WARNING: locking bug in gfs2_quotad (2)

Status: auto-obsoleted due to no activity on 2026/07/27 05:34
Reported-by: syzbot+c062679d882be99eccbc@syzkaller.appspotmail.com
First crash: 102d, last: 102d
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING: locking bug in gfs2_quotad 4 5 35d 180d 0/3 upstream: reported on 2026/01/30 04:46
linux-5.15 WARNING: locking bug in gfs2_quotad 4 1 218d 218d 0/3 auto-obsoleted due to no activity on 2026/04/01 14:07

Sample crash report:
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(1)
WARNING: CPU: 1 PID: 5214 at kernel/locking/lockdep.c:201 hlock_class kernel/locking/lockdep.c:-1 [inline]
WARNING: CPU: 1 PID: 5214 at kernel/locking/lockdep.c:201 check_wait_context kernel/locking/lockdep.c:4686 [inline]
WARNING: CPU: 1 PID: 5214 at kernel/locking/lockdep.c:201 __lock_acquire+0x7dc/0x7d10 kernel/locking/lockdep.c:4962
Modules linked in:
CPU: 1 PID: 5214 Comm: gfs2_quotad Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:hlock_class kernel/locking/lockdep.c:201 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4686 [inline]
RIP: 0010:__lock_acquire+0x7dc/0x7d10 kernel/locking/lockdep.c:4962
Code: 83 3d 3f 0a 2d 0c 00 0f 85 c7 fd ff ff 48 c7 c7 20 26 2b 8a 48 c7 c6 c0 28 2b 8a e8 7e 6c 54 08 48 ba 00 00 00 00 00 fc ff df <0f> 0b e9 a3 fd ff ff e8 78 a8 83 02 85 c0 0f 84 5c 0a 00 00 48 c7
RSP: 0018:ffffc900034c7900 EFLAGS: 00010046
RAX: be8ef0697e996500 RBX: 0000000000001a46 RCX: ffff888020843b80
RDX: dffffc0000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: ffffc900034c7b50 R08: ffff8880b912795b R09: 1ffff11017224f2b
R10: dffffc0000000000 R11: ffffed1017224f2c R12: ffff888020844690
R13: ffff888020843b80 R14: 0000000000000000 R15: ffff888020844670
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa2c2043eb8 CR3: 0000000064955000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xb0/0x100 kernel/locking/spinlock.c:162
 finish_wait+0xb5/0x1d0 kernel/sched/wait.c:407
 gfs2_quotad+0x710/0x890 fs/gfs2/quota.c:1605
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/04/18 05:33 linux-5.15.y 91d48252ad4b 5be7a9de .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in gfs2_quotad
* Struck through repros no longer work on HEAD.