syzbot


BUG: workqueue leaked atomic, lock or RCU: kworker/NUM:1H[NUM]

Status: moderation: reported on 2024/03/19 08:47
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+d3f99c6bd4d3cd61b2cb@syzkaller.appspotmail.com
First crash: 32d, last: 32d

Sample crash report:
BUG: workqueue leaked atomic, lock or RCU: kworker/2:1H[1217]
     preempt=0x00000000 lock=0->1 RCU=0->0 workfn=blk_mq_requeue_work
INFO: lockdep is turned off.
CPU: 2 PID: 1217 Comm: kworker/2:1H Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: kblockd blk_mq_requeue_work

Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:114
 process_one_work+0x11bd/0x1a60 kernel/workqueue.c:3275
 process_scheduled_works kernel/workqueue.c:3335 [inline]
 worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416
 kthread+0x2c1/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/03/15 08:36 upstream fe46a7dd189e d615901c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: workqueue leaked atomic, lock or RCU: kworker/NUM:1H[NUM]
* Struck through repros no longer work on HEAD.