syzbot


INFO: task hung in exit_aio (2)

Status: closed as invalid on 2022/02/07 19:09
Reported-by: syzbot+@syzkaller.appspotmail.com
First crash: 464d, last: 386d
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-414 INFO: task hung in exit_aio 3 1309d 1309d 0/1 auto-closed as invalid on 2019/10/25 08:40
upstream INFO: task hung in exit_aio C 17519 1203d 1818d 0/24 closed as dup on 2018/04/08 22:50

Sample crash report:
INFO: task syz-executor.5:10130 blocked for more than 144 seconds.
      Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5  state:D stack:28152 pid:10130 ppid:  7590 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4969 [inline]
 __schedule+0xa9a/0x4940 kernel/sched/core.c:6250
 schedule+0xd2/0x260 kernel/sched/core.c:6323
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
 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+0x174/0x270 kernel/sched/completion.c:138
 exit_aio+0x2c8/0x340 fs/aio.c:893
 __mmput+0x7b/0x4b0 kernel/fork.c:1110
 mmput+0x56/0x60 kernel/fork.c:1134
 exit_mm kernel/exit.c:507 [inline]
 do_exit+0xb27/0x2b40 kernel/exit.c:819
 do_group_exit+0x125/0x310 kernel/exit.c:929
 get_signal+0x47d/0x2220 kernel/signal.c:2830
 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
 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: 0033:0x7f6f0e5e6ae9
RSP: 002b:00007f6f0bb5c218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f6f0e6f9f68 RCX: 00007f6f0e5e6ae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f6f0e6f9f68
RBP: 00007f6f0e6f9f60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6f0e6f9f6c
R13: 00007f6f0ec2db2f R14: 00007f6f0bb5c300 R15: 0000000000022000
 </TASK>

Crashes (3):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2021/11/11 22:59 upstream debe436e77c7 75b04091 .config log report info INFO: task hung in exit_aio
ci-upstream-kasan-gce-smack-root 2021/08/25 23:06 upstream fe67f4dd8daa b599f2fc .config log report info INFO: task hung in exit_aio
ci-upstream-linux-next-kasan-gce-root 2021/10/20 03:11 linux-next 60e8840126bd 466b7db1 .config log report info INFO: task hung in exit_aio
* Struck through repros no longer work on HEAD.