syzbot


WARNING in pwq_unbound_release_workfn (2)

Status: auto-closed as invalid on 2021/10/20 06:51
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+d04950c1e97f51d0068a@syzkaller.appspotmail.com
First crash: 1067d, last: 1060d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] WARNING in pwq_unbound_release_workfn (2) 1 (2) 2021/07/20 11:29
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in pwq_unbound_release_workfn kernel 1 1264d 1260d 0/27 auto-closed as invalid on 2021/04/30 01:24

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 1711 at kernel/locking/lockdep.c:6305 lockdep_unregister_key+0x19a/0x250 kernel/locking/lockdep.c:6305
Modules linked in:
CPU: 1 PID: 1711 Comm: kworker/1:2 Not tainted 5.14.0-rc2-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Workqueue: events pwq_unbound_release_workfn
RIP: 0010:lockdep_unregister_key+0x19a/0x250 kernel/locking/lockdep.c:6305
Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 8f 00 00 00 4d 89 7d 08 48 b8 22 01 00 00 00 00 ad de 48 89 43 08 eb 02 <0f> 0b 4c 89 f7 ba 01 00 00 00 48 89 ee e8 44 fd ff ff 4c 89 f7 e8
RSP: 0018:ffffc90006297cb0 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffffffff1ad87cd
RDX: 1ffffffff1fcb5ff RSI: 0000000000000000 RDI: ffffffff8fe5aff8
RBP: ffff888027a1b928 R08: 0000000000000001 R09: 0000000000000003
R10: fffff52000c52f78 R11: 0000000000086088 R12: 0000000000000246
R13: dffffc0000000000 R14: ffffffff8fccd858 R15: ffff888029f75470
FS:  0000000000000000(0000) GS:ffff88802cb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561e039ca620 CR3: 0000000047a10000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 wq_unregister_lockdep kernel/workqueue.c:3468 [inline]
 pwq_unbound_release_workfn+0x223/0x2d0 kernel/workqueue.c:3700
 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Crashes (13):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/07/21 15:44 upstream 8cae8cd89f05 29c3f20f .config console log report info ci-qemu-upstream WARNING in pwq_unbound_release_workfn
2021/07/20 10:44 upstream 2734d6c1b1a0 bc48c9ab .config console log report info ci-qemu-upstream WARNING in pwq_unbound_release_workfn
2021/07/19 09:55 upstream 2734d6c1b1a0 e6a17580 .config console log report info ci-qemu-upstream WARNING in pwq_unbound_release_workfn
2021/07/18 13:27 upstream 1d67c8d993ba f115ae98 .config console log report info ci-qemu-upstream WARNING in pwq_unbound_release_workfn
2021/07/17 07:54 upstream d980cc0620ae f115ae98 .config console log report info ci-qemu-upstream WARNING in pwq_unbound_release_workfn
2021/07/16 00:50 upstream dd9c7df94c1b a44e4957 .config console log report info ci-qemu-upstream WARNING in pwq_unbound_release_workfn
2021/07/22 06:50 upstream 7b6ae471e541 29c3f20f .config console log report info ci-qemu-upstream-386 WARNING in pwq_unbound_release_workfn
2021/07/20 04:51 upstream 2734d6c1b1a0 bc48c9ab .config console log report info ci-qemu-upstream-386 WARNING in pwq_unbound_release_workfn
2021/07/19 12:30 upstream 2734d6c1b1a0 e6a17580 .config console log report info ci-qemu-upstream-386 WARNING in pwq_unbound_release_workfn
2021/07/19 03:07 upstream 2734d6c1b1a0 f115ae98 .config console log report info ci-qemu-upstream-386 WARNING in pwq_unbound_release_workfn
2021/07/18 17:15 upstream 1d67c8d993ba f115ae98 .config console log report info ci-qemu-upstream-386 WARNING in pwq_unbound_release_workfn
2021/07/18 17:01 upstream 1d67c8d993ba f115ae98 .config console log report info ci-qemu-upstream-386 WARNING in pwq_unbound_release_workfn
2021/07/16 23:10 upstream d936eb238744 f115ae98 .config console log report info ci-qemu-upstream-386 WARNING in pwq_unbound_release_workfn
* Struck through repros no longer work on HEAD.