syzbot


INFO: task hung in exit_aio

Status: auto-closed as invalid on 2019/10/25 08:40
Reported-by: syzbot+12810c0e0ce1b0caefbb@syzkaller.appspotmail.com
First crash: 1878d, last: 1878d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in exit_aio (2) fs 3 955d 1033d 0/27 closed as invalid on 2022/02/07 19:09
upstream INFO: task hung in exit_aio fs C 17519 1772d 2387d 0/27 closed as dup on 2018/04/08 22:50

Sample crash report:
request_module: modprobe net-pf-3 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
INFO: task syz-executor.0:14862 blocked for more than 140 seconds.
      Not tainted 4.14.115+ #64
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D28904 14862   1854 0x80000000
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3498
 schedule_timeout+0x736/0xe80 kernel/time/timer.c:1721
 do_wait_for_common kernel/sched/completion.c:91 [inline]
 __wait_for_common kernel/sched/completion.c:112 [inline]
 wait_for_common+0x29c/0x470 kernel/sched/completion.c:123
 exit_aio+0x283/0x300 fs/aio.c:919
 __mmput kernel/fork.c:926 [inline]
 mmput kernel/fork.c:950 [inline]
 mmput+0x80/0x350 kernel/fork.c:945
 exit_mm kernel/exit.c:545 [inline]
 do_exit+0x84e/0x2960 kernel/exit.c:861
INFO: task syz-executor.3:14897 blocked for more than 140 seconds.
      Not tainted 4.14.115+ #64
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D28864 14897  10151 0x80000000
Call Trace:
__request_module: 12487 callbacks suppressed
request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-3, throttling...
request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-3, throttling...
__request_module: 12570 callbacks suppressed
request_module: modprobe net-pf-3 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-3, throttling...
request_module: modprobe net-pf-3 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
request_module: modprobe net-pf-3 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
request_module: modprobe net-pf-3 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
request_module: modprobe net-pf-3 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
request_module: modprobe net-pf-3 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
request_module: modprobe net-pf-3 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
request_module: modprobe net-pf-3 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
request_module: modprobe net-pf-3 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
request_module: modprobe net-pf-3 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-3, throttling...
request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-3, throttling...
request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-3, throttling...
request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-3, throttling...
request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-3, throttling...
request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-3, throttling...
request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-3, throttling...
 schedule+0x92/0x1c0 kernel/sched/core.c:3498
__request_module: 10560 callbacks suppressed
request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-3, throttling...
request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-3, throttling...
request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-3, throttling...
request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-3, throttling...
request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-3, throttling...
request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-3, throttling...
request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-3, throttling...
request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-3, throttling...
__request_module: 10631 callbacks suppressed
request_module: modprobe net-pf-3 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
request_module: modprobe net-pf-3 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
request_module: modprobe net-pf-3 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
request_module: modprobe net-pf-3 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
request_module: modprobe net-pf-3 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
request_module: modprobe net-pf-3 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
request_module: modprobe net-pf-3 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
request_module: modprobe net-pf-3 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
request_module: modprobe net-pf-3 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
request_module: modprobe net-pf-3 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-3, throttling...
request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-3, throttling...
 schedule_timeout+0x736/0xe80 kernel/time/timer.c:1721

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/05/04 05:04 android-4.14 b5123fd47340 d28f4ce5 .config console log report ci-android-414-kasan-gce-root
2019/05/04 01:19 android-4.14 b5123fd47340 d28f4ce5 .config console log report ci-android-414-kasan-gce-root
2019/05/03 17:15 android-4.14 b5123fd47340 1bfa09b9 .config console log report ci-android-414-kasan-gce-root
* Struck through repros no longer work on HEAD.