_to_skb() sch_red: fix off-by-one checks in red_check_params() Eryk Rybak (1): i40e: Fix kernel oops when i40e driver removes VF's Eyal Birger (1): xfrm: interface: fix ipv4 pmtu check to honor ip header df Fabio Pricoco (1): ice: Increase control queue timeout Gao Xiang (1): parisc: avoid a warning on u8 cast for cmpxchg on u8 pointers Geert Uytterhoeven (1): regulator: bd9571mwv: Fix AVS and DVFS voltage range Greg Kroah-Hartman (2): Revert "cifs: Set CIFS_MOUNT_USE_PREFIX_PATH flag on setting cifs_sb->prepath." Linux 4.19.187 Hans de Goede (1): ASoC: intel: atom: Stop advertising non working S24LE support Helge Deller (1): parisc: parisc-agp requires SBA IOMMU driver Jack Qiu (1): fs: direct-io: fix missing sdio->boundary Jonas Holmberg (1): ALSA: aloop: Fix initialization of controls Krzysztof Kozlowski (1): clk: socfpga: fix iomem pointer cast on 64-bit Kumar Kartikeya Dwivedi (1): net: sched: bump refcount for new action in ACT replace mode Luca Fancellu (1): xen/evtchn: Change irq_info lock to raw_spinlock_t Lukasz Bartosik (2): clk: fix invalid usage of list cursor in register clk: fix invalid usage of list cursor in unregister Lv Yunlong (1): net:tipc: Fix a double free in tipc_sk_mcast_rcv Maciej Żenczykowski (1): net-ipv6: bugfix - raw & sctp - switch to ipv6_can_nonlocal_bind() Marek Behún (1): ARM: dts: turris-omnia: configure LED[2]/INTn pin as interrupt pin Mateusz Palczewski (1): i40e: Added Asym_Pause to supported link modes Mike Rapoport (1): nds32: flush_dcache_page: use page_mapping_file to avoid races with swapoff Milton Miller (1): net/ncsi: Avoid channel_monitor hrtimer deadlock Muhammad Usama Anjum (1): net: ipv6: check for validity before dereferencing cfg->fc_nlinfo.nlh Pavel Skripkin (3): drivers: net: fix memory leak in atusb_probe drivers: net: fix memory leak in peak_usb_create_dev net: mac802154: Fix general protection fault Pavel Tikhomirov (1): net: sched: sch_teql: fix null-pointer dereference Phillip Potter (1): net: tun: set tun->dev->addr_len during TUNSETLINK processing Potnuri Bharat Teja (1): RDMA/cxgb4: check for ipv6 address properly while destroying listener Raed Salem (1): net/mlx5: Fix placement of log_max_flow_counter Rahul Lakkireddy (1): cxgb4: avoid collecting SGE_QBASE regs during traffic Sergei Trofimovich (1): ia64: fix user_stack_pointer() for ptrace() Shengjiu Wang (1): ASoC: wm8960: Fix wrong bclk and lrclk with pll enabled for some chips Shuah Khan (4): usbip: add sysfs_lock to synchronize sysfs code paths usbip: stub-dev synchronize sysfs code paths usbip: vudc synchronize sysfs code paths usbip: synchronize event handler with sysfs code paths Shyam Sundar S K (1): amd-xgbe: Update DMA coherency values Stefan Riedmueller (1): ARM: dts: imx6: pbab01: Set vmmc supply for both SD interfaces Tetsuo Handa (1): batman-adv: initialize "struct batadv_tvlv_tt_vlan_data"->reserved field Wengang Wang (1): ocfs2: fix deadlock between setattr and dio_end_io_write Wolfram Sang (1): i2c: turn recovery error on init to debug Xiaoming Ni (4): nfc: fix refcount leak in llcp_sock_bind() nfc: fix refcount leak in llcp_sock_connect() nfc: fix memory leak in llcp_sock_connect() nfc: Avoid endless loops caused by repeated llcp_sock_connect() Yuya Kusakabe (1): virtio_net: Add XDP meta data support Zqiang (1): workqueue: Move the position of debug_work_activate() in __queue_work() Makefile | 2 +- arch/arm/boot/dts/armada-385-turris-omnia.dts | 1 + arch/arm/boot/dts/imx6qdl-phytec-pfla02.dtsi | 2 + arch/ia64/include/asm/ptrace.h | 8 +-- arch/nds32/mm/cacheflush.c | 2 +- arch/parisc/include/asm/cmpxchg.h | 2 +- arch/s390/kernel/cpcmd.c | 6 ++- drivers/char/agp/Kconfig | 2 +- drivers/clk/clk.c | 47 ++++++++--------- drivers/clk/socfpga/clk-gate.c | 2 +- drivers/i2c/i2c-core-base.c | 7 +-- drivers/infiniband/hw/cxgb4/cm.c | 3 +- drivers/net/can/usb/peak_usb/pcan_usb_core.c | 6 ++- drivers/net/ethernet/amd/xgbe/xgbe.h | 6 +-- .../net/ethernet/chelsio/cxgb4/cudbg_lib.c | 23 ++++++-- drivers/net/ethernet/chelsio/cxgb4/t4_hw.c | 3 +- drivers/net/ethernet/freescale/gianfar.c | 6 ++- drivers/net/ethernet/intel/i40e/i40e.h | 1 + .../net/ethernet/intel/i40e/i40e_ethtool.c | 1 + .../ethernet/intel/i40e/i40e_virtchnl_pf.c | 9 ++++ drivers/net/ethernet/intel/ice/ice_controlq.h | 4 +- drivers/net/ieee802154/atusb.c | 1 + drivers/net/tun.c | 48 +++++++++++++++++ drivers/net/usb/hso.c | 33 +++++------- drivers/net/virtio_net.c | 52 ++++++++++++------- drivers/regulator/bd9571mwv-regulator.c | 4 +- drivers/soc/fsl/qbman/qman.c | 2 +- drivers/usb/usbip/stub_dev.c | 11 +++- drivers/usb/usbip/usbip_common.h | 3 ++ drivers/usb/usbip/usbip_event.c | 2 + drivers/usb/usbip/vhci_hcd.c | 1 + drivers/usb/usbip/vhci_sysfs.c | 30 +++++++++-- drivers/usb/usbip/vudc_dev.c | 1 + drivers/usb/usbip/vudc_sysfs.c | 5 ++ drivers/xen/events/events_base.c | 10 ++-- drivers/xen/events/events_internal.h | 2 +- fs/cifs/connect.c | 1 - fs/direct-io.c | 5 +- fs/ocfs2/aops.c | 11 +--- fs/ocfs2/file.c | 8 ++- include/linux/mlx5/mlx5_ifc.h | 8 +-- include/linux/virtio_net.h | 2 + include/net/netns/xfrm.h | 4 +- include/net/red.h | 4 +- kernel/workqueue.c | 2 +- net/batman-adv/translation-table.c | 2 + net/ieee802154/nl-mac.c | 7 +-- net/ieee802154/nl802154.c | 23 ++++++-- net/ipv6/raw.c | 2 +- net/ipv6/route.c | 8 +-- net/mac802154/llsec.c | 2 +- net/ncsi/ncsi-manage.c | 20 ++++--- net/nfc/llcp_sock.c | 10 ++++ net/sched/act_api.c | 3 ++ net/sched/sch_teql.c | 3 ++ net/sctp/ipv6.c | 7 ++- net/tipc/socket.c | 2 +- net/wireless/sme.c | 2 +- net/xfrm/xfrm_interface.c | 3 ++ net/xfrm/xfrm_state.c | 10 ++-- sound/drivers/aloop.c | 11 ++-- sound/soc/codecs/wm8960.c | 8 ++- sound/soc/intel/atom/sst-mfld-platform-pcm.c | 6 +-- sound/soc/sunxi/sun4i-codec.c | 5 ++ 64 files changed, 354 insertions(+), 173 deletions(-) -- 2.25.1

1 38

[PATCH kernel-4.19 13/13] config: Enable CONFIG_USERSWAP for hulk_defconfg and openeuler_defconfig
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Xiongfeng Wang <wangxiongfeng2(a)huawei.com> hulk inclusion category: feature bugzilla: 47439 CVE: NA ------------------------------------------------- Enable CONFIG_USERSWAP for hulk_defconfg and openeuler_defconfig Signed-off-by: Xiongfeng Wang <wangxiongfeng2(a)huawei.com> Reviewed-by: Kefeng Wang <wangkefeng.wang(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- arch/arm64/configs/hulk_defconfig | 1 + arch/arm64/configs/openeuler_defconfig | 1 + 2 files changed, 2 insertions(+) diff --git a/arch/arm64/configs/hulk_defconfig b/arch/arm64/configs/hulk_defconfig index 173572129ca7b..cba96801c439c 100644 --- a/arch/arm64/configs/hulk_defconfig +++ b/arch/arm64/configs/hulk_defconfig @@ -991,6 +991,7 @@ CONFIG_TRANSPARENT_HUGE_PAGECACHE=y CONFIG_CLEANCACHE=y CONFIG_FRONTSWAP=y CONFIG_SHRINK_PAGECACHE=y +CONFIG_USERSWAP=y CONFIG_CMA=y # CONFIG_CMA_DEBUG is not set # CONFIG_CMA_DEBUGFS is not set diff --git a/arch/arm64/configs/openeuler_defconfig b/arch/arm64/configs/openeuler_defconfig index c7b8fa47c7100..769d992f2d522 100644 --- a/arch/arm64/configs/openeuler_defconfig +++ b/arch/arm64/configs/openeuler_defconfig @@ -983,6 +983,7 @@ CONFIG_TRANSPARENT_HUGE_PAGECACHE=y CONFIG_CLEANCACHE=y CONFIG_FRONTSWAP=y CONFIG_SHRINK_PAGECACHE=y +CONFIG_USERSWAP=y CONFIG_CMA=y # CONFIG_CMA_DEBUG is not set # CONFIG_CMA_DEBUGFS is not set -- 2.25.1

1 0

[PATCH kernel-4.19 19/19] Linux 4.19.186
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Merge 19 patches from 4.19.186 stable branch (19 total) beside 0 already merged patches. Tested-by: Guenter Roeck <linux(a)roeck-us.net> Tested-by: Jason Self <jason(a)bluehome.net> Tested-by: Linux Kernel Functional Testing <lkft(a)linaro.org> Link: https://lore.kernel.org/r/20210409095301.525783608@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Makefile b/Makefile index 30e8f205e89a9..854985e7d5df1 100644 --- a/Makefile +++ b/Makefile @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 VERSION = 4 PATCHLEVEL = 19 -SUBLEVEL = 185 +SUBLEVEL = 186 EXTRAVERSION = NAME = "People's Front" -- 2.25.1

1 0

[PATCH kernel-4.19 18/19] init/Kconfig: make COMPILE_TEST depend on HAS_IOMEM
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Masahiro Yamada <masahiroy(a)kernel.org> commit ea29b20a828511de3348334e529a3d046a180416 upstream. I read the commit log of the following two: - bc083a64b6c0 ("init/Kconfig: make COMPILE_TEST depend on !UML") - 334ef6ed06fa ("init/Kconfig: make COMPILE_TEST depend on !S390") Both are talking about HAS_IOMEM dependency missing in many drivers. So, 'depends on HAS_IOMEM' seems the direct, sensible solution to me. This does not change the behavior of UML. UML still cannot enable COMPILE_TEST because it does not provide HAS_IOMEM. The current dependency for S390 is too strong. Under the condition of CONFIG_PCI=y, S390 provides HAS_IOMEM, hence can enable COMPILE_TEST. I also removed the meaningless 'default n'. Link: https://lkml.kernel.org/r/20210224140809.1067582-1-masahiroy@kernel.org Signed-off-by: Masahiro Yamada <masahiroy(a)kernel.org> Cc: Heiko Carstens <hca(a)linux.ibm.com> Cc: Guenter Roeck <linux(a)roeck-us.net> Cc: Arnd Bergmann <arnd(a)kernel.org> Cc: Kees Cook <keescook(a)chromium.org> Cc: Daniel Borkmann <daniel(a)iogearbox.net> Cc: Johannes Weiner <hannes(a)cmpxchg.org> Cc: KP Singh <kpsingh(a)google.com> Cc: Nathan Chancellor <nathan(a)kernel.org> Cc: Nick Terrell <terrelln(a)fb.com> Cc: Quentin Perret <qperret(a)google.com> Cc: Valentin Schneider <valentin.schneider(a)arm.com> Cc: "Enrico Weigelt, metux IT consult" <lkml(a)metux.net> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: Guenter Roeck <linux(a)roeck-us.net> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- init/Kconfig | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/init/Kconfig b/init/Kconfig index 5682a3300ff2e..43791a6d40da5 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -66,8 +66,7 @@ config INIT_ENV_ARG_LIMIT config COMPILE_TEST bool "Compile also drivers which will not load" - depends on !UML && !S390 - default n + depends on HAS_IOMEM help Some drivers can be compiled on a different platform than they are intended to be run on. Despite they cannot be loaded there (or even -- 2.25.1

1 0

[PATCH kernel-4.19 17/19] init/Kconfig: make COMPILE_TEST depend on !S390
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Heiko Carstens <hca(a)linux.ibm.com> commit 334ef6ed06fa1a54e35296b77b693bcf6d63ee9e upstream. While allmodconfig and allyesconfig build for s390 there are also various bots running compile tests with randconfig, where PCI is disabled. This reveals that a lot of drivers should actually depend on HAS_IOMEM. Adding this to each device driver would be a never ending story, therefore just disable COMPILE_TEST for s390. The reasoning is more or less the same as described in commit bc083a64b6c0 ("init/Kconfig: make COMPILE_TEST depend on !UML"). Reported-by: kernel test robot <lkp(a)intel.com> Suggested-by: Arnd Bergmann <arnd(a)kernel.org> Signed-off-by: Heiko Carstens <hca(a)linux.ibm.com> Cc: Guenter Roeck <linux(a)roeck-us.net> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- init/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/init/Kconfig b/init/Kconfig index 71b09d9984135..5682a3300ff2e 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -66,7 +66,7 @@ config INIT_ENV_ARG_LIMIT config COMPILE_TEST bool "Compile also drivers which will not load" - depends on !UML + depends on !UML && !S390 default n help Some drivers can be compiled on a different platform than they are -- 2.25.1

1 0

[PATCH kernel-4.19 15/19] bpf, x86: Validate computation of branch displacements for x86-64
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Piotr Krysiuk <piotras(a)gmail.com> commit e4d4d456436bfb2fe412ee2cd489f7658449b098 upstream. The branch displacement logic in the BPF JIT compilers for x86 assumes that, for any generated branch instruction, the distance cannot increase between optimization passes. But this assumption can be violated due to how the distances are computed. Specifically, whenever a backward branch is processed in do_jit(), the distance is computed by subtracting the positions in the machine code from different optimization passes. This is because part of addrs[] is already updated for the current optimization pass, before the branch instruction is visited. And so the optimizer can expand blocks of machine code in some cases. This can confuse the optimizer logic, where it assumes that a fixed point has been reached for all machine code blocks once the total program size stops changing. And then the JIT compiler can output abnormal machine code containing incorrect branch displacements. To mitigate this issue, we assert that a fixed point is reached while populating the output image. This rejects any problematic programs. The issue affects both x86-32 and x86-64. We mitigate separately to ease backporting. Signed-off-by: Piotr Krysiuk <piotras(a)gmail.com> Reviewed-by: Daniel Borkmann <daniel(a)iogearbox.net> Signed-off-by: Daniel Borkmann <daniel(a)iogearbox.net> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/net/bpf_jit_comp.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/arch/x86/net/bpf_jit_comp.c b/arch/x86/net/bpf_jit_comp.c index 46ab928312517..924ca27a6139b 100644 --- a/arch/x86/net/bpf_jit_comp.c +++ b/arch/x86/net/bpf_jit_comp.c @@ -1019,7 +1019,16 @@ xadd: if (is_imm8(insn->off)) } if (image) { - if (unlikely(proglen + ilen > oldproglen)) { + /* + * When populating the image, assert that: + * + * i) We do not write beyond the allocated space, and + * ii) addrs[i] did not change from the prior run, in order + * to validate assumptions made for computing branch + * displacements. + */ + if (unlikely(proglen + ilen > oldproglen || + proglen + ilen != addrs[i])) { pr_err("bpf_jit: fatal error\n"); return -EFAULT; } -- 2.25.1

1 0

[PATCH kernel-4.19 14/19] cifs: Silently ignore unknown oplock break handle
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Vincent Whitchurch <vincent.whitchurch(a)axis.com> [ Upstream commit 219481a8f90ec3a5eed9638fb35609e4b1aeece7 ] Make SMB2 not print out an error when an oplock break is received for an unknown handle, similar to SMB1. The debug message which is printed for these unknown handles may also be misleading, so fix that too. The SMB2 lease break path is not affected by this patch. Without this, a program which writes to a file from one thread, and opens, reads, and writes the same file from another thread triggers the below errors several times a minute when run against a Samba server configured with "smb2 leases = no". CIFS: VFS: \\192.168.0.1 No task to wake, unknown frame received! NumMids 2 00000000: 424d53fe 00000040 00000000 00000012 .SMB@........... 00000010: 00000001 00000000 ffffffff ffffffff ................ 00000020: 00000000 00000000 00000000 00000000 ................ 00000030: 00000000 00000000 00000000 00000000 ................ Signed-off-by: Vincent Whitchurch <vincent.whitchurch(a)axis.com> Reviewed-by: Tom Talpey <tom(a)talpey.com> Reviewed-by: Paulo Alcantara (SUSE) <pc(a)cjr.nz> Signed-off-by: Steve French <stfrench(a)microsoft.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- fs/cifs/smb2misc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/cifs/smb2misc.c b/fs/cifs/smb2misc.c index 7d875a47d0226..7177720e822e1 100644 --- a/fs/cifs/smb2misc.c +++ b/fs/cifs/smb2misc.c @@ -738,8 +738,8 @@ smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server) } } spin_unlock(&cifs_tcp_ses_lock); - cifs_dbg(FYI, "Can not process oplock break for non-existent connection\n"); - return false; + cifs_dbg(FYI, "No file id matched, oplock break ignored\n"); + return true; } void -- 2.25.1

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[PATCH kernel-4.19 13/19] cifs: revalidate mapping when we open files for SMB1 POSIX
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Ronnie Sahlberg <lsahlber(a)redhat.com> [ Upstream commit cee8f4f6fcabfdf229542926128e9874d19016d5 ] RHBZ: 1933527 Under SMB1 + POSIX, if an inode is reused on a server after we have read and cached a part of a file, when we then open the new file with the re-cycled inode there is a chance that we may serve the old data out of cache to the application. This only happens for SMB1 (deprecated) and when posix are used. The simplest solution to avoid this race is to force a revalidate on smb1-posix open. Signed-off-by: Ronnie Sahlberg <lsahlber(a)redhat.com> Reviewed-by: Paulo Alcantara (SUSE) <pc(a)cjr.nz> Signed-off-by: Steve French <stfrench(a)microsoft.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- fs/cifs/file.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/cifs/file.c b/fs/cifs/file.c index efaf54ce6b5fe..ed9e67f976189 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -163,6 +163,7 @@ int cifs_posix_open(char *full_path, struct inode **pinode, goto posix_open_ret; } } else { + cifs_revalidate_mapping(*pinode); cifs_fattr_to_inode(*pinode, &fattr); } -- 2.25.1

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[PATCH kernel-4.19 12/19] ia64: fix format strings for err_inject
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Sergei Trofimovich <slyfox(a)gentoo.org> [ Upstream commit 95d44a470a6814207d52dd6312203b0f4ef12710 ] Fix warning with %lx / u64 mismatch: arch/ia64/kernel/err_inject.c: In function 'show_resources': arch/ia64/kernel/err_inject.c:62:22: warning: format '%lx' expects argument of type 'long unsigned int', but argument 3 has type 'u64' {aka 'long long unsigned int'} 62 | return sprintf(buf, "%lx", name[cpu]); \ | ^~~~~~~ Link: https://lkml.kernel.org/r/20210313104312.1548232-1-slyfox@gentoo.org Signed-off-by: Sergei Trofimovich <slyfox(a)gentoo.org> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds(a)linux-foundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- arch/ia64/kernel/err_inject.c | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) diff --git a/arch/ia64/kernel/err_inject.c b/arch/ia64/kernel/err_inject.c index 8b5b8e6bc9d9a..dd5bfed52031d 100644 --- a/arch/ia64/kernel/err_inject.c +++ b/arch/ia64/kernel/err_inject.c @@ -59,7 +59,7 @@ show_##name(struct device *dev, struct device_attribute *attr, \ char *buf) \ { \ u32 cpu=dev->id; \ - return sprintf(buf, "%lx\n", name[cpu]); \ + return sprintf(buf, "%llx\n", name[cpu]); \ } #define store(name) \ @@ -86,9 +86,9 @@ store_call_start(struct device *dev, struct device_attribute *attr, #ifdef ERR_INJ_DEBUG printk(KERN_DEBUG "pal_mc_err_inject for cpu%d:\n", cpu); - printk(KERN_DEBUG "err_type_info=%lx,\n", err_type_info[cpu]); - printk(KERN_DEBUG "err_struct_info=%lx,\n", err_struct_info[cpu]); - printk(KERN_DEBUG "err_data_buffer=%lx, %lx, %lx.\n", + printk(KERN_DEBUG "err_type_info=%llx,\n", err_type_info[cpu]); + printk(KERN_DEBUG "err_struct_info=%llx,\n", err_struct_info[cpu]); + printk(KERN_DEBUG "err_data_buffer=%llx, %llx, %llx.\n", err_data_buffer[cpu].data1, err_data_buffer[cpu].data2, err_data_buffer[cpu].data3); @@ -117,8 +117,8 @@ store_call_start(struct device *dev, struct device_attribute *attr, #ifdef ERR_INJ_DEBUG printk(KERN_DEBUG "Returns: status=%d,\n", (int)status[cpu]); - printk(KERN_DEBUG "capabilities=%lx,\n", capabilities[cpu]); - printk(KERN_DEBUG "resources=%lx\n", resources[cpu]); + printk(KERN_DEBUG "capabilities=%llx,\n", capabilities[cpu]); + printk(KERN_DEBUG "resources=%llx\n", resources[cpu]); #endif return size; } @@ -131,7 +131,7 @@ show_virtual_to_phys(struct device *dev, struct device_attribute *attr, char *buf) { unsigned int cpu=dev->id; - return sprintf(buf, "%lx\n", phys_addr[cpu]); + return sprintf(buf, "%llx\n", phys_addr[cpu]); } static ssize_t @@ -145,7 +145,7 @@ store_virtual_to_phys(struct device *dev, struct device_attribute *attr, ret = get_user_pages_fast(virt_addr, 1, FOLL_WRITE, NULL); if (ret<=0) { #ifdef ERR_INJ_DEBUG - printk("Virtual address %lx is not existing.\n",virt_addr); + printk("Virtual address %llx is not existing.\n", virt_addr); #endif return -EINVAL; } @@ -163,7 +163,7 @@ show_err_data_buffer(struct device *dev, { unsigned int cpu=dev->id; - return sprintf(buf, "%lx, %lx, %lx\n", + return sprintf(buf, "%llx, %llx, %llx\n", err_data_buffer[cpu].data1, err_data_buffer[cpu].data2, err_data_buffer[cpu].data3); @@ -178,13 +178,13 @@ store_err_data_buffer(struct device *dev, int ret; #ifdef ERR_INJ_DEBUG - printk("write err_data_buffer=[%lx,%lx,%lx] on cpu%d\n", + printk("write err_data_buffer=[%llx,%llx,%llx] on cpu%d\n", err_data_buffer[cpu].data1, err_data_buffer[cpu].data2, err_data_buffer[cpu].data3, cpu); #endif - ret=sscanf(buf, "%lx, %lx, %lx", + ret = sscanf(buf, "%llx, %llx, %llx", &err_data_buffer[cpu].data1, &err_data_buffer[cpu].data2, &err_data_buffer[cpu].data3); -- 2.25.1

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[PATCH kernel-4.19 11/19] ia64: mca: allocate early mca with GFP_ATOMIC
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Sergei Trofimovich <slyfox(a)gentoo.org> [ Upstream commit f2a419cf495f95cac49ea289318b833477e1a0e2 ] The sleep warning happens at early boot right at secondary CPU activation bootup: smp: Bringing up secondary CPUs ... BUG: sleeping function called from invalid context at mm/page_alloc.c:4942 in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 0, name: swapper/1 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.12.0-rc2-00007-g79e228d0b611-dirty #99 .. Call Trace: show_stack+0x90/0xc0 dump_stack+0x150/0x1c0 ___might_sleep+0x1c0/0x2a0 __might_sleep+0xa0/0x160 __alloc_pages_nodemask+0x1a0/0x600 alloc_page_interleave+0x30/0x1c0 alloc_pages_current+0x2c0/0x340 __get_free_pages+0x30/0xa0 ia64_mca_cpu_init+0x2d0/0x3a0 cpu_init+0x8b0/0x1440 start_secondary+0x60/0x700 start_ap+0x750/0x780 Fixed BSP b0 value from CPU 1 As I understand interrupts are not enabled yet and system has a lot of memory. There is little chance to sleep and switch to GFP_ATOMIC should be a no-op. Link: https://lkml.kernel.org/r/20210315085045.204414-1-slyfox@gentoo.org Signed-off-by: Sergei Trofimovich <slyfox(a)gentoo.org> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds(a)linux-foundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- arch/ia64/kernel/mca.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c index 6115464d5f03d..d7400b2844f1c 100644 --- a/arch/ia64/kernel/mca.c +++ b/arch/ia64/kernel/mca.c @@ -1860,7 +1860,7 @@ ia64_mca_cpu_init(void *cpu_data) data = mca_bootmem(); first_time = 0; } else - data = (void *)__get_free_pages(GFP_KERNEL, + data = (void *)__get_free_pages(GFP_ATOMIC, get_order(sz)); if (!data) panic("Could not allocate MCA memory for cpu %d\n", -- 2.25.1

1 0

[PATCH kernel-4.19 10/19] scsi: target: pscsi: Clean up after failure in pscsi_map_sg()
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Martin Wilck <mwilck(a)suse.com> [ Upstream commit 36fa766faa0c822c860e636fe82b1affcd022974 ] If pscsi_map_sg() fails, make sure to drop references to already allocated bios. Link: https://lore.kernel.org/r/20210323212431.15306-2-mwilck@suse.com Reviewed-by: Christoph Hellwig <hch(a)lst.de> Reviewed-by: Lee Duncan <lduncan(a)suse.com> Signed-off-by: Martin Wilck <mwilck(a)suse.com> Signed-off-by: Martin K. Petersen <martin.petersen(a)oracle.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/target/target_core_pscsi.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c index 47d76c8620147..02c4e3beb2640 100644 --- a/drivers/target/target_core_pscsi.c +++ b/drivers/target/target_core_pscsi.c @@ -970,6 +970,14 @@ pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, return 0; fail: + if (bio) + bio_put(bio); + while (req->bio) { + bio = req->bio; + req->bio = bio->bi_next; + bio_put(bio); + } + req->biotail = NULL; return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; } -- 2.25.1

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[PATCH kernel-4.19 09/19] x86/build: Turn off -fcf-protection for realmode targets
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Arnd Bergmann <arnd(a)arndb.de> [ Upstream commit 9fcb51c14da2953de585c5c6e50697b8a6e91a7b ] The new Ubuntu GCC packages turn on -fcf-protection globally, which causes a build failure in the x86 realmode code: cc1: error: ‘-fcf-protection’ is not compatible with this target Turn it off explicitly on compilers that understand this option. Signed-off-by: Arnd Bergmann <arnd(a)arndb.de> Signed-off-by: Ingo Molnar <mingo(a)kernel.org> Link: https://lore.kernel.org/r/20210323124846.1584944-1-arnd@kernel.org Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- arch/x86/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/Makefile b/arch/x86/Makefile index 75200b421f29b..6ebdbad21fb2a 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -34,7 +34,7 @@ M16_CFLAGS := $(call cc-option, -m16, $(CODE16GCC_CFLAGS)) REALMODE_CFLAGS := $(M16_CFLAGS) -g -Os -DDISABLE_BRANCH_PROFILING \ -Wall -Wstrict-prototypes -march=i386 -mregparm=3 \ -fno-strict-aliasing -fomit-frame-pointer -fno-pic \ - -mno-mmx -mno-sse + -mno-mmx -mno-sse $(call cc-option,-fcf-protection=none) REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), -ffreestanding) REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), -fno-stack-protector) -- 2.25.1

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[PATCH kernel-4.19 08/19] platform/x86: thinkpad_acpi: Allow the FnLock LED to change state
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Esteve Varela Colominas <esteve.varela(a)gmail.com> [ Upstream commit 3d677f12ea3a2097a16ded570623567403dea959 ] On many recent ThinkPad laptops, there's a new LED next to the ESC key, that indicates the FnLock status. When the Fn+ESC combo is pressed, FnLock is toggled, which causes the Media Key functionality to change, making it so that the media keys either perform their media key function, or function as an F-key by default. The Fn key can be used the access the alternate function at any time. With the current linux kernel, the LED doens't change state if you press the Fn+ESC key combo. However, the media key functionality *does* change. This is annoying, since the LED will stay on if it was on during bootup, and it makes it hard to keep track what the current state of the FnLock is. This patch calls an ACPI function, that gets the current media key state, when the Fn+ESC key combo is pressed. Through testing it was discovered that this function causes the LED to update correctly to reflect the current state when this function is called. The relevant ACPI calls are the following: \_SB_.PCI0.LPC0.EC0_.HKEY.GMKS: Get media key state, returns 0x603 if the FnLock mode is enabled, and 0x602 if it's disabled. \_SB_.PCI0.LPC0.EC0_.HKEY.SMKS: Set media key state, sending a 1 will enable FnLock mode, and a 0 will disable it. Relevant discussion: https://bugzilla.kernel.org/show_bug.cgi?id=207841 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1881015 Signed-off-by: Esteve Varela Colominas <esteve.varela(a)gmail.com> Link: https://lore.kernel.org/r/20210315195823.23212-1-esteve.varela@gmail.com Signed-off-by: Hans de Goede <hdegoede(a)redhat.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/platform/x86/thinkpad_acpi.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index a6e69f2495d23..559698640fe29 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -4102,13 +4102,19 @@ static bool hotkey_notify_6xxx(const u32 hkey, case TP_HKEY_EV_KEY_NUMLOCK: case TP_HKEY_EV_KEY_FN: - case TP_HKEY_EV_KEY_FN_ESC: /* key press events, we just ignore them as long as the EC * is still reporting them in the normal keyboard stream */ *send_acpi_ev = false; *ignore_acpi_ev = true; return true; + case TP_HKEY_EV_KEY_FN_ESC: + /* Get the media key status to foce the status LED to update */ + acpi_evalf(hkey_handle, NULL, "GMKS", "v"); + *send_acpi_ev = false; + *ignore_acpi_ev = true; + return true; + case TP_HKEY_EV_TABLET_CHANGED: tpacpi_input_send_tabletsw(); hotkey_tablet_mode_notify_change(); -- 2.25.1

1 0

[PATCH kernel-4.19 07/19] drm/msm: Ratelimit invalid-fence message
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Rob Clark <robdclark(a)chromium.org> [ Upstream commit 7ad48d27a2846bfda29214fb454d001c3e02b9e7 ] We have seen a couple cases where low memory situations cause something bad to happen, followed by a flood of these messages obscuring the root cause. Lets ratelimit the dmesg spam so that next time it happens we don't lose the kernel traces leading up to this. Signed-off-by: Rob Clark <robdclark(a)chromium.org> Reviewed-by: Douglas Anderson <dianders(a)chromium.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/gpu/drm/msm/msm_fence.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/msm/msm_fence.c b/drivers/gpu/drm/msm/msm_fence.c index 349c12f670eb8..6c11be79574e5 100644 --- a/drivers/gpu/drm/msm/msm_fence.c +++ b/drivers/gpu/drm/msm/msm_fence.c @@ -56,7 +56,7 @@ int msm_wait_fence(struct msm_fence_context *fctx, uint32_t fence, int ret; if (fence > fctx->last_fence) { - DRM_ERROR("%s: waiting on invalid fence: %u (of %u)\n", + DRM_ERROR_RATELIMITED("%s: waiting on invalid fence: %u (of %u)\n", fctx->name, fence, fctx->last_fence); return -EINVAL; } -- 2.25.1

1 0

[PATCH kernel-4.19 06/19] mac80211: choose first enabled channel for monitor
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Karthikeyan Kathirvel <kathirve(a)codeaurora.org> [ Upstream commit 041c881a0ba8a75f71118bd9766b78f04beed469 ] Even if the first channel from sband channel list is invalid or disabled mac80211 ends up choosing it as the default channel for monitor interfaces, making them not usable. Fix this by assigning the first available valid or enabled channel instead. Signed-off-by: Karthikeyan Kathirvel <kathirve(a)codeaurora.org> Link: https://lore.kernel.org/r/1615440547-7661-1-git-send-email-kathirve@codeaur… [reword commit message, comment, code cleanups] Signed-off-by: Johannes Berg <johannes.berg(a)intel.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- net/mac80211/main.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 68db2a3564431..f44d00f35fe7b 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -931,8 +931,19 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) continue; if (!dflt_chandef.chan) { + /* + * Assign the first enabled channel to dflt_chandef + * from the list of channels + */ + for (i = 0; i < sband->n_channels; i++) + if (!(sband->channels[i].flags & + IEEE80211_CHAN_DISABLED)) + break; + /* if none found then use the first anyway */ + if (i == sband->n_channels) + i = 0; cfg80211_chandef_create(&dflt_chandef, - &sband->channels[0], + &sband->channels[i], NL80211_CHAN_NO_HT); /* init channel we're on */ if (!local->use_chanctx && !local->_oper_chandef.chan) { -- 2.25.1

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