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INFO: task hung in sys_io_destroy

Status: upstream: reported C repro on 2021/07/21 10:39
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+d40a01556c761b2cb385@syzkaller.appspotmail.com
First crash: 1792d, last: 95d
Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: INFO: task hung in io_destroy (log)
Repro: C syz .config
  
Fix bisection the fix commit could be any of (bisect log):
  1d67c8d993ba Merge tag 'soc-fixes-5.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
  42226c989789 Linux 5.18-rc7
   
▶ ▼ ✨ AI Jobs (4)
ID Workflow Result Correct Bug Created Started Finished Revision Error
1632e080-d8c2-4f68-a261-b1c28bd39d19 assessment-security 💥 INFO: task hung in sys_io_destroy 2026/06/14 02:05 2026/06/14 02:05 2026/06/14 02:05 4f06757f683a802254a4c8edbfe67ff801904c5e failed to deserialize syz repro: call #0 clone: use of a disabled call
86839af2-932e-4d75-80ac-fae44b2c1def assessment-security 💥 INFO: task hung in sys_io_destroy 2026/06/09 17:15 2026/06/09 17:15 2026/06/09 17:15 c36c07f6c1f2230a36374cbd22235f635e8f9284 failed to deserialize syz repro: call #0 clone: use of a disabled call
f584f137-86e8-4b08-8f0d-9f397ac85a20 assessment-security 💥 INFO: task hung in sys_io_destroy 2026/06/02 13:51 2026/06/02 13:51 2026/06/02 13:51 1095583bae1d2729a3b4be301cb6ddc85ced9e38 failed to deserialize syz repro: call #0 clone: use of a disabled call
2269b867-3ecb-431f-b0c0-601a2542c912 assessment-security 💥 INFO: task hung in sys_io_destroy 2026/05/25 02:17 2026/05/25 02:17 2026/05/25 02:17 c69befb30ac10e158cc9d1557b508ee3f0eca1de failed to deserialize syz repro: call #0 clone: use of a disabled call
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] INFO: task hung in sys_io_destroy 4 (5) 2021/08/09 16:38
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-6-12 INFO: task hung in io_destroy 1 1 268d 268d 0/1 auto-obsoleted due to no activity on 2025/12/18 14:09
▶ ▼ Last patch testing requests (11)
Created Duration User Patch Repo Result
2026/05/21 18:19 1h24m retest repro upstream log
2026/05/21 17:17 1h28m retest repro upstream log
2026/03/12 10:16 56m retest repro upstream report log
2026/03/12 10:09 55m retest repro upstream report log
2026/01/01 05:31 1h00m retest repro upstream report log
2025/10/23 04:36 29m retest repro upstream report log
2025/08/13 07:57 1h01m retest repro upstream report log
2025/06/03 13:25 32m retest repro upstream report log
2025/03/25 01:17 23m retest repro upstream report log
2025/01/14 00:54 18m retest repro upstream report log
2021/08/28 15:25 12m phind.uet@gmail.com linux-next report log
▶ ▼ Fix bisection attempts (10)
Created Duration User Patch Repo Result
2022/05/17 15:42 19m bisect fix upstream OK (2) job log
2022/04/17 13:57 23m bisect fix upstream OK (0) job log log
2022/03/18 13:32 24m bisect fix upstream OK (0) job log log
2022/02/16 10:39 24m bisect fix upstream OK (0) job log log
2022/01/17 10:14 25m bisect fix upstream OK (0) job log log
2021/12/18 09:39 25m bisect fix upstream OK (0) job log log
2021/11/18 04:21 30m bisect fix upstream OK (0) job log log
2021/10/19 03:53 25m bisect fix upstream OK (0) job log log
2021/09/19 01:33 25m bisect fix upstream OK (0) job log log
2021/08/20 01:07 25m bisect fix upstream OK (0) job log log

Sample crash report:
INFO: task syz-executor299:8807 blocked for more than 143 seconds.
      Not tainted 5.14.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor299 state:D stack:29400 pid: 8807 ppid:  8806 flags:0x00000000
Call Trace:
 context_switch kernel/sched/core.c:4683 [inline]
 __schedule+0x93a/0x26f0 kernel/sched/core.c:5940
 schedule+0xd3/0x270 kernel/sched/core.c:6019
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1854
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x176/0x280 kernel/sched/completion.c:138
 __do_sys_io_destroy fs/aio.c:1402 [inline]
 __se_sys_io_destroy fs/aio.c:1380 [inline]
 __x64_sys_io_destroy+0x17e/0x1e0 fs/aio.c:1380
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x445899
RSP: 002b:00007f9b5a7e2318 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf
RAX: ffffffffffffffda RBX: 00000000004ca428 RCX: 0000000000445899
RDX: 0000000000445899 RSI: 00000000000f4240 RDI: 00007f9b5a7c1000
RBP: 00000000004ca420 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000049a074
R13: 00007ffdd09518ef R14: 00007f9b5a7e2400 R15: 0000000000022000
INFO: task syz-executor299:8843 blocked for more than 143 seconds.
      Not tainted 5.14.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor299 state:D stack:29184 pid: 8843 ppid:  8842 flags:0x00000000
Call Trace:
 context_switch kernel/sched/core.c:4683 [inline]
 __schedule+0x93a/0x26f0 kernel/sched/core.c:5940
 schedule+0xd3/0x270 kernel/sched/core.c:6019
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1854
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x176/0x280 kernel/sched/completion.c:138
 __do_sys_io_destroy fs/aio.c:1402 [inline]
 __se_sys_io_destroy fs/aio.c:1380 [inline]
 __x64_sys_io_destroy+0x17e/0x1e0 fs/aio.c:1380
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x445899
RSP: 002b:00007f9b5a7e2318 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf
RAX: ffffffffffffffda RBX: 00000000004ca428 RCX: 0000000000445899
RDX: 0000000000445899 RSI: 0000000000000000 RDI: 00007f9b5a7c1000
RBP: 00000000004ca420 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000049a074
R13: 00007ffdd09518ef R14: 00007f9b5a7e2400 R15: 0000000000022000
INFO: task syz-executor299:9076 blocked for more than 143 seconds.
      Not tainted 5.14.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor299 state:D stack:29216 pid: 9076 ppid:  9075 flags:0x00000000
Call Trace:
 context_switch kernel/sched/core.c:4683 [inline]
 __schedule+0x93a/0x26f0 kernel/sched/core.c:5940
 schedule+0xd3/0x270 kernel/sched/core.c:6019
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1854
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x176/0x280 kernel/sched/completion.c:138
 __do_sys_io_destroy fs/aio.c:1402 [inline]
 __se_sys_io_destroy fs/aio.c:1380 [inline]
 __x64_sys_io_destroy+0x17e/0x1e0 fs/aio.c:1380
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x445899
RSP: 002b:00007f9b5a7e2318 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf
RAX: ffffffffffffffda RBX: 00000000004ca428 RCX: 0000000000445899
RDX: 0000000000445899 RSI: 0000000000000000 RDI: 00007f9b5a7c1000
RBP: 00000000004ca420 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000049a074
R13: 00007ffdd09518ef R14: 00007f9b5a7e2400 R15: 0000000000022000
INFO: task syz-executor299:9188 blocked for more than 143 seconds.
      Not tainted 5.14.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor299 state:D stack:29400 pid: 9188 ppid:  9187 flags:0x00000000
Call Trace:
 context_switch kernel/sched/core.c:4683 [inline]
 __schedule+0x93a/0x26f0 kernel/sched/core.c:5940
 schedule+0xd3/0x270 kernel/sched/core.c:6019
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1854
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x176/0x280 kernel/sched/completion.c:138
 __do_sys_io_destroy fs/aio.c:1402 [inline]
 __se_sys_io_destroy fs/aio.c:1380 [inline]
 __x64_sys_io_destroy+0x17e/0x1e0 fs/aio.c:1380
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x445899
RSP: 002b:00007f9b5a7e2318 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf
RAX: ffffffffffffffda RBX: 00000000004ca428 RCX: 0000000000445899
RDX: 0000000000445899 RSI: 00000000000f4240 RDI: 00007f9b5a7c1000
RBP: 00000000004ca420 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000049a074
R13: 00007ffdd09518ef R14: 00007f9b5a7e2400 R15: 0000000000022000
INFO: task syz-executor299:9440 blocked for more than 144 seconds.
      Not tainted 5.14.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor299 state:D stack:29184 pid: 9440 ppid:  9439 flags:0x00000000
Call Trace:
 context_switch kernel/sched/core.c:4683 [inline]
 __schedule+0x93a/0x26f0 kernel/sched/core.c:5940
 schedule+0xd3/0x270 kernel/sched/core.c:6019
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1854
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x176/0x280 kernel/sched/completion.c:138
 __do_sys_io_destroy fs/aio.c:1402 [inline]
 __se_sys_io_destroy fs/aio.c:1380 [inline]
 __x64_sys_io_destroy+0x17e/0x1e0 fs/aio.c:1380
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x445899
RSP: 002b:00007f9b5a7e2318 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf
RAX: ffffffffffffffda RBX: 00000000004ca428 RCX: 0000000000445899
RDX: 0000000000445899 RSI: 0000000000000000 RDI: 00007f9b5a7c1000
RBP: 00000000004ca420 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000049a074
R13: 00007ffdd09518ef R14: 00007f9b5a7e2400 R15: 0000000000022000
INFO: task syz-executor299:9476 blocked for more than 144 seconds.
      Not tainted 5.14.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor299 state:D stack:29752 pid: 9476 ppid:  9475 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4683 [inline]
 __schedule+0x93a/0x26f0 kernel/sched/core.c:5940
 schedule+0xd3/0x270 kernel/sched/core.c:6019
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1854
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x176/0x280 kernel/sched/completion.c:138
 __do_sys_io_destroy fs/aio.c:1402 [inline]
 __se_sys_io_destroy fs/aio.c:1380 [inline]
 __x64_sys_io_destroy+0x17e/0x1e0 fs/aio.c:1380
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x445899
RSP: 002b:00007f9b5a7e2318 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf
RAX: ffffffffffffffda RBX: 00000000004ca428 RCX: 0000000000445899
RDX: 0000000000445899 RSI: 00000000000f4240 RDI: 00007f9b5a7c1000
RBP: 00000000004ca420 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000049a074
R13: 00007ffdd09518ef R14: 00007f9b5a7e2400 R15: 0000000000022000
INFO: task syz-executor299:9484 blocked for more than 144 seconds.
      Not tainted 5.14.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor299 state:D stack:29800 pid: 9484 ppid:  9483 flags:0x00000000
Call Trace:
 context_switch kernel/sched/core.c:4683 [inline]
 __schedule+0x93a/0x26f0 kernel/sched/core.c:5940
 schedule+0xd3/0x270 kernel/sched/core.c:6019
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1854
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x176/0x280 kernel/sched/completion.c:138
 __do_sys_io_destroy fs/aio.c:1402 [inline]
 __se_sys_io_destroy fs/aio.c:1380 [inline]
 __x64_sys_io_destroy+0x17e/0x1e0 fs/aio.c:1380
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x445899
RSP: 002b:00007f9b5a7e2318 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf
RAX: ffffffffffffffda RBX: 00000000004ca428 RCX: 0000000000445899
RDX: 0000000000445899 RSI: 00000000000f4240 RDI: 00007f9b5a7c1000
RBP: 00000000004ca420 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000049a074
R13: 00007ffdd09518ef R14: 00007f9b5a7e2400 R15: 0000000000022000
INFO: task syz-executor299:9536 blocked for more than 144 seconds.
      Not tainted 5.14.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor299 state:D stack:29800 pid: 9536 ppid:  9535 flags:0x00000000
Call Trace:
 context_switch kernel/sched/core.c:4683 [inline]
 __schedule+0x93a/0x26f0 kernel/sched/core.c:5940
 schedule+0xd3/0x270 kernel/sched/core.c:6019
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1854
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x176/0x280 kernel/sched/completion.c:138
 __do_sys_io_destroy fs/aio.c:1402 [inline]
 __se_sys_io_destroy fs/aio.c:1380 [inline]
 __x64_sys_io_destroy+0x17e/0x1e0 fs/aio.c:1380
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x445899
RSP: 002b:00007f9b5a7e2318 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf
RAX: ffffffffffffffda RBX: 00000000004ca428 RCX: 0000000000445899
RDX: 0000000000445899 RSI: 00000000000f4240 RDI: 00007f9b5a7c1000
RBP: 00000000004ca420 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000049a074
R13: 00007ffdd09518ef R14: 00007f9b5a7e2400 R15: 0000000000022000
INFO: task syz-executor299:9768 blocked for more than 144 seconds.
      Not tainted 5.14.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor299 state:D stack:29696 pid: 9768 ppid:  9767 flags:0x00000000
Call Trace:
 context_switch kernel/sched/core.c:4683 [inline]
 __schedule+0x93a/0x26f0 kernel/sched/core.c:5940
 schedule+0xd3/0x270 kernel/sched/core.c:6019
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1854
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x176/0x280 kernel/sched/completion.c:138
 __do_sys_io_destroy fs/aio.c:1402 [inline]
 __se_sys_io_destroy fs/aio.c:1380 [inline]
 __x64_sys_io_destroy+0x17e/0x1e0 fs/aio.c:1380
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x445899
RSP: 002b:00007f9b5a7e2318 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf
RAX: ffffffffffffffda RBX: 00000000004ca428 RCX: 0000000000445899
RDX: 0000000000445899 RSI: 00000000000f4240 RDI: 00007f9b5a7c1000
RBP: 00000000004ca420 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000049a074
R13: 00007ffdd09518ef R14: 00007f9b5a7e2400 R15: 0000000000022000
INFO: task syz-executor299:9772 blocked for more than 145 seconds.
      Not tainted 5.14.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor299 state:D stack:28832 pid: 9772 ppid:  9771 flags:0x00000000
Call Trace:
 context_switch kernel/sched/core.c:4683 [inline]
 __schedule+0x93a/0x26f0 kernel/sched/core.c:5940
 schedule+0xd3/0x270 kernel/sched/core.c:6019
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1854
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x176/0x280 kernel/sched/completion.c:138
 __do_sys_io_destroy fs/aio.c:1402 [inline]
 __se_sys_io_destroy fs/aio.c:1380 [inline]
 __x64_sys_io_destroy+0x17e/0x1e0 fs/aio.c:1380
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x445899
RSP: 002b:00007f9b5a7e2318 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf
RAX: ffffffffffffffda RBX: 00000000004ca428 RCX: 0000000000445899
RDX: 0000000000445899 RSI: 0000000000000000 RDI: 00007f9b5a7c1000
RBP: 00000000004ca420 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000049a074
R13: 00007ffdd09518ef R14: 00007f9b5a7e2400 R15: 0000000000022000

Showing all locks held in the system:
1 lock held by khungtaskd/1656:
 #0: ffffffff8b97b9c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446
1 lock held by in:imklog/8155:
 #0: ffff888033cdb270 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:974

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 1656 Comm: khungtaskd Not tainted 5.14.0-rc1-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:105
 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1b3/0x230 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+0xd0a/0xfc0 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4866 Comm: systemd-journal Not tainted 5.14.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:clear_page_erms+0x7/0x10 arch/x86/lib/clear_page_64.S:49
Code: 48 89 47 18 48 89 47 20 48 89 47 28 48 89 47 30 48 89 47 38 48 8d 7f 40 75 d9 90 c3 0f 1f 80 00 00 00 00 b9 00 10 00 00 31 c0 <f3> aa c3 cc cc cc cc cc cc 41 57 41 56 41 55 41 54 55 53 48 89 fb
RSP: 0018:ffffc900015ff850 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffea0000a365c0 RCX: 00000000000004c0
RDX: 1ffff11005878d15 RSI: 0000000000000008 RDI: ffff888028d97b40
RBP: ffff88802c3c54c0 R08: 0000000000000001 R09: ffffed10051b2000
R10: fffff94000146c86 R11: 0000000000000003 R12: ffffed1005878d69
R13: dffffc0000000000 R14: ffffea0000a36600 R15: ffff88802c3c6b48
FS:  00007fc8b802f8c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc8b5421000 CR3: 0000000021001000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 clear_page arch/x86/include/asm/page_64.h:49 [inline]
 clear_highpage include/linux/highmem.h:184 [inline]
 kernel_init_free_pages.part.0+0x99/0x120 mm/page_alloc.c:1283
 kernel_init_free_pages mm/page_alloc.c:1272 [inline]
 post_alloc_hook+0x145/0x1e0 mm/page_alloc.c:2423
 prep_new_page mm/page_alloc.c:2433 [inline]
 get_page_from_freelist+0xa72/0x2f80 mm/page_alloc.c:4166
 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5388
 alloc_pages+0x18c/0x2a0 mm/mempolicy.c:2244
 alloc_slab_page mm/slub.c:1688 [inline]
 allocate_slab+0x32e/0x4b0 mm/slub.c:1828
 new_slab mm/slub.c:1891 [inline]
 new_slab_objects mm/slub.c:2637 [inline]
 ___slab_alloc+0x4ba/0x820 mm/slub.c:2800
 __slab_alloc.constprop.0+0xa7/0xf0 mm/slub.c:2840
 slab_alloc_node mm/slub.c:2922 [inline]
 slab_alloc mm/slub.c:2964 [inline]
 kmem_cache_alloc+0x3e1/0x4a0 mm/slub.c:2969
 getname_flags.part.0+0x50/0x4f0 fs/namei.c:138
 getname_flags include/linux/audit.h:319 [inline]
 getname+0x8e/0xd0 fs/namei.c:209
 do_sys_openat2+0xf5/0x420 fs/open.c:1198
 do_sys_open fs/open.c:1220 [inline]
 __do_sys_open fs/open.c:1228 [inline]
 __se_sys_open fs/open.c:1224 [inline]
 __x64_sys_open+0x119/0x1c0 fs/open.c:1224
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fc8b75be840
Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24
RSP: 002b:00007ffee57eb7d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007ffee57ebae0 RCX: 00007fc8b75be840
RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 0000564a6c2e8060
RBP: 000000000000000d R08: 000000000000c0c1 R09: 00000000ffffffff
R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000564a6c2da040 R14: 00007ffee57ebaa0 R15: 0000564a6c2e80b0

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/07/18 22:03 upstream 1d67c8d993ba f115ae98 .config console log report syz C ci-upstream-kasan-gce INFO: task hung in sys_io_destroy
2021/07/18 16:57 upstream 1d67c8d993ba f115ae98 .config console log report info ci-upstream-kasan-gce INFO: task hung in sys_io_destroy
2025/09/04 05:50 upstream b9a10f876409 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in io_destroy
* Struck through repros no longer work on HEAD.