Date | Name | Commit | Repro | Result |
---|---|---|---|---|
2023/07/16 | linux-5.15.y (ToT) | d54cfc420586 | C | [report] INFO: task hung in io_ring_exit_work |
2023/07/16 | upstream (ToT) | 831fe284d827 | C | Didn't crash |
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Date | Name | Commit | Repro | Result |
---|---|---|---|---|
2023/07/16 | linux-5.15.y (ToT) | d54cfc420586 | C | [report] INFO: task hung in io_ring_exit_work |
2023/07/16 | upstream (ToT) | 831fe284d827 | C | Didn't crash |
Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
upstream | INFO: task hung in io_ring_exit_work io-uring | C | unreliable | unreliable | 820 | 521d | 1341d | 0/28 | auto-obsoleted due to no activity on 2023/09/12 07:44 |
linux-6.1 | INFO: task hung in io_ring_exit_work | 8 | 523d | 614d | 0/3 | auto-obsoleted due to no activity on 2023/10/10 09:34 |
Created | Duration | User | Patch | Repo | Result |
---|---|---|---|---|---|
2024/10/09 23:10 | 1h03m | retest repro | linux-5.15.y | OK log |
INFO: task kworker/u4:7:4004 blocked for more than 143 seconds. Not tainted 5.15.120-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:7 state:D stack:25472 pid: 4004 ppid: 2 flags:0x00004000 Workqueue: events_unbound io_ring_exit_work Call Trace: <TASK> context_switch kernel/sched/core.c:5026 [inline] __schedule+0x12c4/0x4590 kernel/sched/core.c:6372 schedule+0x11b/0x1f0 kernel/sched/core.c:6455 schedule_timeout+0xac/0x300 kernel/time/timer.c:1860 do_wait_for_common+0x2d9/0x480 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x48/0x60 kernel/sched/completion.c:138 io_ring_exit_work+0x6a9/0x1330 io_uring/io_uring.c:9725 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2307 worker_thread+0xaca/0x1280 kernel/workqueue.c:2454 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 </TASK> Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8c91e6a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by kworker/u4:2/154: #0: ffff888011c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280 #1: ffffc90001a8fd20 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282 2 locks held by getty/3265: #0: ffff88814b25b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc90002bb32e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1da0 drivers/tty/n_tty.c:2147 2 locks held by kworker/u4:7/4004: #0: ffff888011c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280 #1: ffffc90004937d20 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282 2 locks held by kworker/u4:11/4358: #0: ffff888011c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280 #1: ffffc90005fb7d20 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282 1 lock held by syz-executor.5/13217: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.120-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xe72/0xeb0 kernel/hung_task.c:295 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 </TASK> Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2961 Comm: udevd Not tainted 5.15.120-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 RIP: 0010:hlock_class kernel/locking/lockdep.c:197 [inline] RIP: 0010:__lock_acquire+0xfb7/0x1ff0 kernel/locking/lockdep.c:5007 Code: 0e 00 00 8b 1b 81 e3 ff 1f 00 00 89 d8 c1 e8 06 48 8d 3c c5 00 21 bd 8f be 08 00 00 00 e8 c1 ec 66 00 48 0f a3 1d a9 9d 5a 0e <0f> 83 be 01 00 00 48 8d 04 5b 48 c1 e0 06 48 8d 98 00 80 8c 8f 48 RSP: 0018:ffffc90002b9f600 EFLAGS: 00000057 RAX: 0000000000000001 RBX: 0000000000000150 RCX: ffffffff8162834f RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8fbd2128 RBP: b12163e75ced83e9 R08: dffffc0000000000 R09: fffffbfff1f7a426 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001 R13: ffff88807df24668 R14: ffff88807df23b80 R15: ffff88807df246b8 FS: 00007f4e878d6c80(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555ab9938 CR3: 000000001d8ac000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <NMI> </NMI> <TASK> lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162 kasan_quarantine_reduce+0x64/0x180 mm/kasan/quarantine.c:257 __kasan_slab_alloc+0x2f/0xc0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x53/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233 getname_flags+0xb8/0x4e0 fs/namei.c:138 user_path_at_empty+0x2a/0x180 fs/namei.c:2852 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0x106/0x3b0 fs/stat.c:221 vfs_fstatat fs/stat.c:243 [inline] __do_sys_newfstatat fs/stat.c:411 [inline] __se_sys_newfstatat fs/stat.c:405 [inline] __x64_sys_newfstatat+0x12c/0x1b0 fs/stat.c:405 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+0x61/0xcb RIP: 0033:0x7f4e87a015f4 Code: 64 c7 00 09 00 00 00 83 c8 ff c3 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 00 00 00 00 41 89 ca b8 06 01 00 00 0f 05 <45> 31 c0 3d 00 f0 ff ff 76 10 48 8b 15 03 a8 0d 00 f7 d8 41 83 c8 RSP: 002b:00007ffeb37a0c28 EFLAGS: 00000246 ORIG_RAX: 0000000000000106 RAX: ffffffffffffffda RBX: 000055f2ef2936e0 RCX: 00007f4e87a015f4 RDX: 00007ffeb37a0c38 RSI: 000055f2ef283897 RDI: 00000000ffffff9c RBP: 000055f2f071ec28 R08: 0005f9c4183b50c0 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 0005f9c4183b50c0 R15: 000055f2ef287dca </TASK>
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2023/07/16 06:42 | linux-5.15.y | d54cfc420586 | 35d9ecc5 | .config | console log | report | syz | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | INFO: task hung in io_ring_exit_work | ||
2023/07/02 07:37 | linux-5.15.y | 4af60700a60c | bfc47836 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | INFO: task hung in io_ring_exit_work | ||
2023/07/02 07:06 | linux-5.15.y | 4af60700a60c | bfc47836 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | INFO: task hung in io_ring_exit_work | ||
2023/07/02 06:47 | linux-5.15.y | 4af60700a60c | bfc47836 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | INFO: task hung in io_ring_exit_work | ||
2023/06/27 20:50 | linux-5.15.y | f67653019430 | 4cd5bb25 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | INFO: task hung in io_ring_exit_work | ||
2023/04/10 16:53 | linux-5.15.y | d86dfc4d95cd | 71147e29 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | INFO: task hung in io_ring_exit_work | ||
2023/07/02 08:27 | linux-5.15.y | 4af60700a60c | bfc47836 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | INFO: task hung in io_ring_exit_work | ||
2023/07/02 08:09 | linux-5.15.y | 4af60700a60c | bfc47836 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | INFO: task hung in io_ring_exit_work | ||
2023/07/02 06:42 | linux-5.15.y | 4af60700a60c | bfc47836 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | INFO: task hung in io_ring_exit_work | ||
2023/04/25 10:44 | linux-5.15.y | 3299fb36854f | 65320f8e | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | INFO: task hung in io_ring_exit_work | ||
2023/04/16 15:58 | linux-5.15.y | 4fdad925aa1a | ec410564 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | INFO: task hung in io_ring_exit_work |