syzbot


BUG: workqueue leaked atomic, lock or RCU: kworker/NUM:2H[NUM]

Status: moderation: reported on 2024/12/26 23:48
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+60f200b57316be950a02@syzkaller.appspotmail.com
First crash: 4d17h, last: 4d17h

Sample crash report:
BUG: workqueue leaked atomic, lock or RCU: kworker/2:2H[6122]
     preempt=0x00000000 lock=0->1 RCU=0->0 workfn=snd_vmidi_output_work
INFO: lockdep is turned off.
CPU: 2 UID: 0 PID: 6122 Comm: kworker/2:2H Not tainted 6.13.0-rc3-syzkaller-00301-gbcde95ce32b6 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: events_highpri snd_vmidi_output_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
 process_one_work+0x1170/0x1b30 kernel/workqueue.c:3250
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/12/22 23:44 upstream bcde95ce32b6 b4fbdbd4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: workqueue leaked atomic, lock or RCU: kworker/NUM:2H[NUM]
* Struck through repros no longer work on HEAD.