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[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

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[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

1 0

[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

1 0

[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

1 0

[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

1 0

[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

1 0

[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

1 0

[PATCH kernel-4.19 05/19] mISDN: fix crash in fritzpci
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Tong Zhang <ztong0001(a)gmail.com> [ Upstream commit a9f81244d2e33e6dfcef120fefd30c96b3f7cdb0 ] setup_fritz() in avmfritz.c might fail with -EIO and in this case the isac.type and isac.write_reg is not initialized and remains 0(NULL). A subsequent call to isac_release() will dereference isac->write_reg and crash. [ 1.737444] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 1.737809] #PF: supervisor instruction fetch in kernel mode [ 1.738106] #PF: error_code(0x0010) - not-present page [ 1.738378] PGD 0 P4D 0 [ 1.738515] Oops: 0010 [#1] SMP NOPTI [ 1.738711] CPU: 0 PID: 180 Comm: systemd-udevd Not tainted 5.12.0-rc2+ #78 [ 1.739077] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-48-gd9c812dda519-p rebuilt.qemu.org 04/01/2014 [ 1.739664] RIP: 0010:0x0 [ 1.739807] Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6. [ 1.740200] RSP: 0018:ffffc9000027ba10 EFLAGS: 00010202 [ 1.740478] RAX: 0000000000000000 RBX: ffff888102f41840 RCX: 0000000000000027 [ 1.740853] RDX: 00000000000000ff RSI: 0000000000000020 RDI: ffff888102f41800 [ 1.741226] RBP: ffffc9000027ba20 R08: ffff88817bc18440 R09: ffffc9000027b808 [ 1.741600] R10: 0000000000000001 R11: 0000000000000001 R12: ffff888102f41840 [ 1.741976] R13: 00000000fffffffb R14: ffff888102f41800 R15: ffff8881008b0000 [ 1.742351] FS: 00007fda3a38a8c0(0000) GS:ffff88817bc00000(0000) knlGS:0000000000000000 [ 1.742774] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1.743076] CR2: ffffffffffffffd6 CR3: 00000001021ec000 CR4: 00000000000006f0 [ 1.743452] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1.743828] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1.744206] Call Trace: [ 1.744339] isac_release+0xcc/0xe0 [mISDNipac] [ 1.744582] fritzpci_probe.cold+0x282/0x739 [avmfritz] [ 1.744861] local_pci_probe+0x48/0x80 [ 1.745063] pci_device_probe+0x10f/0x1c0 [ 1.745278] really_probe+0xfb/0x420 [ 1.745471] driver_probe_device+0xe9/0x160 [ 1.745693] device_driver_attach+0x5d/0x70 [ 1.745917] __driver_attach+0x8f/0x150 [ 1.746123] ? device_driver_attach+0x70/0x70 [ 1.746354] bus_for_each_dev+0x7e/0xc0 [ 1.746560] driver_attach+0x1e/0x20 [ 1.746751] bus_add_driver+0x152/0x1f0 [ 1.746957] driver_register+0x74/0xd0 [ 1.747157] ? 0xffffffffc00d8000 [ 1.747334] __pci_register_driver+0x54/0x60 [ 1.747562] AVM_init+0x36/0x1000 [avmfritz] [ 1.747791] do_one_initcall+0x48/0x1d0 [ 1.747997] ? __cond_resched+0x19/0x30 [ 1.748206] ? kmem_cache_alloc_trace+0x390/0x440 [ 1.748458] ? do_init_module+0x28/0x250 [ 1.748669] do_init_module+0x62/0x250 [ 1.748870] load_module+0x23ee/0x26a0 [ 1.749073] __do_sys_finit_module+0xc2/0x120 [ 1.749307] ? __do_sys_finit_module+0xc2/0x120 [ 1.749549] __x64_sys_finit_module+0x1a/0x20 [ 1.749782] do_syscall_64+0x38/0x90 Signed-off-by: Tong Zhang <ztong0001(a)gmail.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/isdn/hardware/mISDN/mISDNipac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/isdn/hardware/mISDN/mISDNipac.c b/drivers/isdn/hardware/mISDN/mISDNipac.c index 4d78f870435ec..71e635d6c64a2 100644 --- a/drivers/isdn/hardware/mISDN/mISDNipac.c +++ b/drivers/isdn/hardware/mISDN/mISDNipac.c @@ -710,7 +710,7 @@ isac_release(struct isac_hw *isac) { if (isac->type & IPAC_TYPE_ISACX) WriteISAC(isac, ISACX_MASK, 0xff); - else + else if (isac->type != 0) WriteISAC(isac, ISAC_MASK, 0xff); if (isac->dch.timer.function != NULL) { del_timer(&isac->dch.timer); -- 2.25.1

1 0

[PATCH kernel-4.19 03/19] platform/x86: intel-hid: Support Lenovo ThinkPad X1 Tablet Gen 2
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Alban Bedel <albeu(a)free.fr> [ Upstream commit 56678a5f44ef5f0ad9a67194bbee2280c6286534 ] Like a few other system the Lenovo ThinkPad X1 Tablet Gen 2 miss the HEBC method, which prevent the power button from working. Add a quirk to enable the button array on this system family and fix the power button. Signed-off-by: Alban Bedel <albeu(a)free.fr> Tested-by: Alexander Kobel <a-kobel(a)a-kobel.de> Link: https://lore.kernel.org/r/20210222141559.3775-1-albeu@free.fr Signed-off-by: Hans de Goede <hdegoede(a)redhat.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/platform/x86/intel-hid.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/platform/x86/intel-hid.c b/drivers/platform/x86/intel-hid.c index d7d69eadb9bba..fa3cda69cec96 100644 --- a/drivers/platform/x86/intel-hid.c +++ b/drivers/platform/x86/intel-hid.c @@ -94,6 +94,13 @@ static const struct dmi_system_id button_array_table[] = { DMI_MATCH(DMI_PRODUCT_NAME, "HP Spectre x2 Detachable"), }, }, + { + .ident = "Lenovo ThinkPad X1 Tablet Gen 2", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_FAMILY, "ThinkPad X1 Tablet Gen 2"), + }, + }, { } }; -- 2.25.1

1 0

[PATCH kernel-4.19 01/19] ARM: dts: am33xx: add aliases for mmc interfaces
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Mans Rullgard <mans(a)mansr.com> [ Upstream commit 9bbce32a20d6a72c767a7f85fd6127babd1410ac ] Without DT aliases, the numbering of mmc interfaces is unpredictable. Adding them makes it possible to refer to devices consistently. The popular suggestion to use UUIDs obviously doesn't work with a blank device fresh from the factory. See commit fa2d0aa96941 ("mmc: core: Allow setting slot index via device tree alias") for more discussion. Signed-off-by: Mans Rullgard <mans(a)mansr.com> Signed-off-by: Tony Lindgren <tony(a)atomide.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- arch/arm/boot/dts/am33xx.dtsi | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi index d3dd6a16e70a7..e321acaf35d66 100644 --- a/arch/arm/boot/dts/am33xx.dtsi +++ b/arch/arm/boot/dts/am33xx.dtsi @@ -39,6 +39,9 @@ ethernet1 = &cpsw_emac1; spi0 = &spi0; spi1 = &spi1; + mmc0 = &mmc1; + mmc1 = &mmc2; + mmc2 = &mmc3; }; cpus { -- 2.25.1

1 0

[PATCH openEuler-1.0-LTS 000/769] 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 (247): 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 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 | 8811 ++++++++++++++++++++++ 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, 13739 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

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[PATCH kernel-4.19 55/57] staging: rtl8192e: Change state information from u16 to u8
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Atul Gopinathan <atulgopinathan(a)gmail.com> commit e78836ae76d20f38eed8c8c67f21db97529949da upstream. The "u16 CcxRmState[2];" array field in struct "rtllib_network" has 4 bytes in total while the operations performed on this array through-out the code base are only 2 bytes. The "CcxRmState" field is fed only 2 bytes of data using memcpy(): (In rtllib_rx.c:1972) memcpy(network->CcxRmState, &info_element->data[4], 2) With "info_element->data[]" being a u8 array, if 2 bytes are written into "CcxRmState" (whose one element is u16 size), then the 2 u8 elements from "data[]" gets squashed and written into the first element ("CcxRmState[0]") while the second element ("CcxRmState[1]") is never fed with any data. Same in file rtllib_rx.c:2522: memcpy(dst->CcxRmState, src->CcxRmState, 2); The above line duplicates "src" data to "dst" but only writes 2 bytes (and not 4, which is the actual size). Again, only 1st element gets the value while the 2nd element remains uninitialized. This later makes operations done with CcxRmState unpredictable in the following lines as the 1st element is having a squashed number while the 2nd element is having an uninitialized random number. rtllib_rx.c:1973: if (network->CcxRmState[0] != 0) rtllib_rx.c:1977: network->MBssidMask = network->CcxRmState[1] & 0x07; network->MBssidMask is also of type u8 and not u16. Fix this by changing the type of "CcxRmState" from u16 to u8 so that the data written into this array and read from it make sense and are not random values. NOTE: The wrong initialization of "CcxRmState" can be seen in the following commit: commit ecdfa44610fa ("Staging: add Realtek 8192 PCI wireless driver") The above commit created a file `rtl8192e/ieee80211.h` which used to have the faulty line. The file has been deleted (or possibly renamed) with the contents copied in to a new file `rtl8192e/rtllib.h` along with additional code in the commit 94a799425eee (tagged in Fixes). Fixes: 94a799425eee ("From: wlanfae <wlanfae(a)realtek.com> [PATCH 1/8] rtl8192e: Import new version of driver from realtek") Cc: stable(a)vger.kernel.org Signed-off-by: Atul Gopinathan <atulgopinathan(a)gmail.com> Link: https://lore.kernel.org/r/20210323113413.29179-2-atulgopinathan@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/staging/rtl8192e/rtllib.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/rtl8192e/rtllib.h b/drivers/staging/rtl8192e/rtllib.h index c01474a6db1e8..2574275475d16 100644 --- a/drivers/staging/rtl8192e/rtllib.h +++ b/drivers/staging/rtl8192e/rtllib.h @@ -1110,7 +1110,7 @@ struct rtllib_network { bool bWithAironetIE; bool bCkipSupported; bool bCcxRmEnable; - u16 CcxRmState[2]; + u8 CcxRmState[2]; bool bMBssidValid; u8 MBssidMask; u8 MBssid[ETH_ALEN]; -- 2.25.1

1 0

[PATCH kernel-4.19 54/57] staging: rtl8192e: Fix incorrect source in memcpy()
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Atul Gopinathan <atulgopinathan(a)gmail.com> commit 72ad25fbbb78930f892b191637359ab5b94b3190 upstream. The variable "info_element" is of the following type: struct rtllib_info_element *info_element defined in drivers/staging/rtl8192e/rtllib.h: struct rtllib_info_element { u8 id; u8 len; u8 data[]; } __packed; The "len" field defines the size of the "data[]" array. The code is supposed to check if "info_element->len" is greater than 4 and later equal to 6. If this is satisfied then, the last two bytes (the 4th and 5th element of u8 "data[]" array) are copied into "network->CcxRmState". Right now the code uses "memcpy()" with the source as "&info_element[4]" which would copy in wrong and unintended information. The struct "rtllib_info_element" has a size of 2 bytes for "id" and "len", therefore indexing will be done in interval of 2 bytes. So, "info_element[4]" would point to data which is beyond the memory allocated for this pointer (that is, at x+8, while "info_element" has been allocated only from x to x+7 (2 + 6 => 8 bytes)). This patch rectifies this error by using "&info_element->data[4]" which correctly copies the last two bytes of "data[]". NOTE: The faulty line of code came from the following commit: commit ecdfa44610fa ("Staging: add Realtek 8192 PCI wireless driver") The above commit created the file `rtl8192e/ieee80211/ieee80211_rx.c` which had the faulty line of code. This file has been deleted (or possibly renamed) with the contents copied in to a new file `rtl8192e/rtllib_rx.c` along with additional code in the commit 94a799425eee (tagged in Fixes). Fixes: 94a799425eee ("From: wlanfae <wlanfae(a)realtek.com> [PATCH 1/8] rtl8192e: Import new version of driver from realtek") Cc: stable(a)vger.kernel.org Signed-off-by: Atul Gopinathan <atulgopinathan(a)gmail.com> Link: https://lore.kernel.org/r/20210323113413.29179-1-atulgopinathan@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/staging/rtl8192e/rtllib_rx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/rtl8192e/rtllib_rx.c b/drivers/staging/rtl8192e/rtllib_rx.c index fa580ce1cf43d..3bfd63fe4ac10 100644 --- a/drivers/staging/rtl8192e/rtllib_rx.c +++ b/drivers/staging/rtl8192e/rtllib_rx.c @@ -1978,7 +1978,7 @@ static void rtllib_parse_mife_generic(struct rtllib_device *ieee, info_element->data[2] == 0x96 && info_element->data[3] == 0x01) { if (info_element->len == 6) { - memcpy(network->CcxRmState, &info_element[4], 2); + memcpy(network->CcxRmState, &info_element->data[4], 2); if (network->CcxRmState[0] != 0) network->bCcxRmEnable = true; else -- 2.25.1

1 0

[PATCH kernel-4.19 53/57] usb: dwc2: Fix HPRT0.PrtSusp bit setting for HiKey 960 board.
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Artur Petrosyan <Arthur.Petrosyan(a)synopsys.com> commit 5e3bbae8ee3d677a0aa2919dc62b5c60ea01ba61 upstream. Increased the waiting timeout for HPRT0.PrtSusp register field to be set, because on HiKey 960 board HPRT0.PrtSusp wasn't generated with the existing timeout. Cc: <stable(a)vger.kernel.org> # 4.18 Fixes: 22bb5cfdf13a ("usb: dwc2: Fix host exit from hibernation flow.") Signed-off-by: Artur Petrosyan <Arthur.Petrosyan(a)synopsys.com> Acked-by: Minas Harutyunyan <Minas.Harutyunyan(a)synopsys.com> Link: https://lore.kernel.org/r/20210326102447.8F7FEA005D@mailhost.synopsys.com Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/usb/dwc2/hcd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index 56a35e0160392..91686e1b24d97 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -5560,7 +5560,7 @@ int dwc2_host_enter_hibernation(struct dwc2_hsotg *hsotg) dwc2_writel(hsotg, hprt0, HPRT0); /* Wait for the HPRT0.PrtSusp register field to be set */ - if (dwc2_hsotg_wait_bit_set(hsotg, HPRT0, HPRT0_SUSP, 3000)) + if (dwc2_hsotg_wait_bit_set(hsotg, HPRT0, HPRT0_SUSP, 5000)) dev_warn(hsotg->dev, "Suspend wasn't generated\n"); /* -- 2.25.1

1 0

[PATCH kernel-4.19 52/57] usb: gadget: udc: amd5536udc_pci fix null-ptr-dereference
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Tong Zhang <ztong0001(a)gmail.com> commit 72035f4954f0bca2d8c47cf31b3629c42116f5b7 upstream. init_dma_pools() calls dma_pool_create(...dev->dev) to create dma pool. however, dev->dev is actually set after calling init_dma_pools(), which effectively makes dma_pool_create(..NULL) and cause crash. To fix this issue, init dma only after dev->dev is set. [ 1.317993] RIP: 0010:dma_pool_create+0x83/0x290 [ 1.323257] Call Trace: [ 1.323390] ? pci_write_config_word+0x27/0x30 [ 1.323626] init_dma_pools+0x41/0x1a0 [snps_udc_core] [ 1.323899] udc_pci_probe+0x202/0x2b1 [amd5536udc_pci] Fixes: 7c51247a1f62 (usb: gadget: udc: Provide correct arguments for 'dma_pool_create') Cc: stable <stable(a)vger.kernel.org> Signed-off-by: Tong Zhang <ztong0001(a)gmail.com> Link: https://lore.kernel.org/r/20210317230400.357756-1-ztong0001@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/usb/gadget/udc/amd5536udc_pci.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/usb/gadget/udc/amd5536udc_pci.c b/drivers/usb/gadget/udc/amd5536udc_pci.c index 57b6f66331cfa..362284057d307 100644 --- a/drivers/usb/gadget/udc/amd5536udc_pci.c +++ b/drivers/usb/gadget/udc/amd5536udc_pci.c @@ -154,6 +154,11 @@ static int udc_pci_probe( pci_set_master(pdev); pci_try_set_mwi(pdev); + dev->phys_addr = resource; + dev->irq = pdev->irq; + dev->pdev = pdev; + dev->dev = &pdev->dev; + /* init dma pools */ if (use_dma) { retval = init_dma_pools(dev); @@ -161,11 +166,6 @@ static int udc_pci_probe( goto err_dma; } - dev->phys_addr = resource; - dev->irq = pdev->irq; - dev->pdev = pdev; - dev->dev = &pdev->dev; - /* general probing */ if (udc_probe(dev)) { retval = -ENODEV; -- 2.25.1

1 0

[PATCH kernel-4.19 51/57] USB: cdc-acm: fix use-after-free after probe failure
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Johan Hovold <johan(a)kernel.org> commit 4e49bf376c0451ad2eae2592e093659cde12be9a upstream. If tty-device registration fails the driver would fail to release the data interface. When the device is later disconnected, the disconnect callback would still be called for the data interface and would go about releasing already freed resources. Fixes: c93d81955005 ("usb: cdc-acm: fix error handling in acm_probe()") Cc: stable(a)vger.kernel.org # 3.9 Cc: Alexey Khoroshilov <khoroshilov(a)ispras.ru> Acked-by: Oliver Neukum <oneukum(a)suse.com> Signed-off-by: Johan Hovold <johan(a)kernel.org> Link: https://lore.kernel.org/r/20210322155318.9837-3-johan@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/usb/class/cdc-acm.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 50d2c8e01cdd3..a1fa16a03ab9d 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -1561,6 +1561,11 @@ static int acm_probe(struct usb_interface *intf, return 0; alloc_fail6: + if (!acm->combined_interfaces) { + /* Clear driver data so that disconnect() returns early. */ + usb_set_intfdata(data_interface, NULL); + usb_driver_release_interface(&acm_driver, data_interface); + } if (acm->country_codes) { device_remove_file(&acm->control->dev, &dev_attr_wCountryCodes); -- 2.25.1

1 0

[PATCH kernel-4.19 50/57] USB: cdc-acm: fix double free on probe failure
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Johan Hovold <johan(a)kernel.org> commit 7180495cb3d0e2a2860d282a468b4146c21da78f upstream. If tty-device registration fails the driver copy of any Country Selection functional descriptor would end up being freed twice; first explicitly in the error path and then again in the tty-port destructor. Drop the first erroneous free that was left when fixing a tty-port resource leak. Fixes: cae2bc768d17 ("usb: cdc-acm: Decrement tty port's refcount if probe() fail") Cc: stable(a)vger.kernel.org # 4.19 Cc: Jaejoong Kim <climbbb.kim(a)gmail.com> Acked-by: Oliver Neukum <oneukum(a)suse.com> Signed-off-by: Johan Hovold <johan(a)kernel.org> Link: https://lore.kernel.org/r/20210322155318.9837-2-johan@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/usb/class/cdc-acm.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index c3c7852dd04c2..50d2c8e01cdd3 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -1566,7 +1566,6 @@ static int acm_probe(struct usb_interface *intf, &dev_attr_wCountryCodes); device_remove_file(&acm->control->dev, &dev_attr_iCountryCodeRelDate); - kfree(acm->country_codes); } device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); alloc_fail5: -- 2.25.1

1 0

[PATCH kernel-4.19 49/57] USB: cdc-acm: downgrade message to debug
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Oliver Neukum <oneukum(a)suse.com> commit e4c77070ad45fc940af1d7fb1e637c349e848951 upstream. This failure is so common that logging an error here amounts to spamming log files. Reviewed-by: Bruno Thomsen <bruno.thomsen(a)gmail.com> Signed-off-by: Oliver Neukum <oneukum(a)suse.com> Cc: stable <stable(a)vger.kernel.org> Link: https://lore.kernel.org/r/20210311130126.15972-2-oneukum@suse.com Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/usb/class/cdc-acm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 64dd96436f59d..c3c7852dd04c2 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -664,7 +664,8 @@ static void acm_port_dtr_rts(struct tty_port *port, int raise) res = acm_set_control(acm, val); if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) - dev_err(&acm->control->dev, "failed to set dtr/rts\n"); + /* This is broken in too many devices to spam the logs */ + dev_dbg(&acm->control->dev, "failed to set dtr/rts\n"); } static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) -- 2.25.1

1 0

[PATCH kernel-4.19 48/57] USB: cdc-acm: untangle a circular dependency between callback and softint
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Oliver Neukum <oneukum(a)suse.com> commit 6069e3e927c8fb3a1947b07d1a561644ea960248 upstream. We have a cycle of callbacks scheduling works which submit URBs with thos callbacks. This needs to be blocked, stopped and unblocked to untangle the circle. The issue leads to faults like: [ 55.068392] Unable to handle kernel paging request at virtual address 6b6b6c03 [ 55.075624] pgd = be866494 [ 55.078335] [6b6b6c03] *pgd=00000000 [ 55.081924] Internal error: Oops: 5 [#1] PREEMPT SMP ARM [ 55.087238] Modules linked in: ppp_async crc_ccitt ppp_generic slhc xt_TCPMSS xt_tcpmss xt_hl nf_log_ipv6 nf_log_ipv4 nf_log_common xt_policy xt_limit xt_conntrack xt_tcpudp xt_pkttype ip6table_mangle iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_mangle ip6table_filter ip6_tables iptable_filter ip_tables des_generic md5 sch_fq_codel cdc_mbim cdc_wdm cdc_ncm usbnet mii cdc_acm usb_storage ip_tunnel xfrm_user xfrm6_tunnel tunnel6 xfrm4_tunnel tunnel4 esp6 esp4 ah6 ah4 xfrm_algo xt_LOG xt_LED xt_comment x_tables ipv6 [ 55.134954] CPU: 0 PID: 82 Comm: kworker/0:2 Tainted: G T 5.8.17 #1 [ 55.142526] Hardware name: Freescale i.MX7 Dual (Device Tree) [ 55.148304] Workqueue: events acm_softint [cdc_acm] [ 55.153196] PC is at kobject_get+0x10/0xa4 [ 55.157302] LR is at usb_get_dev+0x14/0x1c [ 55.161402] pc : [<8047c06c>] lr : [<80560448>] psr: 20000193 [ 55.167671] sp : bca39ea8 ip : 00007374 fp : bf6cbd80 [ 55.172899] r10: 00000000 r9 : bdd92284 r8 : bdd92008 [ 55.178128] r7 : 6b6b6b6b r6 : fffffffe r5 : 60000113 r4 : 6b6b6be3 [ 55.184658] r3 : 6b6b6b6b r2 : 00000111 r1 : 00000000 r0 : 6b6b6be3 [ 55.191191] Flags: nzCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment none [ 55.198417] Control: 10c5387d Table: bcf0c06a DAC: 00000051 [ 55.204168] Process kworker/0:2 (pid: 82, stack limit = 0x9bdd2a89) [ 55.210439] Stack: (0xbca39ea8 to 0xbca3a000) [ 55.214805] 9ea0: bf6cbd80 80769a50 6b6b6b6b 80560448 bdeb0500 8056bfe8 [ 55.222991] 9ec0: 00000002 b76da000 00000000 bdeb0500 bdd92448 bca38000 bdeb0510 8056d69c [ 55.231177] 9ee0: bca38000 00000000 80c050fc 00000000 bca39f44 09d42015 00000000 00000001 [ 55.239363] 9f00: bdd92448 bdd92438 bdd92000 7f1158c4 bdd92448 bca2ee00 bf6cbd80 bf6cef00 [ 55.247549] 9f20: 00000000 00000000 00000000 801412d8 bf6cbd98 80c03d00 bca2ee00 bf6cbd80 [ 55.255735] 9f40: bca2ee14 bf6cbd98 80c03d00 00000008 bca38000 80141568 00000000 80c446ae [ 55.263921] 9f60: 00000000 bc9ed880 bc9f0700 bca38000 bc117eb4 80141524 bca2ee00 bc9ed8a4 [ 55.272107] 9f80: 00000000 80147cc8 00000000 bc9f0700 80147b84 00000000 00000000 00000000 [ 55.280292] 9fa0: 00000000 00000000 00000000 80100148 00000000 00000000 00000000 00000000 [ 55.288477] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 55.296662] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000 [ 55.304860] [<8047c06c>] (kobject_get) from [<80560448>] (usb_get_dev+0x14/0x1c) [ 55.312271] [<80560448>] (usb_get_dev) from [<8056bfe8>] (usb_hcd_unlink_urb+0x50/0xd8) [ 55.320286] [<8056bfe8>] (usb_hcd_unlink_urb) from [<8056d69c>] (usb_kill_urb.part.0+0x44/0xd0) [ 55.329004] [<8056d69c>] (usb_kill_urb.part.0) from [<7f1158c4>] (acm_softint+0x4c/0x10c [cdc_acm]) [ 55.338082] [<7f1158c4>] (acm_softint [cdc_acm]) from [<801412d8>] (process_one_work+0x19c/0x3e8) [ 55.346969] [<801412d8>] (process_one_work) from [<80141568>] (worker_thread+0x44/0x4dc) [ 55.355072] [<80141568>] (worker_thread) from [<80147cc8>] (kthread+0x144/0x180) [ 55.362481] [<80147cc8>] (kthread) from [<80100148>] (ret_from_fork+0x14/0x2c) [ 55.369706] Exception stack(0xbca39fb0 to 0xbca39ff8) Tested-by: Bruno Thomsen <bruno.thomsen(a)gmail.com> Signed-off-by: Oliver Neukum <oneukum(a)suse.com> Cc: stable <stable(a)vger.kernel.org> Link: https://lore.kernel.org/r/20210311130126.15972-1-oneukum@suse.com Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/usb/class/cdc-acm.c | 48 ++++++++++++++++++++++++------------- 1 file changed, 32 insertions(+), 16 deletions(-) diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 7a38d2899cc32..64dd96436f59d 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -147,17 +147,29 @@ static inline int acm_set_control(struct acm *acm, int control) #define acm_send_break(acm, ms) \ acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) -static void acm_kill_urbs(struct acm *acm) +static void acm_poison_urbs(struct acm *acm) { int i; - usb_kill_urb(acm->ctrlurb); + usb_poison_urb(acm->ctrlurb); for (i = 0; i < ACM_NW; i++) - usb_kill_urb(acm->wb[i].urb); + usb_poison_urb(acm->wb[i].urb); for (i = 0; i < acm->rx_buflimit; i++) - usb_kill_urb(acm->read_urbs[i]); + usb_poison_urb(acm->read_urbs[i]); +} + +static void acm_unpoison_urbs(struct acm *acm) +{ + int i; + + for (i = 0; i < acm->rx_buflimit; i++) + usb_unpoison_urb(acm->read_urbs[i]); + for (i = 0; i < ACM_NW; i++) + usb_unpoison_urb(acm->wb[i].urb); + usb_unpoison_urb(acm->ctrlurb); } + /* * Write buffer management. * All of these assume proper locks taken by the caller. @@ -225,9 +237,10 @@ static int acm_start_wb(struct acm *acm, struct acm_wb *wb) rc = usb_submit_urb(wb->urb, GFP_ATOMIC); if (rc < 0) { - dev_err(&acm->data->dev, - "%s - usb_submit_urb(write bulk) failed: %d\n", - __func__, rc); + if (rc != -EPERM) + dev_err(&acm->data->dev, + "%s - usb_submit_urb(write bulk) failed: %d\n", + __func__, rc); acm_write_done(acm, wb); } return rc; @@ -482,11 +495,6 @@ static void acm_read_bulk_callback(struct urb *urb) dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n", rb->index, urb->actual_length, status); - if (!acm->dev) { - dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__); - return; - } - switch (status) { case 0: usb_mark_last_busy(acm->dev); @@ -741,6 +749,7 @@ static void acm_port_shutdown(struct tty_port *port) * Need to grab write_lock to prevent race with resume, but no need to * hold it due to the tty-port initialised flag. */ + acm_poison_urbs(acm); spin_lock_irq(&acm->write_lock); spin_unlock_irq(&acm->write_lock); @@ -757,7 +766,8 @@ static void acm_port_shutdown(struct tty_port *port) usb_autopm_put_interface_async(acm->control); } - acm_kill_urbs(acm); + acm_unpoison_urbs(acm); + } static void acm_tty_cleanup(struct tty_struct *tty) @@ -1587,8 +1597,14 @@ static void acm_disconnect(struct usb_interface *intf) if (!acm) return; - mutex_lock(&acm->mutex); acm->disconnected = true; + /* + * there is a circular dependency. acm_softint() can resubmit + * the URBs in error handling so we need to block any + * submission right away + */ + acm_poison_urbs(acm); + mutex_lock(&acm->mutex); if (acm->country_codes) { device_remove_file(&acm->control->dev, &dev_attr_wCountryCodes); @@ -1607,7 +1623,6 @@ static void acm_disconnect(struct usb_interface *intf) tty_kref_put(tty); } - acm_kill_urbs(acm); cancel_delayed_work_sync(&acm->dwork); tty_unregister_device(acm_tty_driver, acm->minor); @@ -1649,7 +1664,7 @@ static int acm_suspend(struct usb_interface *intf, pm_message_t message) if (cnt) return 0; - acm_kill_urbs(acm); + acm_poison_urbs(acm); cancel_delayed_work_sync(&acm->dwork); acm->urbs_in_error_delay = 0; @@ -1662,6 +1677,7 @@ static int acm_resume(struct usb_interface *intf) struct urb *urb; int rv = 0; + acm_unpoison_urbs(acm); spin_lock_irq(&acm->write_lock); if (--acm->susp_count) -- 2.25.1

1 0

[PATCH kernel-4.19 47/57] cdc-acm: fix BREAK rx code path adding necessary calls
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Oliver Neukum <oneukum(a)suse.com> commit 08dff274edda54310d6f1cf27b62fddf0f8d146e upstream. Counting break events is nice but we should actually report them to the tty layer. Fixes: 5a6a62bdb9257 ("cdc-acm: add TIOCMIWAIT") Signed-off-by: Oliver Neukum <oneukum(a)suse.com> Link: https://lore.kernel.org/r/20210311133714.31881-1-oneukum@suse.com Cc: stable <stable(a)vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/usb/class/cdc-acm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index c523dfe408d51..7a38d2899cc32 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -312,8 +312,10 @@ static void acm_process_notification(struct acm *acm, unsigned char *buf) acm->iocount.dsr++; if (difference & ACM_CTRL_DCD) acm->iocount.dcd++; - if (newctrl & ACM_CTRL_BRK) + if (newctrl & ACM_CTRL_BRK) { acm->iocount.brk++; + tty_insert_flip_char(&acm->port, 0, TTY_BREAK); + } if (newctrl & ACM_CTRL_RI) acm->iocount.rng++; if (newctrl & ACM_CTRL_FRAMING) -- 2.25.1

1 0

[PATCH kernel-4.19 46/57] usb: xhci-mtk: fix broken streams issue on 0.96 xHCI
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Chunfeng Yun <chunfeng.yun(a)mediatek.com> commit 6f978a30c9bb12dab1302d0f06951ee290f5e600 upstream. The MediaTek 0.96 xHCI controller on some platforms does not support bulk stream even HCCPARAMS says supporting, due to MaxPSASize is set a default value 1 by mistake, here use XHCI_BROKEN_STREAMS quirk to fix it. Fixes: 94a631d91ad3 ("usb: xhci-mtk: check hcc_params after adding primary hcd") Cc: stable <stable(a)vger.kernel.org> Signed-off-by: Chunfeng Yun <chunfeng.yun(a)mediatek.com> Link: https://lore.kernel.org/r/1616482975-17841-4-git-send-email-chunfeng.yun@me… Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/usb/host/xhci-mtk.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c index 2c3b31109e168..09d5a789fcd5d 100644 --- a/drivers/usb/host/xhci-mtk.c +++ b/drivers/usb/host/xhci-mtk.c @@ -395,6 +395,13 @@ static void xhci_mtk_quirks(struct device *dev, struct xhci_hcd *xhci) xhci->quirks |= XHCI_SPURIOUS_SUCCESS; if (mtk->lpm_support) xhci->quirks |= XHCI_LPM_SUPPORT; + + /* + * MTK xHCI 0.96: PSA is 1 by default even if doesn't support stream, + * and it's 3 when support it. + */ + if (xhci->hci_version < 0x100 && HCC_MAX_PSA(xhci->hcc_params) == 4) + xhci->quirks |= XHCI_BROKEN_STREAMS; } /* called during probe() after chip reset completes */ @@ -551,7 +558,8 @@ static int xhci_mtk_probe(struct platform_device *pdev) if (ret) goto put_usb3_hcd; - if (HCC_MAX_PSA(xhci->hcc_params) >= 4) + if (HCC_MAX_PSA(xhci->hcc_params) >= 4 && + !(xhci->quirks & XHCI_BROKEN_STREAMS)) xhci->shared_hcd->can_do_streams = 1; ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED); -- 2.25.1

1 0

[PATCH kernel-4.19 45/57] usb: musb: Fix suspend with devices connected for a64
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Tony Lindgren <tony(a)atomide.com> commit 92af4fc6ec331228aca322ca37c8aea7b150a151 upstream. Pinephone running on Allwinner A64 fails to suspend with USB devices connected as reported by Bhushan Shah <bshah(a)kde.org>. Reverting commit 5fbf7a253470 ("usb: musb: fix idling for suspend after disconnect interrupt") fixes the issue. Let's add suspend checks also for suspend after disconnect interrupt quirk handling like we already do elsewhere. Fixes: 5fbf7a253470 ("usb: musb: fix idling for suspend after disconnect interrupt") Reported-by: Bhushan Shah <bshah(a)kde.org> Tested-by: Bhushan Shah <bshah(a)kde.org> Signed-off-by: Tony Lindgren <tony(a)atomide.com> Link: https://lore.kernel.org/r/20210324071142.42264-1-tony@atomide.com Cc: stable <stable(a)vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/usb/musb/musb_core.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index 9ce21b8caf35c..2a874058dff11 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -1868,10 +1868,14 @@ static void musb_pm_runtime_check_session(struct musb *musb) MUSB_DEVCTL_HR; switch (devctl & ~s) { case MUSB_QUIRK_B_DISCONNECT_99: - musb_dbg(musb, "Poll devctl in case of suspend after disconnect\n"); - schedule_delayed_work(&musb->irq_work, - msecs_to_jiffies(1000)); - break; + if (musb->quirk_retries && !musb->flush_irq_work) { + musb_dbg(musb, "Poll devctl in case of suspend after disconnect\n"); + schedule_delayed_work(&musb->irq_work, + msecs_to_jiffies(1000)); + musb->quirk_retries--; + break; + } + /* fall through */ case MUSB_QUIRK_B_INVALID_VBUS_91: if (musb->quirk_retries && !musb->flush_irq_work) { musb_dbg(musb, -- 2.25.1

1 0

[PATCH kernel-4.19 44/57] USB: quirks: ignore remote wake-up on Fibocom L850-GL LTE modem
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Vincent Palatin <vpalatin(a)chromium.org> commit 0bd860493f81eb2a46173f6f5e44cc38331c8dbd upstream. This LTE modem (M.2 card) has a bug in its power management: there is some kind of race condition for U3 wake-up between the host and the device. The modem firmware sometimes crashes/locks when both events happen at the same time and the modem fully drops off the USB bus (and sometimes re-enumerates, sometimes just gets stuck until the next reboot). Tested with the modem wired to the XHCI controller on an AMD 3015Ce platform. Without the patch, the modem dropped of the USB bus 5 times in 3 days. With the quirk, it stayed connected for a week while the 'runtime_suspended_time' counter incremented as excepted. Signed-off-by: Vincent Palatin <vpalatin(a)chromium.org> Link: https://lore.kernel.org/r/20210319124802.2315195-1-vpalatin@chromium.org Cc: stable <stable(a)vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/usb/core/quirks.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c index 239443ce52001..b8a4707dfafab 100644 --- a/drivers/usb/core/quirks.c +++ b/drivers/usb/core/quirks.c @@ -498,6 +498,10 @@ static const struct usb_device_id usb_quirk_list[] = { /* DJI CineSSD */ { USB_DEVICE(0x2ca3, 0x0031), .driver_info = USB_QUIRK_NO_LPM }, + /* Fibocom L850-GL LTE Modem */ + { USB_DEVICE(0x2cb7, 0x0007), .driver_info = + USB_QUIRK_IGNORE_REMOTE_WAKEUP }, + /* INTEL VALUE SSD */ { USB_DEVICE(0x8086, 0xf1a5), .driver_info = USB_QUIRK_RESET_RESUME }, -- 2.25.1

1 0

[PATCH kernel-4.19 43/57] usbip: vhci_hcd fix shift out-of-bounds in vhci_hub_control()
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Shuah Khan <skhan(a)linuxfoundation.org> commit 1cc5ed25bdade86de2650a82b2730108a76de20c upstream. Fix shift out-of-bounds in vhci_hub_control() SetPortFeature handling. UBSAN: shift-out-of-bounds in drivers/usb/usbip/vhci_hcd.c:605:42 shift exponent 768 is too large for 32-bit type 'int' Reported-by: syzbot+3dea30b047f41084de66(a)syzkaller.appspotmail.com Cc: stable(a)vger.kernel.org Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Link: https://lore.kernel.org/r/20210324230654.34798-1-skhan@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/usb/usbip/vhci_hcd.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c index 0909cfcbf7205..32a4dfeea06af 100644 --- a/drivers/usb/usbip/vhci_hcd.c +++ b/drivers/usb/usbip/vhci_hcd.c @@ -594,6 +594,8 @@ static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, pr_err("invalid port number %d\n", wIndex); goto error; } + if (wValue >= 32) + goto error; if (hcd->speed == HCD_USB3) { if ((vhci_hcd->port_status[rhport] & USB_SS_PORT_STAT_POWER) != 0) { -- 2.25.1

1 0

[PATCH kernel-4.19 42/57] firewire: nosy: Fix a use-after-free bug in nosy_ioctl()
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Zheyu Ma <zheyuma97(a)gmail.com> [ Upstream commit 829933ef05a951c8ff140e814656d73e74915faf ] For each device, the nosy driver allocates a pcilynx structure. A use-after-free might happen in the following scenario: 1. Open nosy device for the first time and call ioctl with command NOSY_IOC_START, then a new client A will be malloced and added to doubly linked list. 2. Open nosy device for the second time and call ioctl with command NOSY_IOC_START, then a new client B will be malloced and added to doubly linked list. 3. Call ioctl with command NOSY_IOC_START for client A, then client A will be readded to the doubly linked list. Now the doubly linked list is messed up. 4. Close the first nosy device and nosy_release will be called. In nosy_release, client A will be unlinked and freed. 5. Close the second nosy device, and client A will be referenced, resulting in UAF. The root cause of this bug is that the element in the doubly linked list is reentered into the list. Fix this bug by adding a check before inserting a client. If a client is already in the linked list, don't insert it. The following KASAN report reveals it: BUG: KASAN: use-after-free in nosy_release+0x1ea/0x210 Write of size 8 at addr ffff888102ad7360 by task poc CPU: 3 PID: 337 Comm: poc Not tainted 5.12.0-rc5+ #6 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 Call Trace: nosy_release+0x1ea/0x210 __fput+0x1e2/0x840 task_work_run+0xe8/0x180 exit_to_user_mode_prepare+0x114/0x120 syscall_exit_to_user_mode+0x1d/0x40 entry_SYSCALL_64_after_hwframe+0x44/0xae Allocated by task 337: nosy_open+0x154/0x4d0 misc_open+0x2ec/0x410 chrdev_open+0x20d/0x5a0 do_dentry_open+0x40f/0xe80 path_openat+0x1cf9/0x37b0 do_filp_open+0x16d/0x390 do_sys_openat2+0x11d/0x360 __x64_sys_open+0xfd/0x1a0 do_syscall_64+0x33/0x40 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 337: kfree+0x8f/0x210 nosy_release+0x158/0x210 __fput+0x1e2/0x840 task_work_run+0xe8/0x180 exit_to_user_mode_prepare+0x114/0x120 syscall_exit_to_user_mode+0x1d/0x40 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff888102ad7300 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 96 bytes inside of 128-byte region [ffff888102ad7300, ffff888102ad7380) [ Modified to use 'list_empty()' inside proper lock - Linus ] Link: https://lore.kernel.org/lkml/1617433116-5930-1-git-send-email-zheyuma97@gma… Reported-and-tested-by: 马哲宇 (Zheyu Ma) <zheyuma97(a)gmail.com> Signed-off-by: Zheyu Ma <zheyuma97(a)gmail.com> Cc: Greg Kroah-Hartman <greg(a)kroah.com> Cc: Stefan Richter <stefanr(a)s5r6.in-berlin.de> Signed-off-by: Linus Torvalds <torvalds(a)linux-foundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/firewire/nosy.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/firewire/nosy.c b/drivers/firewire/nosy.c index a128dd1126ae4..ac85e03e88e16 100644 --- a/drivers/firewire/nosy.c +++ b/drivers/firewire/nosy.c @@ -359,6 +359,7 @@ nosy_ioctl(struct file *file, unsigned int cmd, unsigned long arg) struct client *client = file->private_data; spinlock_t *client_list_lock = &client->lynx->client_list_lock; struct nosy_stats stats; + int ret; switch (cmd) { case NOSY_IOC_GET_STATS: @@ -373,11 +374,15 @@ nosy_ioctl(struct file *file, unsigned int cmd, unsigned long arg) return 0; case NOSY_IOC_START: + ret = -EBUSY; spin_lock_irq(client_list_lock); - list_add_tail(&client->link, &client->lynx->client_list); + if (list_empty(&client->link)) { + list_add_tail(&client->link, &client->lynx->client_list); + ret = 0; + } spin_unlock_irq(client_list_lock); - return 0; + return ret; case NOSY_IOC_STOP: spin_lock_irq(client_list_lock); -- 2.25.1

1 0

[PATCH kernel-4.19 41/57] extcon: Fix error handling in extcon_dev_register
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Dinghao Liu <dinghao.liu(a)zju.edu.cn> [ Upstream commit d3bdd1c3140724967ca4136755538fa7c05c2b4e ] When devm_kcalloc() fails, we should execute device_unregister() to unregister edev->dev from system. Fixes: 046050f6e623e ("extcon: Update the prototype of extcon_register_notifier() with enum extcon") Signed-off-by: Dinghao Liu <dinghao.liu(a)zju.edu.cn> Signed-off-by: Chanwoo Choi <cw00.choi(a)samsung.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/extcon/extcon.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c index b9d27c8fe57e6..e70f21ae85ffa 100644 --- a/drivers/extcon/extcon.c +++ b/drivers/extcon/extcon.c @@ -1256,6 +1256,7 @@ int extcon_dev_register(struct extcon_dev *edev) sizeof(*edev->nh), GFP_KERNEL); if (!edev->nh) { ret = -ENOMEM; + device_unregister(&edev->dev); goto err_dev; } -- 2.25.1

1 0

[PATCH kernel-4.19 40/57] extcon: Add stubs for extcon_register_notifier_all() functions
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Krzysztof Kozlowski <krzk(a)kernel.org> [ Upstream commit c9570d4a5efd04479b3cd09c39b571eb031d94f4 ] Add stubs for extcon_register_notifier_all() function for !CONFIG_EXTCON case. This is useful for compile testing and for drivers which use EXTCON but do not require it (therefore do not depend on CONFIG_EXTCON). Fixes: 815429b39d94 ("extcon: Add new extcon_register_notifier_all() to monitor all external connectors") Reported-by: kernel test robot <lkp(a)intel.com> Signed-off-by: Krzysztof Kozlowski <krzk(a)kernel.org> Signed-off-by: Chanwoo Choi <cw00.choi(a)samsung.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- include/linux/extcon.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/include/linux/extcon.h b/include/linux/extcon.h index 7f033b1ea5680..fdef4c784d03c 100644 --- a/include/linux/extcon.h +++ b/include/linux/extcon.h @@ -279,6 +279,29 @@ static inline void devm_extcon_unregister_notifier(struct device *dev, struct extcon_dev *edev, unsigned int id, struct notifier_block *nb) { } +static inline int extcon_register_notifier_all(struct extcon_dev *edev, + struct notifier_block *nb) +{ + return 0; +} + +static inline int extcon_unregister_notifier_all(struct extcon_dev *edev, + struct notifier_block *nb) +{ + return 0; +} + +static inline int devm_extcon_register_notifier_all(struct device *dev, + struct extcon_dev *edev, + struct notifier_block *nb) +{ + return 0; +} + +static inline void devm_extcon_unregister_notifier_all(struct device *dev, + struct extcon_dev *edev, + struct notifier_block *nb) { } + static inline struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name) { return ERR_PTR(-ENODEV); -- 2.25.1

1 0

[PATCH kernel-4.19 39/57] pinctrl: rockchip: fix restore error in resume
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Wang Panzhenzhuan <randy.wang(a)rock-chips.com> commit c971af25cda94afe71617790826a86253e88eab0 upstream. The restore in resume should match to suspend which only set for RK3288 SoCs pinctrl. Fixes: 8dca933127024 ("pinctrl: rockchip: save and restore gpio6_c6 pinmux in suspend/resume") Reviewed-by: Jianqun Xu <jay.xu(a)rock-chips.com> Reviewed-by: Heiko Stuebner <heiko(a)sntech.de> Signed-off-by: Wang Panzhenzhuan <randy.wang(a)rock-chips.com> Signed-off-by: Jianqun Xu <jay.xu(a)rock-chips.com> Link: https://lore.kernel.org/r/20210223100725.269240-1-jay.xu@rock-chips.com Signed-off-by: Linus Walleij <linus.walleij(a)linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/pinctrl/pinctrl-rockchip.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c index 4d3b62707524a..d0d5b8bdbc105 100644 --- a/drivers/pinctrl/pinctrl-rockchip.c +++ b/drivers/pinctrl/pinctrl-rockchip.c @@ -3353,12 +3353,15 @@ static int __maybe_unused rockchip_pinctrl_suspend(struct device *dev) static int __maybe_unused rockchip_pinctrl_resume(struct device *dev) { struct rockchip_pinctrl *info = dev_get_drvdata(dev); - int ret = regmap_write(info->regmap_base, RK3288_GRF_GPIO6C_IOMUX, - rk3288_grf_gpio6c_iomux | - GPIO6C6_SEL_WRITE_ENABLE); + int ret; - if (ret) - return ret; + if (info->ctrl->type == RK3288) { + ret = regmap_write(info->regmap_base, RK3288_GRF_GPIO6C_IOMUX, + rk3288_grf_gpio6c_iomux | + GPIO6C6_SEL_WRITE_ENABLE); + if (ret) + return ret; + } return pinctrl_force_default(info->pctl_dev); } -- 2.25.1

1 0

[PATCH kernel-4.19 38/57] reiserfs: update reiserfs_xattrs_initialized() condition
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Tetsuo Handa <penguin-kernel(a)i-love.sakura.ne.jp> commit 5e46d1b78a03d52306f21f77a4e4a144b6d31486 upstream. syzbot is reporting NULL pointer dereference at reiserfs_security_init() [1], for commit ab17c4f02156c4f7 ("reiserfs: fixup xattr_root caching") is assuming that REISERFS_SB(s)->xattr_root != NULL in reiserfs_xattr_jcreate_nblocks() despite that commit made REISERFS_SB(sb)->priv_root != NULL && REISERFS_SB(s)->xattr_root == NULL case possible. I guess that commit 6cb4aff0a77cc0e6 ("reiserfs: fix oops while creating privroot with selinux enabled") wanted to check xattr_root != NULL before reiserfs_xattr_jcreate_nblocks(), for the changelog is talking about the xattr root. The issue is that while creating the privroot during mount reiserfs_security_init calls reiserfs_xattr_jcreate_nblocks which dereferences the xattr root. The xattr root doesn't exist, so we get an oops. Therefore, update reiserfs_xattrs_initialized() to check both the privroot and the xattr root. Link: https://syzkaller.appspot.com/bug?id=8abaedbdeb32c861dc5340544284167dd0e46c… # [1] Reported-and-tested-by: syzbot <syzbot+690cb1e51970435f9775(a)syzkaller.appspotmail.com> Signed-off-by: Tetsuo Handa <penguin-kernel(a)I-love.SAKURA.ne.jp> Fixes: 6cb4aff0a77c ("reiserfs: fix oops while creating privroot with selinux enabled") Acked-by: Jeff Mahoney <jeffm(a)suse.com> Acked-by: Jan Kara <jack(a)suse.com> Signed-off-by: Linus Torvalds <torvalds(a)linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- fs/reiserfs/xattr.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/reiserfs/xattr.h b/fs/reiserfs/xattr.h index c764352447ba1..81bec2c80b25c 100644 --- a/fs/reiserfs/xattr.h +++ b/fs/reiserfs/xattr.h @@ -43,7 +43,7 @@ void reiserfs_security_free(struct reiserfs_security_handle *sec); static inline int reiserfs_xattrs_initialized(struct super_block *sb) { - return REISERFS_SB(sb)->priv_root != NULL; + return REISERFS_SB(sb)->priv_root && REISERFS_SB(sb)->xattr_root; } #define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header)) -- 2.25.1

1 0

[PATCH kernel-4.19 37/57] drm/amdgpu: check alignment on CPU page for bo map
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Xℹ Ruoyao <xry111(a)mengyan1223.wang> commit e3512fb67093fabdf27af303066627b921ee9bd8 upstream. The page table of AMDGPU requires an alignment to CPU page so we should check ioctl parameters for it. Return -EINVAL if some parameter is unaligned to CPU page, instead of corrupt the page table sliently. Reviewed-by: Christian König <christian.koenig(a)amd.com> Signed-off-by: Xi Ruoyao <xry111(a)mengyan1223.wang> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Cc: stable(a)vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index 50cb4c0a44709..6a1f5df4bc07e 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -2076,8 +2076,8 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev, uint64_t eaddr; /* validate the parameters */ - if (saddr & AMDGPU_GPU_PAGE_MASK || offset & AMDGPU_GPU_PAGE_MASK || - size == 0 || size & AMDGPU_GPU_PAGE_MASK) + if (saddr & ~PAGE_MASK || offset & ~PAGE_MASK || + size == 0 || size & ~PAGE_MASK) return -EINVAL; /* make sure object fit at this offset */ @@ -2141,8 +2141,8 @@ int amdgpu_vm_bo_replace_map(struct amdgpu_device *adev, int r; /* validate the parameters */ - if (saddr & AMDGPU_GPU_PAGE_MASK || offset & AMDGPU_GPU_PAGE_MASK || - size == 0 || size & AMDGPU_GPU_PAGE_MASK) + if (saddr & ~PAGE_MASK || offset & ~PAGE_MASK || + size == 0 || size & ~PAGE_MASK) return -EINVAL; /* make sure object fit at this offset */ -- 2.25.1

1 0

[PATCH kernel-4.19 36/57] drm/amdgpu: fix offset calculation in amdgpu_vm_bo_clear_mappings()
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Nirmoy Das <nirmoy.das(a)amd.com> commit 5e61b84f9d3ddfba73091f9fbc940caae1c9eb22 upstream. Offset calculation wasn't correct as start addresses are in pfn not in bytes. CC: stable(a)vger.kernel.org Signed-off-by: Nirmoy Das <nirmoy.das(a)amd.com> Reviewed-by: Christian König <christian.koenig(a)amd.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index f67c332b16a42..50cb4c0a44709 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -2286,7 +2286,7 @@ int amdgpu_vm_bo_clear_mappings(struct amdgpu_device *adev, after->start = eaddr + 1; after->last = tmp->last; after->offset = tmp->offset; - after->offset += after->start - tmp->start; + after->offset += (after->start - tmp->start) << PAGE_SHIFT; after->flags = tmp->flags; after->bo_va = tmp->bo_va; list_add(&after->list, &tmp->bo_va->invalids); -- 2.25.1

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[PATCH kernel-4.19 35/57] mm: fix race by making init_zero_pfn() early_initcall
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Ilya Lipnitskiy <ilya.lipnitskiy(a)gmail.com> commit e720e7d0e983bf05de80b231bccc39f1487f0f16 upstream. There are code paths that rely on zero_pfn to be fully initialized before core_initcall. For example, wq_sysfs_init() is a core_initcall function that eventually results in a call to kernel_execve, which causes a page fault with a subsequent mmput. If zero_pfn is not initialized by then it may not get cleaned up properly and result in an error: BUG: Bad rss-counter state mm:(ptrval) type:MM_ANONPAGES val:1 Here is an analysis of the race as seen on a MIPS device. On this particular MT7621 device (Ubiquiti ER-X), zero_pfn is PFN 0 until initialized, at which point it becomes PFN 5120: 1. wq_sysfs_init calls into kobject_uevent_env at core_initcall: kobject_uevent_env+0x7e4/0x7ec kset_register+0x68/0x88 bus_register+0xdc/0x34c subsys_virtual_register+0x34/0x78 wq_sysfs_init+0x1c/0x4c do_one_initcall+0x50/0x1a8 kernel_init_freeable+0x230/0x2c8 kernel_init+0x10/0x100 ret_from_kernel_thread+0x14/0x1c 2. kobject_uevent_env() calls call_usermodehelper_exec() which executes kernel_execve asynchronously. 3. Memory allocations in kernel_execve cause a page fault, bumping the MM reference counter: add_mm_counter_fast+0xb4/0xc0 handle_mm_fault+0x6e4/0xea0 __get_user_pages.part.78+0x190/0x37c __get_user_pages_remote+0x128/0x360 get_arg_page+0x34/0xa0 copy_string_kernel+0x194/0x2a4 kernel_execve+0x11c/0x298 call_usermodehelper_exec_async+0x114/0x194 4. In case zero_pfn has not been initialized yet, zap_pte_range does not decrement the MM_ANONPAGES RSS counter and the BUG message is triggered shortly afterwards when __mmdrop checks the ref counters: __mmdrop+0x98/0x1d0 free_bprm+0x44/0x118 kernel_execve+0x160/0x1d8 call_usermodehelper_exec_async+0x114/0x194 ret_from_kernel_thread+0x14/0x1c To avoid races such as described above, initialize init_zero_pfn at early_initcall level. Depending on the architecture, ZERO_PAGE is either constant or gets initialized even earlier, at paging_init, so there is no issue with initializing zero_pfn earlier. Link: https://lkml.kernel.org/r/CALCv0x2YqOXEAy2Q=hafjhHCtTHVodChv1qpM=niAXOpqEbt… Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy(a)gmail.com> Cc: Hugh Dickins <hughd(a)google.com> Cc: "Eric W. Biederman" <ebiederm(a)xmission.com> Cc: stable(a)vger.kernel.org Tested-by: 周琰杰 (Zhou Yanjie) <zhouyanjie(a)wanyeetech.com> Signed-off-by: Linus Torvalds <torvalds(a)linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- mm/memory.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/memory.c b/mm/memory.c index bbfe9b500d17c..f19c2aa517b17 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -150,7 +150,7 @@ static int __init init_zero_pfn(void) zero_pfn = page_to_pfn(ZERO_PAGE(0)); return 0; } -core_initcall(init_zero_pfn); +early_initcall(init_zero_pfn); #if defined(SPLIT_RSS_COUNTING) -- 2.25.1

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[PATCH kernel-4.19 34/57] tracing: Fix stack trace event size
by Yang Yingliang 15 Apr '21

15 Apr '21

From: "Steven Rostedt (VMware)" <rostedt(a)goodmis.org> commit 9deb193af69d3fd6dd8e47f292b67c805a787010 upstream. Commit cbc3b92ce037 fixed an issue to modify the macros of the stack trace event so that user space could parse it properly. Originally the stack trace format to user space showed that the called stack was a dynamic array. But it is not actually a dynamic array, in the way that other dynamic event arrays worked, and this broke user space parsing for it. The update was to make the array look to have 8 entries in it. Helper functions were added to make it parse it correctly, as the stack was dynamic, but was determined by the size of the event stored. Although this fixed user space on how it read the event, it changed the internal structure used for the stack trace event. It changed the array size from [0] to [8] (added 8 entries). This increased the size of the stack trace event by 8 words. The size reserved on the ring buffer was the size of the stack trace event plus the number of stack entries found in the stack trace. That commit caused the amount to be 8 more than what was needed because it did not expect the caller field to have any size. This produced 8 entries of garbage (and reading random data) from the stack trace event: <idle>-0 [002] d... 1976396.837549: <stack trace> => trace_event_raw_event_sched_switch => __traceiter_sched_switch => __schedule => schedule_idle => do_idle => cpu_startup_entry => secondary_startup_64_no_verify => 0xc8c5e150ffff93de => 0xffff93de => 0 => 0 => 0xc8c5e17800000000 => 0x1f30affff93de => 0x00000004 => 0x200000000 Instead, subtract the size of the caller field from the size of the event to make sure that only the amount needed to store the stack trace is reserved. Link: https://lore.kernel.org/lkml/your-ad-here.call-01617191565-ext-9692@work.ho… Cc: stable(a)vger.kernel.org Fixes: cbc3b92ce037 ("tracing: Set kernel_stack's caller size properly") Reported-by: Vasily Gorbik <gor(a)linux.ibm.com> Tested-by: Vasily Gorbik <gor(a)linux.ibm.com> Acked-by: Vasily Gorbik <gor(a)linux.ibm.com> Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- kernel/trace/trace.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 2780a98682078..032e62c42a5c2 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -2645,7 +2645,8 @@ static void __ftrace_trace_stack(struct ring_buffer *buffer, size *= sizeof(unsigned long); event = __trace_buffer_lock_reserve(buffer, TRACE_STACK, - sizeof(*entry) + size, flags, pc); + (sizeof(*entry) - sizeof(entry->caller)) + size, + flags, pc); if (!event) goto out; entry = ring_buffer_event_data(event); -- 2.25.1

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[PATCH kernel-4.19 33/57] PM: runtime: Fix ordering in pm_runtime_get_suppliers()
by Yang Yingliang 15 Apr '21

15 Apr '21

From: Adrian Hunter <adrian.hunter(a)intel.com> commit c0c33442f7203704aef345647e14c2fb86071001 upstream. rpm_active indicates how many times the supplier usage_count has been incremented. Consequently it must be updated after pm_runtime_get_sync() of the supplier, not before. Fixes: 4c06c4e6cf63 ("driver core: Fix possible supplier PM-usage counter imbalance") Signed-off-by: Adrian Hunter <adrian.hunter(a)intel.com> Cc: 5.1+ <stable(a)vger.kernel.org> # 5.1+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki(a)intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/base/power/runtime.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c index f1cac08fa8bb5..eaae4adf9ce4b 100644 --- a/drivers/base/power/runtime.c +++ b/drivers/base/power/runtime.c @@ -1572,8 +1572,8 @@ void pm_runtime_get_suppliers(struct device *dev) list_for_each_entry_rcu(link, &dev->links.suppliers, c_node) if (link->flags & DL_FLAG_PM_RUNTIME) { link->supplier_preactivated = true; - refcount_inc(&link->rpm_active); pm_runtime_get_sync(link->supplier); + refcount_inc(&link->rpm_active); } device_links_read_unlock(idx); -- 2.25.1

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