March 2024 - Kernel - mailweb.openeuler.org

[PATCH OLK-5.10 0/1] CVE-2023-52593 wifi
by Chen Ridong 19 Mar '24

19 Mar '24

*** BLURB HERE *** Chen Ridong (1): wifi: wfx: fix possible NULL pointer dereference in wfx_set_mfp_ap() drivers/staging/wfx/sta.c | 42 ++++++++++++++++++++++----------------- 1 file changed, 24 insertions(+), 18 deletions(-) -- 2.34.1

2 2

[PATCH V4 OLK-6.6] iommu/iova: avoid softlockup in fq_flush_timeout
by Zhang Zekun 19 Mar '24

19 Mar '24

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8ZE0I CVE: NA -------------------------------- There is a softlockup undering cpu pressure test. ... pc : _raw_spin_unlock_irqrestore+0x14/0x78 lr : fq_flush_timeout+0x94/0x118 ... Call trace: _raw_spin_unlock_irqrestore+0x14/0x78 call_timer_fn+0x3c/0x1d0 expire_timers+0xcc/0x190 run_timer_softirq+0xfc/0x268 __do_softirq+0x128/0x3dc ____do_softirq+0x18/0x30 call_on_irq_stack+0x24/0x30 do_softirq_own_stack+0x24/0x38 irq_exit_rcu+0xc0/0xe8 el1_interrupt+0x48/0xc0 el1h_64_irq_handler+0x18/0x28 el1h_64_irq+0x78/0x80 __schedule+0xf28/0x12a0 schedule+0x3c/0x108 schedule_timeout+0xa0/0x1d0 pktgen_thread_worker+0x1180/0x15d0 kthread+0x120/0x130 ret_from_fork+0x10/0x20 This is because the timer callback fq_flush_timeout may run more than 10ms, and timer may be processed continuously in the softirq so trigger softlockup. We can use work to deal with fq_ring_free for each cpu which may take long time, that to avoid triggering softlockup. Signed-off-by: Li Bin <huawei.libin(a)huawei.com> Signed-off-by: Zhang Zekun <zhangzekun11(a)huawei.com> --- v4: - fix code check warnings. drivers/iommu/dma-iommu.c | 27 ++++++++++++++++++++------- 1 file changed, 20 insertions(+), 7 deletions(-) diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 037fcf826407..06ccdda6173b 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -85,6 +85,8 @@ struct iommu_dma_cookie { /* Options for dma-iommu use */ struct iommu_dma_options options; struct mutex mutex; + + struct work_struct free_iova_work; }; static DEFINE_STATIC_KEY_FALSE(iommu_deferred_attach_enabled); @@ -184,17 +186,11 @@ static void fq_flush_iotlb(struct iommu_dma_cookie *cookie) static void fq_flush_timeout(struct timer_list *t) { struct iommu_dma_cookie *cookie = from_timer(cookie, t, fq_timer); - int cpu; atomic_set(&cookie->fq_timer_on, 0); fq_flush_iotlb(cookie); - if (cookie->options.qt == IOMMU_DMA_OPTS_SINGLE_QUEUE) { - fq_ring_free(cookie, cookie->single_fq); - } else { - for_each_possible_cpu(cpu) - fq_ring_free(cookie, per_cpu_ptr(cookie->percpu_fq, cpu)); - } + schedule_work(&cookie->free_iova_work); } static void queue_iova(struct iommu_dma_cookie *cookie, @@ -279,6 +275,7 @@ static void iommu_dma_free_fq(struct iommu_dma_cookie *cookie) return; del_timer_sync(&cookie->fq_timer); + flush_work(&cookie->free_iova_work); if (cookie->options.qt == IOMMU_DMA_OPTS_SINGLE_QUEUE) iommu_dma_free_fq_single(cookie->single_fq); else @@ -330,6 +327,21 @@ static int iommu_dma_init_fq_percpu(struct iommu_dma_cookie *cookie) return 0; } +static void free_iova_work_func(struct work_struct *work) +{ + struct iommu_dma_cookie *cookie; + int cpu; + + cookie = container_of(work, struct iommu_dma_cookie, free_iova_work); + if (cookie->options.qt == IOMMU_DMA_OPTS_SINGLE_QUEUE) { + fq_ring_free(cookie, cookie->single_fq); + } else { + for_each_possible_cpu(cpu) + fq_ring_free(cookie, per_cpu_ptr(cookie->percpu_fq, cpu)); + } + +} + /* sysfs updates are serialised by the mutex of the group owning @domain */ int iommu_dma_init_fq(struct iommu_domain *domain) { @@ -352,6 +364,7 @@ int iommu_dma_init_fq(struct iommu_domain *domain) return -ENOMEM; } + INIT_WORK(&cookie->free_iova_work, free_iova_work_func); timer_setup(&cookie->fq_timer, fq_flush_timeout, 0); atomic_set(&cookie->fq_timer_on, 0); /* -- 2.17.1

2 1

[PATCH OLK-6.6] iommu/arm-smmu-v3: Disable ECMDQ before reset
by Wang Wensheng 19 Mar '24

19 Mar '24

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I97CSY -------------------------------- In kdump kernel, the ECMDQ is enabled before and cannot be reset before it is disabled. This leads to "CMD_SYNC timeout" problem. Disable the ECMDQ before reset the ECMDQ to fix. Signed-off-by: Wang Wensheng <wangwensheng4(a)huawei.com> --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index 3d3e0c935023..4b006590ae05 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -3869,6 +3869,20 @@ static int arm_smmu_ecmdq_reset(struct arm_smmu_device *smmu) q->llq.prod = 0; q->llq.cons = 0; } + + reg = readl(q->prod_reg); + if (reg & ECMDQ_PROD_EN) { + /* disable ecmdq */ + writel(reg & ~ECMDQ_PROD_EN, q->prod_reg); + ret = readl_relaxed_poll_timeout(q->cons_reg, reg, + !(reg & ECMDQ_CONS_ENACK), 1, ARM_SMMU_POLL_TIMEOUT_US); + if (ret) { + dev_warn(smmu->dev, "ecmdq[%d] disable failed\n", i); + smmu->ecmdq_enabled = 0; + return ret; + } + } + writeq_relaxed(q->q_base, ecmdq->base + ARM_SMMU_ECMDQ_BASE); writel_relaxed(q->llq.prod, ecmdq->base + ARM_SMMU_ECMDQ_PROD); writel_relaxed(q->llq.cons, ecmdq->base + ARM_SMMU_ECMDQ_CONS); -- 2.17.1

1 0

[PATCH OLK-5.10 0/1] CVE-2023-52593
by Chen Ridong 19 Mar '24

19 Mar '24

*** BLURB HERE *** Chen Ridong (1): wifi: wfx: fix possible NULL pointer dereference in wfx_set_mfp_ap() drivers/staging/wfx/sta.c | 42 ++++++++++++++++++++++----------------- 1 file changed, 24 insertions(+), 18 deletions(-) -- 2.34.1

2 2

[PATCH openEuler-1.0-LTS 0/3] CVE-2021-47114
by Yifan Qiao 19 Mar '24

19 Mar '24

Junxiao Bi (3): ocfs2: fix data corruption by fallocate ocfs2: fix zero out valid data ocfs2: issue zeroout to EOF blocks fs/ocfs2/file.c | 74 ++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 70 insertions(+), 4 deletions(-) -- 2.39.2

2 4

[PATCH openEuler-1.0-LTS 0/3]
by Yifan Qiao 19 Mar '24

19 Mar '24

Junxiao Bi (3): ocfs2: fix data corruption by fallocate ocfs2: fix zero out valid data ocfs2: issue zeroout to EOF blocks fs/ocfs2/file.c | 74 ++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 70 insertions(+), 4 deletions(-) -- 2.39.2

2 8

[PATCH openEuler-22.03-LTS-SP2] UBSAN: array-index-out-of-bounds in dtSplitRoot
by ZhaoLong Wang 19 Mar '24

19 Mar '24

From: Osama Muhammad <osmtendev(a)gmail.com> stable inclusion from stable-v5.10.210 commit 7aa33854477d9c346f5560a1a1fcb3fe7783e2a8 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I96G93 CVE: CVE-2023-52603 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 27e56f59bab5ddafbcfe69ad7a4a6ea1279c1b16 ] Syzkaller reported the following issue: oop0: detected capacity change from 0 to 32768 UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:1971:9 index -2 is out of range for type 'struct dtslot [128]' CPU: 0 PID: 3613 Comm: syz-executor270 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 ubsan_epilogue lib/ubsan.c:151 [inline] __ubsan_handle_out_of_bounds+0xdb/0x130 lib/ubsan.c:283 dtSplitRoot+0x8d8/0x1900 fs/jfs/jfs_dtree.c:1971 dtSplitUp fs/jfs/jfs_dtree.c:985 [inline] dtInsert+0x1189/0x6b80 fs/jfs/jfs_dtree.c:863 jfs_mkdir+0x757/0xb00 fs/jfs/namei.c:270 vfs_mkdir+0x3b3/0x590 fs/namei.c:4013 do_mkdirat+0x279/0x550 fs/namei.c:4038 __do_sys_mkdirat fs/namei.c:4053 [inline] __se_sys_mkdirat fs/namei.c:4051 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4051 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fcdc0113fd9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffeb8bc67d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcdc0113fd9 RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000003 RBP: 00007fcdc00d37a0 R08: 0000000000000000 R09: 00007fcdc00d37a0 R10: 00005555559a72c0 R11: 0000000000000246 R12: 00000000f8008000 R13: 0000000000000000 R14: 00083878000000f8 R15: 0000000000000000 </TASK> The issue is caused when the value of fsi becomes less than -1. The check to break the loop when fsi value becomes -1 is present but syzbot was able to produce value less than -1 which cause the error. This patch simply add the change for the values less than 0. The patch is tested via syzbot. Reported-and-tested-by: syzbot+d4b1df2e9d4ded6488ec(a)syzkaller.appspotmail.com Link: https://syzkaller.appspot.com/bug?extid=d4b1df2e9d4ded6488ec Signed-off-by: Osama Muhammad <osmtendev(a)gmail.com> Signed-off-by: Dave Kleikamp <dave.kleikamp(a)oracle.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: ZhaoLong Wang <wangzhaolong1(a)huawei.com> --- fs/jfs/jfs_dtree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/jfs/jfs_dtree.c b/fs/jfs/jfs_dtree.c index 837d42f61464..fafcb90219cf 100644 --- a/fs/jfs/jfs_dtree.c +++ b/fs/jfs/jfs_dtree.c @@ -1970,7 +1970,7 @@ static int dtSplitRoot(tid_t tid, do { f = &rp->slot[fsi]; fsi = f->next; - } while (fsi != -1); + } while (fsi >= 0); f->next = n; } -- 2.39.2

2 1

[PATCH openEuler-22.03-LTS-SP1] UBSAN: array-index-out-of-bounds in dtSplitRoot
by ZhaoLong Wang 19 Mar '24

19 Mar '24

From: Osama Muhammad <osmtendev(a)gmail.com> stable inclusion from stable-v5.10.210 commit 7aa33854477d9c346f5560a1a1fcb3fe7783e2a8 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I96G93 CVE: CVE-2023-52603 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 27e56f59bab5ddafbcfe69ad7a4a6ea1279c1b16 ] Syzkaller reported the following issue: oop0: detected capacity change from 0 to 32768 UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:1971:9 index -2 is out of range for type 'struct dtslot [128]' CPU: 0 PID: 3613 Comm: syz-executor270 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 ubsan_epilogue lib/ubsan.c:151 [inline] __ubsan_handle_out_of_bounds+0xdb/0x130 lib/ubsan.c:283 dtSplitRoot+0x8d8/0x1900 fs/jfs/jfs_dtree.c:1971 dtSplitUp fs/jfs/jfs_dtree.c:985 [inline] dtInsert+0x1189/0x6b80 fs/jfs/jfs_dtree.c:863 jfs_mkdir+0x757/0xb00 fs/jfs/namei.c:270 vfs_mkdir+0x3b3/0x590 fs/namei.c:4013 do_mkdirat+0x279/0x550 fs/namei.c:4038 __do_sys_mkdirat fs/namei.c:4053 [inline] __se_sys_mkdirat fs/namei.c:4051 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4051 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fcdc0113fd9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffeb8bc67d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcdc0113fd9 RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000003 RBP: 00007fcdc00d37a0 R08: 0000000000000000 R09: 00007fcdc00d37a0 R10: 00005555559a72c0 R11: 0000000000000246 R12: 00000000f8008000 R13: 0000000000000000 R14: 00083878000000f8 R15: 0000000000000000 </TASK> The issue is caused when the value of fsi becomes less than -1. The check to break the loop when fsi value becomes -1 is present but syzbot was able to produce value less than -1 which cause the error. This patch simply add the change for the values less than 0. The patch is tested via syzbot. Reported-and-tested-by: syzbot+d4b1df2e9d4ded6488ec(a)syzkaller.appspotmail.com Link: https://syzkaller.appspot.com/bug?extid=d4b1df2e9d4ded6488ec Signed-off-by: Osama Muhammad <osmtendev(a)gmail.com> Signed-off-by: Dave Kleikamp <dave.kleikamp(a)oracle.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: ZhaoLong Wang <wangzhaolong1(a)huawei.com> --- fs/jfs/jfs_dtree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/jfs/jfs_dtree.c b/fs/jfs/jfs_dtree.c index 837d42f61464..fafcb90219cf 100644 --- a/fs/jfs/jfs_dtree.c +++ b/fs/jfs/jfs_dtree.c @@ -1970,7 +1970,7 @@ static int dtSplitRoot(tid_t tid, do { f = &rp->slot[fsi]; fsi = f->next; - } while (fsi != -1); + } while (fsi >= 0); f->next = n; } -- 2.39.2

2 1

[PATCH openEuler-22.03-LTS] UBSAN: array-index-out-of-bounds in dtSplitRoot
by ZhaoLong Wang 19 Mar '24

19 Mar '24

From: Osama Muhammad <osmtendev(a)gmail.com> stable inclusion from stable-v5.10.210 commit 7aa33854477d9c346f5560a1a1fcb3fe7783e2a8 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I96G93 CVE: CVE-2023-52603 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 27e56f59bab5ddafbcfe69ad7a4a6ea1279c1b16 ] Syzkaller reported the following issue: oop0: detected capacity change from 0 to 32768 UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:1971:9 index -2 is out of range for type 'struct dtslot [128]' CPU: 0 PID: 3613 Comm: syz-executor270 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 ubsan_epilogue lib/ubsan.c:151 [inline] __ubsan_handle_out_of_bounds+0xdb/0x130 lib/ubsan.c:283 dtSplitRoot+0x8d8/0x1900 fs/jfs/jfs_dtree.c:1971 dtSplitUp fs/jfs/jfs_dtree.c:985 [inline] dtInsert+0x1189/0x6b80 fs/jfs/jfs_dtree.c:863 jfs_mkdir+0x757/0xb00 fs/jfs/namei.c:270 vfs_mkdir+0x3b3/0x590 fs/namei.c:4013 do_mkdirat+0x279/0x550 fs/namei.c:4038 __do_sys_mkdirat fs/namei.c:4053 [inline] __se_sys_mkdirat fs/namei.c:4051 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4051 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fcdc0113fd9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffeb8bc67d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcdc0113fd9 RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000003 RBP: 00007fcdc00d37a0 R08: 0000000000000000 R09: 00007fcdc00d37a0 R10: 00005555559a72c0 R11: 0000000000000246 R12: 00000000f8008000 R13: 0000000000000000 R14: 00083878000000f8 R15: 0000000000000000 </TASK> The issue is caused when the value of fsi becomes less than -1. The check to break the loop when fsi value becomes -1 is present but syzbot was able to produce value less than -1 which cause the error. This patch simply add the change for the values less than 0. The patch is tested via syzbot. Reported-and-tested-by: syzbot+d4b1df2e9d4ded6488ec(a)syzkaller.appspotmail.com Link: https://syzkaller.appspot.com/bug?extid=d4b1df2e9d4ded6488ec Signed-off-by: Osama Muhammad <osmtendev(a)gmail.com> Signed-off-by: Dave Kleikamp <dave.kleikamp(a)oracle.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: ZhaoLong Wang <wangzhaolong1(a)huawei.com> --- fs/jfs/jfs_dtree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/jfs/jfs_dtree.c b/fs/jfs/jfs_dtree.c index 837d42f61464..fafcb90219cf 100644 --- a/fs/jfs/jfs_dtree.c +++ b/fs/jfs/jfs_dtree.c @@ -1970,7 +1970,7 @@ static int dtSplitRoot(tid_t tid, do { f = &rp->slot[fsi]; fsi = f->next; - } while (fsi != -1); + } while (fsi >= 0); f->next = n; } -- 2.39.2

2 1

[PATCH OLK-5.10] UBSAN: array-index-out-of-bounds in dtSplitRoot
by ZhaoLong Wang 19 Mar '24

19 Mar '24

From: Osama Muhammad <osmtendev(a)gmail.com> stable inclusion from stable-v5.10.210 commit 7aa33854477d9c346f5560a1a1fcb3fe7783e2a8 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I96G93 CVE: CVE-2023-52603 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 27e56f59bab5ddafbcfe69ad7a4a6ea1279c1b16 ] Syzkaller reported the following issue: oop0: detected capacity change from 0 to 32768 UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:1971:9 index -2 is out of range for type 'struct dtslot [128]' CPU: 0 PID: 3613 Comm: syz-executor270 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 ubsan_epilogue lib/ubsan.c:151 [inline] __ubsan_handle_out_of_bounds+0xdb/0x130 lib/ubsan.c:283 dtSplitRoot+0x8d8/0x1900 fs/jfs/jfs_dtree.c:1971 dtSplitUp fs/jfs/jfs_dtree.c:985 [inline] dtInsert+0x1189/0x6b80 fs/jfs/jfs_dtree.c:863 jfs_mkdir+0x757/0xb00 fs/jfs/namei.c:270 vfs_mkdir+0x3b3/0x590 fs/namei.c:4013 do_mkdirat+0x279/0x550 fs/namei.c:4038 __do_sys_mkdirat fs/namei.c:4053 [inline] __se_sys_mkdirat fs/namei.c:4051 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4051 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fcdc0113fd9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffeb8bc67d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcdc0113fd9 RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000003 RBP: 00007fcdc00d37a0 R08: 0000000000000000 R09: 00007fcdc00d37a0 R10: 00005555559a72c0 R11: 0000000000000246 R12: 00000000f8008000 R13: 0000000000000000 R14: 00083878000000f8 R15: 0000000000000000 </TASK> The issue is caused when the value of fsi becomes less than -1. The check to break the loop when fsi value becomes -1 is present but syzbot was able to produce value less than -1 which cause the error. This patch simply add the change for the values less than 0. The patch is tested via syzbot. Reported-and-tested-by: syzbot+d4b1df2e9d4ded6488ec(a)syzkaller.appspotmail.com Link: https://syzkaller.appspot.com/bug?extid=d4b1df2e9d4ded6488ec Signed-off-by: Osama Muhammad <osmtendev(a)gmail.com> Signed-off-by: Dave Kleikamp <dave.kleikamp(a)oracle.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: ZhaoLong Wang <wangzhaolong1(a)huawei.com> --- fs/jfs/jfs_dtree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/jfs/jfs_dtree.c b/fs/jfs/jfs_dtree.c index 837d42f61464..fafcb90219cf 100644 --- a/fs/jfs/jfs_dtree.c +++ b/fs/jfs/jfs_dtree.c @@ -1970,7 +1970,7 @@ static int dtSplitRoot(tid_t tid, do { f = &rp->slot[fsi]; fsi = f->next; - } while (fsi != -1); + } while (fsi >= 0); f->next = n; } -- 2.39.2

2 1