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| Title | Replies (including bot) | Last reply |
|---|---|---|
| [PATCH 5.14 00/48] 5.14.11-rc1 review | 54 (54) | 2021/10/09 04:10 |
| [PATCH AUTOSEL 5.14 01/40] spi: rockchip: handle zero length transfers without timing out | 40 (40) | 2021/09/28 05:55 |
| [PATCH] io_uring: allow conditional reschedule for intensive iterators | 1 (1) | 2021/09/24 14:34 |
| [syzbot] INFO: task hung in io_uring_del_tctx_node | 1 (2) | 2021/09/24 02:43 |
| Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
|---|---|---|---|---|---|---|---|---|---|
| linux-5.15 | INFO: task hung in io_uring_del_tctx_node | 2 | 366d | 370d | 0/3 | auto-obsoleted due to no activity on 2023/08/23 09:02 | |||
| upstream | INFO: task hung in io_uring_del_tctx_node (2) io-uring | C | error | error | 20 | 411d | 773d | 0/26 | auto-obsoleted due to no activity on 2023/07/30 22:24 |
INFO: task syz-executor209:6560 blocked for more than 143 seconds.
Not tainted 5.15.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor209 state:D stack:27808 pid: 6560 ppid: 6558 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xb44/0x5960 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common kernel/locking/mutex.c:669 [inline]
__mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
io_uring_del_tctx_node+0x105/0x350 fs/io_uring.c:9694
io_uring_clean_tctx fs/io_uring.c:9710 [inline]
io_uring_cancel_generic+0x5cb/0x760 fs/io_uring.c:9798
io_uring_files_cancel include/linux/io_uring.h:16 [inline]
do_exit+0x265/0x2a30 kernel/exit.c:780
do_group_exit+0x125/0x310 kernel/exit.c:922
get_signal+0x47f/0x2160 kernel/signal.c:2868
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f6718cf4279
RSP: 002b:00007f6718ca51f8 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 00000000000002ff RBX: 00007f6718d7c408 RCX: 00007f6718cf4279
RDX: 0000000000000000 RSI: 00000000000002ff RDI: 0000000000000003
RBP: 00007f6718d7c400 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6718d7c40c
R13: 00007fff127612df R14: 00007f6718ca5300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8b981b60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446
1 lock held by in:imklog/6259:
#0: ffff88801d9885f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
1 lock held by syz-executor209/6560:
#0: ffff8880786e20a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_uring_del_tctx_node+0x105/0x350 fs/io_uring.c:9694
1 lock held by syz-executor209/6563:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.15.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:295
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6563 Comm: syz-executor209 Not tainted 5.15.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0xd49/0x54a0 kernel/locking/lockdep.c:5025
Code: 03 0f b6 04 02 84 c0 74 0d 3c 03 7f 09 48 8b 3c 24 e8 cb 56 62 00 41 8b 85 18 0a 00 00 83 c0 01 83 f8 2f 41 89 85 18 0a 00 00 <0f> 87 18 0b 00 00 3b 05 fb 20 e9 0d 41 be 01 00 00 00 0f 86 c8 00
RSP: 0018:ffffc9000249f558 EFLAGS: 00000093
RAX: 0000000000000002 RBX: 000000002e9fb5d5 RCX: 2bef69cb239427f6
RDX: 1ffff110030644d3 RSI: 0000000000000001 RDI: ffffffff8fd01c40
RBP: 0000000000000003 R08: 0000000000000000 R09: ffffffff8fcff9e7
R10: fffffbfff1f9ff3c R11: 0000000000086089 R12: ffff8880183226c8
R13: ffff888018321c80 R14: 0000000000000000 R15: 2bef69cb239427f6
FS: 00007f6718c42700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6718d49498 CR3: 0000000019aa0000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5625 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590
rcu_lock_acquire include/linux/rcupdate.h:267 [inline]
rcu_read_lock include/linux/rcupdate.h:687 [inline]
is_bpf_text_address+0x36/0x170 kernel/bpf/core.c:706
kernel_text_address kernel/extable.c:151 [inline]
kernel_text_address+0xbd/0xf0 kernel/extable.c:120
__kernel_text_address+0x9/0x30 kernel/extable.c:105
unwind_get_return_address arch/x86/kernel/unwind_orc.c:318 [inline]
unwind_get_return_address+0x51/0x90 arch/x86/kernel/unwind_orc.c:313
arch_stack_walk+0x93/0xe0 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc mm/kasan/common.c:513 [inline]
____kasan_kmalloc mm/kasan/common.c:472 [inline]
__kasan_kmalloc+0xa4/0xd0 mm/kasan/common.c:522
kmalloc include/linux/slab.h:591 [inline]
io_add_buffers fs/io_uring.c:4385 [inline]
io_provide_buffers fs/io_uring.c:4419 [inline]
io_issue_sqe+0x3289/0x7180 fs/io_uring.c:6731
__io_queue_sqe+0x90/0xb50 fs/io_uring.c:6960
io_req_task_submit+0xbf/0x1b0 fs/io_uring.c:2234
tctx_task_work+0x189/0x6c0 fs/io_uring.c:2159
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
tracehook_notify_signal include/linux/tracehook.h:214 [inline]
handle_signal_work kernel/entry/common.c:146 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x256/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f6718cf4279
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6718c421f8 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 00000000000002ff RBX: 00007f6718d7c438 RCX: 00007f6718cf4279
RDX: 0000000000000000 RSI: 00000000000002ff RDI: 0000000000000003
RBP: 00007f6718d7c430 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6718d7c43c
R13: 00007fff127612df R14: 00007f6718c42300 R15: 0000000000022000
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.811 msecs
----------------
Code disassembly (best guess):
0: 03 0f add (%rdi),%ecx
2: b6 04 mov $0x4,%dh
4: 02 84 c0 74 0d 3c 03 add 0x33c0d74(%rax,%rax,8),%al
b: 7f 09 jg 0x16
d: 48 8b 3c 24 mov (%rsp),%rdi
11: e8 cb 56 62 00 callq 0x6256e1
16: 41 8b 85 18 0a 00 00 mov 0xa18(%r13),%eax
1d: 83 c0 01 add $0x1,%eax
20: 83 f8 2f cmp $0x2f,%eax
23: 41 89 85 18 0a 00 00 mov %eax,0xa18(%r13)
* 2a: 0f 87 18 0b 00 00 ja 0xb48 <-- trapping instruction
30: 3b 05 fb 20 e9 0d cmp 0xde920fb(%rip),%eax # 0xde92131
36: 41 be 01 00 00 00 mov $0x1,%r14d
3c: 0f .byte 0xf
3d: 86 c8 xchg %cl,%al
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021/10/21 07:02 | upstream | 8e37395c3a5d | f111d03b | .config | console log | report | syz | C | ci-upstream-kasan-gce | INFO: task hung in io_uring_del_tctx_node | ||
| 2021/10/19 10:36 | upstream | 519d81956ee2 | 24dc29db | .config | console log | report | syz | C | ci-upstream-kasan-gce-root | INFO: task hung in io_uring_del_tctx_node | ||
| 2021/10/17 23:05 | upstream | d999ade1cc86 | 0c5d9412 | .config | console log | report | syz | C | ci-upstream-kasan-gce-root | INFO: task hung in io_uring_del_tctx_node | ||
| 2021/09/22 15:45 | upstream | 92477dd1faa6 | 169724fe | .config | console log | report | syz | C | ci-upstream-kasan-gce | INFO: task hung in io_uring_del_tctx_node | ||
| 2022/03/06 15:26 | upstream | dcde98da9970 | 7bdd8b2c | .config | console log | report | info | ci-upstream-kasan-gce | INFO: task hung in io_uring_del_tctx_node | |||
| 2022/02/28 09:07 | upstream | 52a025546731 | 45a13a73 | .config | console log | report | info | ci-upstream-kasan-gce | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/12/28 16:55 | upstream | a8ad9a2434dc | 6b3c5e64 | .config | console log | report | info | ci-upstream-kasan-gce-root | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/12/27 01:22 | upstream | fc74e0a40e4f | e4f103c4 | .config | console log | report | info | ci-upstream-kasan-gce-selinux-root | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/12/18 21:40 | upstream | 9eaa88c7036e | 44068e19 | .config | console log | report | info | ci-upstream-kasan-gce-selinux-root | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/12/14 09:10 | upstream | 5472f14a3742 | 5d14b1ea | .config | console log | report | info | ci-upstream-kasan-gce | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/12/10 04:26 | upstream | c741e49150db | 4d4ce9bc | .config | console log | report | info | ci-upstream-kasan-gce | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/12/09 11:04 | upstream | 2a987e65025e | a4a2a501 | .config | console log | report | info | ci-upstream-kasan-gce | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/12/05 20:37 | upstream | 79a72162048e | a617004c | .config | console log | report | info | ci-upstream-kasan-gce-root | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/12/02 02:15 | upstream | 58e1100fdc59 | 61f86278 | .config | console log | report | info | ci-upstream-kasan-gce-smack-root | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/12/01 20:17 | upstream | 58e1100fdc59 | 5fa3eacc | .config | console log | report | info | ci-upstream-kasan-gce-root | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/11/30 08:24 | upstream | d58071a8a76d | d0830353 | .config | console log | report | info | ci-upstream-kasan-gce-smack-root | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/11/25 04:30 | upstream | 5f53fa508db0 | 545ab074 | .config | console log | report | info | ci-upstream-kasan-gce | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/11/25 03:55 | upstream | 5f53fa508db0 | 545ab074 | .config | console log | report | info | ci-upstream-kasan-gce | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/11/22 19:32 | upstream | 136057256686 | 545ab074 | .config | console log | report | info | ci-upstream-kasan-gce-root | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/11/22 08:36 | upstream | 40c93d7fff6f | 4eb20a4e | .config | console log | report | info | ci-upstream-kasan-gce-smack-root | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/11/12 18:06 | upstream | 5833291ab6de | 83f5c9b5 | .config | console log | report | info | ci-upstream-kasan-gce-smack-root | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/11/01 11:48 | upstream | 8bb7eca972ad | 098b5d53 | .config | console log | report | info | ci-upstream-kasan-gce-selinux-root | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/10/30 23:33 | upstream | 119c85055d86 | 098b5d53 | .config | console log | report | info | ci-upstream-kasan-gce-selinux-root | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/10/29 16:54 | upstream | 411a44c24a56 | 2353a3ec | .config | console log | report | info | ci-upstream-kasan-gce | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/10/25 20:40 | upstream | 87066fdd2e30 | 4f0000ee | .config | console log | report | info | ci-upstream-kasan-gce-selinux-root | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/10/22 23:54 | upstream | 64222515138e | 282f03fb | .config | console log | report | info | ci-upstream-kasan-gce | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/09/28 04:44 | upstream | 0513e464f900 | 78494d16 | .config | console log | report | info | ci-upstream-kasan-gce | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/09/27 19:42 | upstream | 5816b3e6577e | 78494d16 | .config | console log | report | info | ci-upstream-kasan-gce-root | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/08/29 12:24 | upstream | 3f5ad13cb012 | be2c130d | .config | console log | report | info | ci-upstream-kasan-gce-smack-root | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/08/14 01:17 | upstream | f8e6dfc64f61 | 3fd2ea69 | .config | console log | report | info | ci-upstream-kasan-gce | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/08/13 07:39 | upstream | f8fbb47c6e86 | 3fd2ea69 | .config | console log | report | info | ci-upstream-kasan-gce | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/07/07 06:05 | upstream | 3dbdb38e2869 | cca78469 | .config | console log | report | info | ci-upstream-kasan-gce-selinux-root | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/11/28 01:32 | upstream | 741392771338 | 63eeac02 | .config | console log | report | info | ci-upstream-kasan-gce-386 | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/11/20 03:55 | upstream | 4c388a8e740d | 3a9d0024 | .config | console log | report | info | ci-upstream-kasan-gce-386 | INFO: task hung in io_uring_del_tctx_node | |||
| 2022/02/22 02:34 | linux-next | ef6b35306dd8 | 6e821dbf | .config | console log | report | info | ci-upstream-linux-next-kasan-gce-root | INFO: task hung in io_uring_del_tctx_node | |||
| 2022/01/08 09:43 | linux-next | b8170452cd51 | 2ca0d385 | .config | console log | report | info | ci-upstream-linux-next-kasan-gce-root | INFO: task hung in io_uring_del_tctx_node | |||
| 2021/11/15 15:40 | linux-next | 09bd48c4acfa | 83f5c9b5 | .config | console log | report | info | ci-upstream-linux-next-kasan-gce-root | INFO: task hung in io_uring_del_tctx_node |