July 2023 - Kernel - mailweb.openeuler.org

[PATCH openEuler-23.09 0/8] arm64: Add framework to turn an IPI as NMI
by Ruan Jinjie 20 Jul '23

20 Jul '23

arm64: Add framework to turn an IPI as NMI Sumit Garg (7): arm64: Add framework to turn IPI as NMI irqchip/gic-v3: Enable support for SGIs to act as NMIs arm64: smp: Assign and setup an IPI as NMI nmi: backtrace: Allow runtime arch specific override arm64: ipi_nmi: Add support for NMI backtrace kgdb: Expose default CPUs roundup fallback mechanism arm64: kgdb: Roundup cpus using IPI as NMI Xiongfeng Wang (1): arm64: ipi_nmi: fix compile error when CONFIG_KGDB is disabled arch/arm/include/asm/irq.h | 2 +- arch/arm/kernel/smp.c | 3 +- arch/arm64/include/asm/irq.h | 6 +++ arch/arm64/include/asm/nmi.h | 17 +++++++ arch/arm64/kernel/Makefile | 2 +- arch/arm64/kernel/ipi_nmi.c | 85 ++++++++++++++++++++++++++++++++ arch/arm64/kernel/kgdb.c | 18 +++++++ arch/arm64/kernel/smp.c | 8 +++ arch/mips/include/asm/irq.h | 2 +- arch/mips/kernel/process.c | 3 +- arch/powerpc/include/asm/nmi.h | 2 +- arch/powerpc/kernel/stacktrace.c | 3 +- arch/sparc/include/asm/irq_64.h | 2 +- arch/sparc/kernel/process_64.c | 4 +- arch/x86/include/asm/irq.h | 2 +- arch/x86/kernel/apic/hw_nmi.c | 3 +- drivers/irqchip/irq-gic-v3.c | 29 ++++++++--- include/linux/kgdb.h | 12 +++++ include/linux/nmi.h | 12 ++--- kernel/debug/debug_core.c | 8 ++- 20 files changed, 195 insertions(+), 28 deletions(-) create mode 100644 arch/arm64/include/asm/nmi.h create mode 100644 arch/arm64/kernel/ipi_nmi.c -- 2.34.1

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[PATCH V2 openEuler-22.03-LTS 0/2] Fix alloc CDM node memory
by Zhang Zekun 20 Jul '23

20 Jul '23

Fix problem introduced by feature CDM node, which might alloc memory from other no cdm nodes. v2: -fix commit message warning Zhou Guanghui (2): mm: fix ignore cpuset enforcement mm: fix alloc CDM node memory for MPOL_BIND mm/page_alloc.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) -- 2.17.1

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[PATCH 0/3] openEuler kernel checkpatch test
by Jialin Zhang 20 Jul '23

20 Jul '23

This PR is only for openEuler kernel checkpatch test Inki Dae (1): drm/exynos: vidi: fix a wrong error return Min Li (2): drm/radeon: fix race condition UAF in radeon_gem_set_domain_ioctl drm/exynos: fix race condition UAF in exynos_g2d_exec_ioctl drivers/gpu/drm/exynos/exynos_drm_g2d.c | 2 +- drivers/gpu/drm/exynos/exynos_drm_vidi.c | 2 -- drivers/gpu/drm/radeon/radeon_gem.c | 4 +--- 3 files changed, 2 insertions(+), 6 deletions(-) -- 2.25.1

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[PATCH openEuler-1.0-LTS] media: dvb-core: Fix use-after-free due on race condition at dvb_net
by Cai Xinchen 20 Jul '23

20 Jul '23

From: Hyunwoo Kim <imv4bel(a)gmail.com> stable inclusion from stable-v4.19.285 commit 7bb9c6e05efcecb15b0354d574efbc36ca321d75 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I635JD CVE: CVE-2022-45886 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 4172385b0c9ac366dcab78eda48c26814b87ed1a ] A race condition may occur between the .disconnect function, which is called when the device is disconnected, and the dvb_device_open() function, which is called when the device node is open()ed. This results in several types of UAFs. The root cause of this is that you use the dvb_device_open() function, which does not implement a conditional statement that checks 'dvbnet->exit'. So, add 'remove_mutex` to protect 'dvbnet->exit' and use locked_dvb_net_open() function to check 'dvbnet->exit'. [mchehab: fix a checkpatch warning] Link: https://lore.kernel.org/linux-media/20221117045925.14297-3-imv4bel@gmail.com Signed-off-by: Hyunwoo Kim <imv4bel(a)gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Cai Xinchen <caixinchen1(a)huawei.com> --- drivers/media/dvb-core/dvb_net.c | 38 +++++++++++++++++++++++++++++--- include/media/dvb_net.h | 4 ++++ 2 files changed, 39 insertions(+), 3 deletions(-) diff --git a/drivers/media/dvb-core/dvb_net.c b/drivers/media/dvb-core/dvb_net.c index 10f78109bb3f..d8bdca2bf566 100644 --- a/drivers/media/dvb-core/dvb_net.c +++ b/drivers/media/dvb-core/dvb_net.c @@ -1562,15 +1562,43 @@ static long dvb_net_ioctl(struct file *file, return dvb_usercopy(file, cmd, arg, dvb_net_do_ioctl); } +static int locked_dvb_net_open(struct inode *inode, struct file *file) +{ + struct dvb_device *dvbdev = file->private_data; + struct dvb_net *dvbnet = dvbdev->priv; + int ret; + + if (mutex_lock_interruptible(&dvbnet->remove_mutex)) + return -ERESTARTSYS; + + if (dvbnet->exit) { + mutex_unlock(&dvbnet->remove_mutex); + return -ENODEV; + } + + ret = dvb_generic_open(inode, file); + + mutex_unlock(&dvbnet->remove_mutex); + + return ret; +} + static int dvb_net_close(struct inode *inode, struct file *file) { struct dvb_device *dvbdev = file->private_data; struct dvb_net *dvbnet = dvbdev->priv; + mutex_lock(&dvbnet->remove_mutex); + dvb_generic_release(inode, file); - if(dvbdev->users == 1 && dvbnet->exit == 1) + if (dvbdev->users == 1 && dvbnet->exit == 1) { + mutex_unlock(&dvbnet->remove_mutex); wake_up(&dvbdev->wait_queue); + } else { + mutex_unlock(&dvbnet->remove_mutex); + } + return 0; } @@ -1578,7 +1606,7 @@ static int dvb_net_close(struct inode *inode, struct file *file) static const struct file_operations dvb_net_fops = { .owner = THIS_MODULE, .unlocked_ioctl = dvb_net_ioctl, - .open = dvb_generic_open, + .open = locked_dvb_net_open, .release = dvb_net_close, .llseek = noop_llseek, }; @@ -1597,10 +1625,13 @@ void dvb_net_release (struct dvb_net *dvbnet) { int i; + mutex_lock(&dvbnet->remove_mutex); dvbnet->exit = 1; + mutex_unlock(&dvbnet->remove_mutex); + if (dvbnet->dvbdev->users < 1) wait_event(dvbnet->dvbdev->wait_queue, - dvbnet->dvbdev->users==1); + dvbnet->dvbdev->users == 1); dvb_unregister_device(dvbnet->dvbdev); @@ -1619,6 +1650,7 @@ int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet, int i; mutex_init(&dvbnet->ioctl_mutex); + mutex_init(&dvbnet->remove_mutex); dvbnet->demux = dmx; for (i=0; i<DVB_NET_DEVICES_MAX; i++) diff --git a/include/media/dvb_net.h b/include/media/dvb_net.h index 5e31d37f25fa..cc01dffcc9f3 100644 --- a/include/media/dvb_net.h +++ b/include/media/dvb_net.h @@ -41,6 +41,9 @@ * @exit: flag to indicate when the device is being removed. * @demux: pointer to &struct dmx_demux. * @ioctl_mutex: protect access to this struct. + * @remove_mutex: mutex that avoids a race condition between a callback + * called when the hardware is disconnected and the + * file_operations of dvb_net. * * Currently, the core supports up to %DVB_NET_DEVICES_MAX (10) network * devices. @@ -53,6 +56,7 @@ struct dvb_net { unsigned int exit:1; struct dmx_demux *demux; struct mutex ioctl_mutex; + struct mutex remove_mutex; }; /** -- 2.17.1

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[openEuler-22.03-LTS 1/2] mm: fix ignore cpuset enforcement
by Zhang Zekun 20 Jul '23

20 Jul '23

From: Zhou Guanghui <zhouguanghui1(a)huawei.com> ascend inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I612UG CVE: NA ----------------------------------------------------- Since the current condition ignores the cpuset enforcement by adding __GFP_THISNODEi to the gfp_mask, this will result in allocations that specify __GFP_THISNODE and non-cdm nodes not subject to cpuset restrictions. For example, procA pid 1000: node 0 cpus: 0 1 2 3 node 0 free: 57199MB node 1 cpus: 4 5 6 7 node 1 free: 55930MB cpuset/test/cpuset.mems 1 cpuset/test/tasks 1000 cpuset/test/cpuset.cpus 0-3 No cdm node exists. When procA malloc 100MB memory, the result is: node 0 cpus: 0 1 2 3 node 0 free: 57099MB node 1 cpus: 4 5 6 7 node 1 free: 55930MB This is not what we expected, and in fact 100 MB of memory should be allocated from node1. The reason for this problem is that THP specifies __GFP_THISNODE to attempt to allocate from the local node. Therefore, the cpuset enforcement should be ignored only when explicitly allocating memory from the cdm node using __GFP_ THISNODE. Signed-off-by: Zhou Guanghui <zhouguanghui1(a)huawei.com> --- mm/page_alloc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index df3723c0a819..d090465de32b 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4946,7 +4946,8 @@ static inline bool prepare_alloc_pages(gfp_t gfp_mask, unsigned int order, ac->migratetype = gfp_migratetype(gfp_mask); #ifdef CONFIG_COHERENT_DEVICE - if (cpusets_enabled() && !(*alloc_gfp & __GFP_THISNODE)) { + if (cpusets_enabled() && + (!(*alloc_gfp & __GFP_THISNODE) || !is_cdm_node(preferred_nid))) { #else if (cpusets_enabled()) { #endif -- 2.17.1

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[PATCH OLK-5.10 0/2] ksmbd: fix two ksmbd cve issue
by Long Li 20 Jul '23

20 Jul '23

Chih-Yen Chang (1): ksmbd: fix global-out-of-bounds in smb2_find_context_vals Namjae Jeon (1): ksmbd: validate command payload size fs/ksmbd/oplock.c | 5 +++-- fs/ksmbd/oplock.h | 2 +- fs/ksmbd/smb2misc.c | 23 ++++++++++++----------- fs/ksmbd/smb2pdu.c | 14 +++++++------- 4 files changed, 23 insertions(+), 21 deletions(-) -- 2.31.1

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[openEuler-22.03-LTS 1/2] mm: fix ignore cpuset enforcement
by Zhang Zekun 20 Jul '23

20 Jul '23

From: Zhou Guanghui <zhouguanghui1(a)huawei.com> ascend inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I612UG CVE: NA ----------------------------------------------------- Since the current condition ignores the cpuset enforcement by adding __GFP_THISNODEi to the gfp_mask, this will result in allocations that specify __GFP_THISNODE and non-cdm nodes not subject to cpuset restrictions. For example, procA pid 1000: node 0 cpus: 0 1 2 3 node 0 free: 57199MB node 1 cpus: 4 5 6 7 node 1 free: 55930MB cpuset/test/cpuset.mems 1 cpuset/test/tasks 1000 cpuset/test/cpuset.cpus 0-3 No cdm node exists. When procA malloc 100MB memory, the result is: node 0 cpus: 0 1 2 3 node 0 free: 57099MB node 1 cpus: 4 5 6 7 node 1 free: 55930MB This is not what we expected, and in fact 100 MB of memory should be allocated from node1. The reason for this problem is that THP specifies __GFP_THISNODE to attempt to allocate from the local node. Therefore, the cpuset enforcement should be ignored only when explicitly allocating memory from the cdm node using __GFP_ THISNODE. Signed-off-by: Zhou Guanghui <zhouguanghui1(a)huawei.com> --- mm/page_alloc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index df3723c0a819..d090465de32b 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4946,7 +4946,8 @@ static inline bool prepare_alloc_pages(gfp_t gfp_mask, unsigned int order, ac->migratetype = gfp_migratetype(gfp_mask); #ifdef CONFIG_COHERENT_DEVICE - if (cpusets_enabled() && !(*alloc_gfp & __GFP_THISNODE)) { + if (cpusets_enabled() && + (!(*alloc_gfp & __GFP_THISNODE) || !is_cdm_node(preferred_nid))) { #else if (cpusets_enabled()) { #endif -- 2.17.1

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[PATCH openEuler-22.03-LTS-SP2] dm stats: check for and propagate alloc_percpu failure
by Li Lingfeng 20 Jul '23

20 Jul '23

From: Jiasheng Jiang <jiasheng(a)iscas.ac.cn> mainline inclusion from mainline-v6.3-rc4 commit d3aa3e060c4a80827eb801fc448debc9daa7c46b category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I7I2L8 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- Check alloc_precpu()'s return value and return an error from dm_stats_init() if it fails. Update alloc_dev() to fail if dm_stats_init() does. Otherwise, a NULL pointer dereference will occur in dm_stats_cleanup() even if dm-stats isn't being actively used. Fixes: fd2ed4d25270 ("dm: add statistics support") Cc: stable(a)vger.kernel.org Signed-off-by: Jiasheng Jiang <jiasheng(a)iscas.ac.cn> Signed-off-by: Mike Snitzer <snitzer(a)kernel.org> Conflicts: drivers/md/dm-stats.c drivers/md/dm.c Signed-off-by: Li Lingfeng <lilingfeng3(a)huawei.com> --- drivers/md/dm-stats.c | 7 ++++++- drivers/md/dm-stats.h | 2 +- drivers/md/dm.c | 4 +++- 3 files changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/md/dm-stats.c b/drivers/md/dm-stats.c index 55443a6598fa..4029281ca383 100644 --- a/drivers/md/dm-stats.c +++ b/drivers/md/dm-stats.c @@ -188,7 +188,7 @@ static int dm_stat_in_flight(struct dm_stat_shared *shared) atomic_read(&shared->in_flight[WRITE]); } -void dm_stats_init(struct dm_stats *stats) +int dm_stats_init(struct dm_stats *stats) { int cpu; struct dm_stats_last_position *last; @@ -196,11 +196,16 @@ void dm_stats_init(struct dm_stats *stats) mutex_init(&stats->mutex); INIT_LIST_HEAD(&stats->list); stats->last = alloc_percpu(struct dm_stats_last_position); + if (!stats->last) + return -ENOMEM; + for_each_possible_cpu(cpu) { last = per_cpu_ptr(stats->last, cpu); last->last_sector = (sector_t)ULLONG_MAX; last->last_rw = UINT_MAX; } + + return 0; } void dm_stats_cleanup(struct dm_stats *stats) diff --git a/drivers/md/dm-stats.h b/drivers/md/dm-stats.h index 2ddfae678f32..dcac11fce03b 100644 --- a/drivers/md/dm-stats.h +++ b/drivers/md/dm-stats.h @@ -22,7 +22,7 @@ struct dm_stats_aux { unsigned long long duration_ns; }; -void dm_stats_init(struct dm_stats *st); +int dm_stats_init(struct dm_stats *st); void dm_stats_cleanup(struct dm_stats *st); struct mapped_device; diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 1cb2a84f2403..0c9ce43f3b53 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1904,7 +1904,9 @@ static struct mapped_device *alloc_dev(int minor) if (!md->bdev) goto bad; - dm_stats_init(&md->stats); + r = dm_stats_init(&md->stats); + if (r < 0) + goto bad; /* Populate the mapping, nobody knows we exist yet */ spin_lock(&_minor_lock); -- 2.31.1

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[PATCH OLK-5.10 0/3] CVE-2023-3567 fix patches
by Lu Jialin 20 Jul '23

20 Jul '23

First is the patch to fix CVE-2023-3567. The latter two patches are the bugfix patches for the first patch. George Kennedy (2): vc_screen: move load of struct vc_data pointer in vcs_read() to avoid UAF vc_screen: modify vcs_size() handling in vcs_read() Thomas Weißschuh (1): vc_screen: don't clobber return value in vcs_read drivers/tty/vt/vc_screen.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) -- 2.17.1

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[PATCH OLK-5.10] ksmbd: fix out-of-bound read in deassemble_neg_contexts()
by Li Lingfeng 20 Jul '23

20 Jul '23

From: Namjae Jeon <linkinjeon(a)kernel.org> mainline inclusion from mainline-v6.4-rc6 commit f1a411873c85b642f13b01f21b534c2bab81fc1b category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I7LU2Q CVE: CVE-2023-38427 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/f… -------------------------------- The check in the beginning is `clen + sizeof(struct smb2_neg_context) <= len_of_ctxts`, but in the end of loop, `len_of_ctxts` will subtract `((clen + 7) & ~0x7) + sizeof(struct smb2_neg_context)`, which causes integer underflow when clen does the 8 alignment. We should use `(clen + 7) & ~0x7` in the check to avoid underflow from happening. Then there are some variables that need to be declared unsigned instead of signed. [ 11.671070] BUG: KASAN: slab-out-of-bounds in smb2_handle_negotiate+0x799/0x1610 [ 11.671533] Read of size 2 at addr ffff888005e86cf2 by task kworker/0:0/7 ... [ 11.673383] Call Trace: [ 11.673541] <TASK> [ 11.673679] dump_stack_lvl+0x33/0x50 [ 11.673913] print_report+0xcc/0x620 [ 11.674671] kasan_report+0xae/0xe0 [ 11.675171] kasan_check_range+0x35/0x1b0 [ 11.675412] smb2_handle_negotiate+0x799/0x1610 [ 11.676217] ksmbd_smb_negotiate_common+0x526/0x770 [ 11.676795] handle_ksmbd_work+0x274/0x810 ... Cc: stable(a)vger.kernel.org Signed-off-by: Chih-Yen Chang <cc85nod(a)gmail.com> Tested-by: Chih-Yen Chang <cc85nod(a)gmail.com> Signed-off-by: Namjae Jeon <linkinjeon(a)kernel.org> Signed-off-by: Steve French <stfrench(a)microsoft.com> Conflict: fs/smb/server/smb2pdu.c Signed-off-by: Li Lingfeng <lilingfeng3(a)huawei.com> --- fs/ksmbd/smb2pdu.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index 18e176fcddf0..9add135cb5da 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -978,13 +978,13 @@ static void decode_sign_cap_ctxt(struct ksmbd_conn *conn, static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn, struct smb2_negotiate_req *req, - int len_of_smb) + unsigned int len_of_smb) { /* +4 is to account for the RFC1001 len field */ struct smb2_neg_context *pctx = (struct smb2_neg_context *)req; int i = 0, len_of_ctxts; - int offset = le32_to_cpu(req->NegotiateContextOffset); - int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount); + unsigned int offset = le32_to_cpu(req->NegotiateContextOffset); + unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount); __le32 status = STATUS_INVALID_PARAMETER; ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt); @@ -1002,7 +1002,7 @@ static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn, if (len_of_ctxts == 0) break; - if (len_of_ctxts < sizeof(struct smb2_neg_context)) + if (len_of_ctxts < (int)sizeof(struct smb2_neg_context)) break; pctx = (struct smb2_neg_context *)((char *)pctx + offset); @@ -1053,9 +1053,8 @@ static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn, } /* offsets must be 8 byte aligned */ - clen = (clen + 7) & ~0x7; - offset = clen + sizeof(struct smb2_neg_context); - len_of_ctxts -= clen + sizeof(struct smb2_neg_context); + offset = (clen + sizeof(struct smb2_neg_context + 7) & ~0x7; + len_of_ctxts -= offset; } return status; } -- 2.31.1

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