| Title | Replies (including bot) | Last reply |
|---|---|---|
| [syzbot] [input?] [usb?] [io-uring?] INFO: task hung in io_wq_put_and_exit (5) | 1 (3) | 2025/07/24 03:38 |
syzbot |
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| Title | Replies (including bot) | Last reply |
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| [syzbot] [input?] [usb?] [io-uring?] INFO: task hung in io_wq_put_and_exit (5) | 1 (3) | 2025/07/24 03:38 |
| Kernel | Title | Rank 🛈 | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| linux-5.15 | INFO: task hung in io_wq_put_and_exit | 1 | 1 | 510d | 510d | 0/3 | auto-obsoleted due to no activity on 2024/06/19 08:55 | |||
| linux-6.6 | INFO: task hung in io_wq_put_and_exit origin:lts-only | 1 | syz | 1 | 36d | 39d | 0/2 | upstream: reported syz repro on 2025/06/25 22:50 | ||
| upstream | INFO: task hung in io_wq_put_and_exit (3) io-uring | 1 | C | error | unreliable | 75 | 834d | 1229d | 0/29 | auto-obsoleted due to no activity on 2023/08/20 08:26 |
| upstream | INFO: task hung in io_wq_put_and_exit io-uring fs | 1 | C | unreliable | 628 | 1363d | 1424d | 20/29 | fixed on 2021/11/10 00:50 | |
| upstream | INFO: task hung in io_wq_put_and_exit (2) fs | 1 | 22 | 1332d | 1361d | 0/29 | closed as invalid on 2022/02/08 09:40 | |||
| upstream | INFO: task hung in io_wq_put_and_exit (4) io-uring | 1 | C | unreliable | 86 | 58d | 288d | 28/29 | fixed on 2025/06/10 16:19 |
INFO: task syz-executor971:5849 blocked for more than 143 seconds.
Not tainted 6.16.0-rc6-syzkaller-00279-gbf61759db409 #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor971 state:D stack:26488 pid:5849 tgid:5849 ppid:5844 task_flags:0x400148 flags:0x00024002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x116a/0x5de0 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6879
schedule_timeout+0x257/0x290 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x2ff/0x4e0 kernel/sched/completion.c:116
io_wq_exit_workers io_uring/io-wq.c:1319 [inline]
io_wq_put_and_exit+0x271/0x8d0 io_uring/io-wq.c:1347
io_uring_clean_tctx+0x10d/0x190 io_uring/tctx.c:203
io_uring_cancel_generic+0x69c/0x9a0 io_uring/io_uring.c:3212
io_uring_files_cancel include/linux/io_uring.h:19 [inline]
do_exit+0x2ce/0x2bd0 kernel/exit.c:911
do_group_exit+0xd3/0x2a0 kernel/exit.c:1105
__do_sys_exit_group kernel/exit.c:1116 [inline]
__se_sys_exit_group kernel/exit.c:1114 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1114
x64_sys_call+0x1530/0x1730 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f141ec08e39
RSP: 002b:00007ffcd1b0b6e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f141ec08e39
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 00007f141ec843b0 R08: ffffffffffffffb8 R09: 0000000000000000
R10: 000000000000000e R11: 0000000000000246 R12: 00007f141ec843b0
R13: 0000000000000000 R14: 00007f141ec880c0 R15: 00007f141ebd7020
</TASK>
INFO: task syz-executor971:5850 blocked for more than 143 seconds.
Not tainted 6.16.0-rc6-syzkaller-00279-gbf61759db409 #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor971 state:D stack:26488 pid:5850 tgid:5850 ppid:5846 task_flags:0x400148 flags:0x00024002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x116a/0x5de0 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6879
schedule_timeout+0x257/0x290 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x2ff/0x4e0 kernel/sched/completion.c:116
io_wq_exit_workers io_uring/io-wq.c:1319 [inline]
io_wq_put_and_exit+0x271/0x8d0 io_uring/io-wq.c:1347
io_uring_clean_tctx+0x10d/0x190 io_uring/tctx.c:203
io_uring_cancel_generic+0x69c/0x9a0 io_uring/io_uring.c:3212
io_uring_files_cancel include/linux/io_uring.h:19 [inline]
do_exit+0x2ce/0x2bd0 kernel/exit.c:911
do_group_exit+0xd3/0x2a0 kernel/exit.c:1105
__do_sys_exit_group kernel/exit.c:1116 [inline]
__se_sys_exit_group kernel/exit.c:1114 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1114
x64_sys_call+0x1530/0x1730 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f141ec08e39
RSP: 002b:00007ffcd1b0b6e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f141ec08e39
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 00007f141ec843b0 R08: ffffffffffffffb8 R09: 0000000000000000
R10: 000000000000000e R11: 0000000000000246 R12: 00007f141ec843b0
R13: 0000000000000000 R14: 00007f141ec880c0 R15: 00007f141ebd7020
</TASK>
INFO: task syz-executor971:5851 blocked for more than 143 seconds.
Not tainted 6.16.0-rc6-syzkaller-00279-gbf61759db409 #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor971 state:D stack:27256 pid:5851 tgid:5851 ppid:5845 task_flags:0x400148 flags:0x00024002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x116a/0x5de0 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6879
schedule_timeout+0x257/0x290 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x2ff/0x4e0 kernel/sched/completion.c:116
io_wq_exit_workers io_uring/io-wq.c:1319 [inline]
io_wq_put_and_exit+0x271/0x8d0 io_uring/io-wq.c:1347
io_uring_clean_tctx+0x10d/0x190 io_uring/tctx.c:203
io_uring_cancel_generic+0x69c/0x9a0 io_uring/io_uring.c:3212
io_uring_files_cancel include/linux/io_uring.h:19 [inline]
do_exit+0x2ce/0x2bd0 kernel/exit.c:911
do_group_exit+0xd3/0x2a0 kernel/exit.c:1105
__do_sys_exit_group kernel/exit.c:1116 [inline]
__se_sys_exit_group kernel/exit.c:1114 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1114
x64_sys_call+0x1530/0x1730 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f141ec08e39
RSP: 002b:00007ffcd1b0b6e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f141ec08e39
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 00007f141ec843b0 R08: ffffffffffffffb8 R09: 0000000000000000
R10: 000000000000000e R11: 0000000000000246 R12: 00007f141ec843b0
R13: 0000000000000000 R14: 00007f141ec880c0 R15: 00007f141ebd7020
</TASK>
INFO: task syz-executor971:5852 blocked for more than 144 seconds.
Not tainted 6.16.0-rc6-syzkaller-00279-gbf61759db409 #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor971 state:D stack:26312 pid:5852 tgid:5852 ppid:5848 task_flags:0x400148 flags:0x00024002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x116a/0x5de0 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6879
schedule_timeout+0x257/0x290 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x2ff/0x4e0 kernel/sched/completion.c:116
io_wq_exit_workers io_uring/io-wq.c:1319 [inline]
io_wq_put_and_exit+0x271/0x8d0 io_uring/io-wq.c:1347
io_uring_clean_tctx+0x10d/0x190 io_uring/tctx.c:203
io_uring_cancel_generic+0x69c/0x9a0 io_uring/io_uring.c:3212
io_uring_files_cancel include/linux/io_uring.h:19 [inline]
do_exit+0x2ce/0x2bd0 kernel/exit.c:911
do_group_exit+0xd3/0x2a0 kernel/exit.c:1105
__do_sys_exit_group kernel/exit.c:1116 [inline]
__se_sys_exit_group kernel/exit.c:1114 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1114
x64_sys_call+0x1530/0x1730 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f141ec08e39
RSP: 002b:00007ffcd1b0b6e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f141ec08e39
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 00007f141ec843b0 R08: ffffffffffffffb8 R09: 0000000000000000
R10: 000000000000000e R11: 0000000000000246 R12: 00007f141ec843b0
R13: 0000000000000000 R14: 00007f141ec880c0 R15: 00007f141ebd7020
</TASK>
INFO: task syz-executor971:5853 blocked for more than 144 seconds.
Not tainted 6.16.0-rc6-syzkaller-00279-gbf61759db409 #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor971 state:D stack:27080 pid:5853 tgid:5853 ppid:5847 task_flags:0x400148 flags:0x00024002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x116a/0x5de0 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6879
schedule_timeout+0x257/0x290 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x2ff/0x4e0 kernel/sched/completion.c:116
io_wq_exit_workers io_uring/io-wq.c:1319 [inline]
io_wq_put_and_exit+0x271/0x8d0 io_uring/io-wq.c:1347
io_uring_clean_tctx+0x10d/0x190 io_uring/tctx.c:203
io_uring_cancel_generic+0x69c/0x9a0 io_uring/io_uring.c:3212
io_uring_files_cancel include/linux/io_uring.h:19 [inline]
do_exit+0x2ce/0x2bd0 kernel/exit.c:911
do_group_exit+0xd3/0x2a0 kernel/exit.c:1105
__do_sys_exit_group kernel/exit.c:1116 [inline]
__se_sys_exit_group kernel/exit.c:1114 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1114
x64_sys_call+0x1530/0x1730 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f141ec08e39
RSP: 002b:00007ffcd1b0b6e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f141ec08e39
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 00007f141ec843b0 R08: ffffffffffffffb8 R09: 0000000000000000
R10: 000000000000000e R11: 0000000000000246 R12: 00007f141ec843b0
R13: 0000000000000000 R14: 00007f141ec880c0 R15: 00007f141ebd7020
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8e5c4e00 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e5c4e00 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e5c4e00 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6770
2 locks held by getty/5594:
#0: ffff888032cc90a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900036cb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41b/0x14f0 drivers/tty/n_tty.c:2222
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-syzkaller-00279-gbf61759db409 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
watchdog+0xf70/0x12c0 kernel/hung_task.c:470
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.16.0-rc6-syzkaller-00279-gbf61759db409 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:82
Code: 7b 6d 02 e9 83 fb 02 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 43 99 23 00 fb f4 <c3> cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffffff8e207e08 EFLAGS: 000002c6
RAX: 00000000000d6725 RBX: 0000000000000000 RCX: ffffffff8b867c99
RDX: 0000000000000000 RSI: ffffffff8de2fff6 RDI: ffffffff8c157460
RBP: fffffbfff1c52ef0 R08: 0000000000000001 R09: ffffed1017086645
R10: ffff8880b843322b R11: 0000000000000001 R12: 0000000000000000
R13: ffffffff8e297780 R14: ffffffff90a94550 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff888124720000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e50c02d168 CR3: 000000000e382000 CR4: 00000000003526f0
Call Trace:
<TASK>
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:749
default_idle_call+0x6d/0xb0 kernel/sched/idle.c:117
cpuidle_idle_call kernel/sched/idle.c:185 [inline]
do_idle+0x391/0x510 kernel/sched/idle.c:325
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:423
rest_init+0x16b/0x2b0 init/main.c:745
start_kernel+0x3ee/0x4d0 init/main.c:1102
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:307
x86_64_start_kernel+0x130/0x190 arch/x86/kernel/head64.c:288
common_startup_64+0x13e/0x148
</TASK>
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025/07/20 10:54 | upstream | bf61759db409 | 7117feec | .config | strace log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-selinux-root | INFO: task hung in io_wq_put_and_exit | |
| 2025/07/22 01:40 | upstream | 89be9a83ccf1 | 0b3788a0 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in io_wq_put_and_exit | ||
| 2025/07/20 06:11 | upstream | bf61759db409 | 7117feec | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-selinux-root | INFO: task hung in io_wq_put_and_exit | ||
| 2025/07/10 06:05 | upstream | 8c2e52ebbe88 | 956bd956 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | INFO: task hung in io_wq_put_and_exit | ||
| 2025/06/15 01:24 | upstream | 4774cfe3543a | 5f4b362d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-smack-root | INFO: task hung in io_wq_put_and_exit |