syzbot


BUG: workqueue leaked lock or atomic in fsnotify_connector_destroy_workfn

Status: auto-obsoleted due to no activity on 2024/07/02 03:17
Reported-by: syzbot+e1af9d4eeddadadfe3b6@syzkaller.appspotmail.com
First crash: 104d, last: 104d

Sample crash report:
BUG: workqueue leaked lock or atomic: kworker/u4:3/0x00000001/338
     last function: fsnotify_connector_destroy_workfn
CPU: 0 PID: 338 Comm: kworker/u4:3 Tainted: G        W         5.15.148-syzkaller-00718-g993bed180178 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: events_unbound fsnotify_connector_destroy_workfn
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
 dump_stack+0x15/0x17 lib/dump_stack.c:113
 process_one_work+0x8d8/0xc10 kernel/workqueue.c:2340
 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
 kthread+0x421/0x510 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>
BUG: workqueue leaked lock or atomic: kworker/u4:3/0x00000001/338
     last function: wb_update_bandwidth_workfn
CPU: 0 PID: 338 Comm: kworker/u4:3 Tainted: G        W         5.15.148-syzkaller-00718-g993bed180178 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: writeback wb_update_bandwidth_workfn
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
 dump_stack+0x15/0x17 lib/dump_stack.c:113
 process_one_work+0x8d8/0xc10 kernel/workqueue.c:2340
 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
 kthread+0x421/0x510 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>
BUG: scheduling while atomic: kworker/u4:3/338/0x00000002
Modules linked in:
Preemption disabled at:
[<ffffffff84c73510>] do_wait_for_common kernel/sched/completion.c:86 [inline]
[<ffffffff84c73510>] __wait_for_common kernel/sched/completion.c:106 [inline]
[<ffffffff84c73510>] wait_for_common+0x290/0x420 kernel/sched/completion.c:117
CPU: 0 PID: 338 Comm: kworker/u4:3 Tainted: G        W         5.15.148-syzkaller-00718-g993bed180178 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: events_unbound toggle_allocation_gate
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
 dump_stack+0x15/0x17 lib/dump_stack.c:113
 __schedule_bug+0x195/0x260 kernel/sched/core.c:5707
 schedule_debug kernel/sched/core.c:5734 [inline]
 __schedule+0xd19/0x1590 kernel/sched/core.c:6402
 schedule+0x11f/0x1e0 kernel/sched/core.c:6595
 schedule_timeout+0x18c/0x370 kernel/time/timer.c:1890
 toggle_allocation_gate+0x22a/0x460 mm/kfence/core.c:736
 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325
 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
 kthread+0x421/0x510 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/04/03 03:13 android13-5.15-lts 993bed180178 7925100d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: workqueue leaked lock or atomic in fsnotify_connector_destroy_workfn
* Struck through repros no longer work on HEAD.