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kernel BUG in gfs2_glock_nq

Status: upstream: reported C repro on 2023/03/12 01:31
Bug presence: origin:upstream
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+d9b5bfddf84d608ebd95@syzkaller.appspotmail.com
First crash: 1052d, last: 3h41m
Fix bisection: the issue occurs on the latest tested release (bisect log)
Crash: kernel BUG in gfs2_glock_nq (log)
Repro: C syz .config
  
▶ ▼ Bug presence (3)
Date Name Commit Repro Result
2025/12/12 linux-6.1.y (ToT) 50cbba13faa2 C [report] kernel BUG in gfs2_glock_nq
2023/05/15 upstream (ToT) f1fcbaa18b28 C [report] kernel BUG in gfs2_glock_nq
2025/12/12 upstream (ToT) d358e5254674 C Didn't crash
▶ ▼ Similar bugs (9)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 kernel BUG in gfs2_glock_nq -1 2 1470d 1514d 0/1 auto-closed as invalid on 2022/05/17 22:53
linux-4.19 kernel BUG in gfs2_glock_nq -1 1 1750d 1750d 0/1 auto-closed as invalid on 2021/08/11 04:31
linux-4.19 kernel BUG in gfs2_glock_nq (2) gfs2 -1 C error 52 1057d 1596d 0/1 upstream: reported C repro on 2021/09/14 01:12
upstream kernel BUG in gfs2_glock_nq gfs2 -1 2 1525d 1515d 0/29 auto-closed as invalid on 2022/03/23 19:53
linux-6.6 kernel BUG in gfs2_glock_nq origin:lts-only -1 C done 291 3h33m 218d 0/2 upstream: reported C repro on 2025/06/22 16:51
linux-4.14 kernel BUG in gfs2_glock_nq (2) gfs2 -1 C 7 1061d 1341d 0/1 upstream: reported C repro on 2022/05/26 14:43
upstream kernel BUG in gfs2_glock_nq (2) gfs2 -1 C error 1441 2d11h 1222d 0/29 upstream: reported C repro on 2022/09/23 06:12
linux-5.15 kernel BUG in gfs2_glock_nq origin:upstream -1 C error 1134 1h23m 1051d 0/3 upstream: reported C repro on 2023/03/12 21:28
linux-4.14 kernel BUG at fs/gfs2/glock.c:LINE! -1 3 1826d 1898d 0/1 auto-closed as invalid on 2021/05/27 07:56
▶ ▼ Fix bisection attempts (4)
Created Duration User Patch Repo Result
2026/01/09 20:34 1h25m fix candidate upstream OK (0) job log
2023/12/13 21:00 1h01m bisect fix linux-6.1.y OK (0) job log log
2023/11/06 10:55 1h28m bisect fix linux-6.1.y OK (0) job log log
2023/05/26 21:40 45m bisect fix linux-6.1.y OK (0) job log log

Sample crash report:
gfs2: fsid=syz:syz.0: original: gfs2_quota_sync+0x32c/0x6f0 fs/gfs2/quota.c:1329
gfs2: fsid=syz:syz.0: pid: 4376
gfs2: fsid=syz:syz.0: lock type: 8 req lock state : 1
gfs2: fsid=syz:syz.0: new: gfs2_quota_sync+0x32c/0x6f0 fs/gfs2/quota.c:1329
gfs2: fsid=syz:syz.0: pid: 4376
gfs2: fsid=syz:syz.0: lock type: 8 req lock state : 1
gfs2: fsid=syz:syz.0: G:  s:EX n:8/1 f:qb t:EX d:EX/0 a:0 v:0 r:5 m:20 p:0
gfs2: fsid=syz:syz.0:  H: s:EX f:cH e:0 p:4376 [syz-executor] gfs2_quota_sync+0x32c/0x6f0 fs/gfs2/quota.c:1329
------------[ cut here ]------------
kernel BUG at fs/gfs2/glock.c:1560!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 4376 Comm: syz-executor Not tainted 6.1.148-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:add_to_queue fs/gfs2/glock.c:1560 [inline]
RIP: 0010:gfs2_glock_nq+0x1207/0x14e0 fs/gfs2/glock.c:1585
Code: 9f 7f 45 fe 41 0f b7 0e 48 c7 c7 a0 1a d2 8a 4c 89 fe 89 da e8 da ea 7f 06 31 ff 48 8b 74 24 08 ba 01 00 00 00 e8 c9 7d ff ff <0f> 0b 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 59 ef ff ff 4c 89 ff
RSP: 0018:ffffc90002eb79d8 EFLAGS: 00010246
RAX: efa1336b670dea00 RBX: 0000000000000008 RCX: ffff88807dca3b80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff88805d4862e0 R08: dffffc0000000000 R09: fffffbfff1c3ea96
R10: fffffbfff1c3ea96 R11: 1ffffffff1c3ea95 R12: ffff888028487b18
R13: 0000000000000000 R14: ffff888028487b5a R15: ffff88801ee99270
FS:  0000555563dbc500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555563dd75c8 CR3: 000000007c6c6000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 gfs2_glock_nq_init fs/gfs2/glock.h:255 [inline]
 do_sync+0x3d3/0xc00 fs/gfs2/quota.c:921
 gfs2_quota_sync+0x32c/0x6f0 fs/gfs2/quota.c:1329
 gfs2_sync_fs+0x48/0xb0 fs/gfs2/super.c:660
 sync_filesystem+0xe6/0x220 fs/sync.c:56
 generic_shutdown_super+0x6b/0x340 fs/super.c:474
 kill_block_super+0x7c/0xe0 fs/super.c:1470
 deactivate_locked_super+0x93/0xf0 fs/super.c:332
 cleanup_mnt+0x463/0x4f0 fs/namespace.c:1182
 task_work_run+0x1ca/0x250 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3e2518ff17
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd8cf28988 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f3e25211c05 RCX: 00007f3e2518ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd8cf28a40
RBP: 00007ffd8cf28a40 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd8cf29ad0
R13: 00007f3e25211c05 R14: 000000000001220a R15: 00007ffd8cf29b10
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:add_to_queue fs/gfs2/glock.c:1560 [inline]
RIP: 0010:gfs2_glock_nq+0x1207/0x14e0 fs/gfs2/glock.c:1585
Code: 9f 7f 45 fe 41 0f b7 0e 48 c7 c7 a0 1a d2 8a 4c 89 fe 89 da e8 da ea 7f 06 31 ff 48 8b 74 24 08 ba 01 00 00 00 e8 c9 7d ff ff <0f> 0b 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 59 ef ff ff 4c 89 ff
RSP: 0018:ffffc90002eb79d8 EFLAGS: 00010246
RAX: efa1336b670dea00 RBX: 0000000000000008 RCX: ffff88807dca3b80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff88805d4862e0 R08: dffffc0000000000 R09: fffffbfff1c3ea96
R10: fffffbfff1c3ea96 R11: 1ffffffff1c3ea95 R12: ffff888028487b18
R13: 0000000000000000 R14: ffff888028487b5a R15: ffff88801ee99270
FS:  0000555563dbc500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555563dd75c8 CR3: 000000007c6c6000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (2979):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/08/26 13:20 linux-6.1.y 0bc96de781b4 bf27483f .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2025/02/22 14:15 linux-6.1.y 3a8358583626 d34966d1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2024/04/21 04:38 linux-6.1.y 6741e066ec76 af24b050 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2024/04/10 10:58 linux-6.1.y 347385861c50 171ec371 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2023/03/31 21:13 linux-6.1.y 3b29299e5f60 f325deb0 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/01/25 10:36 linux-6.1.y cd9b81672742 40acda8a .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/23 06:00 linux-6.1.y cd9b81672742 82c9c083 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2025/10/14 23:24 linux-6.1.y 882efbdd9d34 b6605ba8 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2025/06/08 06:00 linux-6.1.y 58485ff1a74f 4826c28e .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2024/02/12 08:56 linux-6.1.y f1bb70486c9c 77b23aa1 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2023/11/13 14:41 linux-6.1.y fb2635ac69ab 6d6dbf8a .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2023/08/01 07:56 linux-6.1.y d2a6dc4eaf6d 2a0d0f29 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2023/03/12 12:19 linux-6.1.y 1cc3fcf63192 5205ef30 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/27 07:38 linux-6.1.y cd9b81672742 efb3e894 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/01/26 22:38 linux-6.1.y cd9b81672742 efb3e894 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/01/26 10:14 linux-6.1.y cd9b81672742 a4c52dd6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/01/26 06:03 linux-6.1.y cd9b81672742 55756628 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/01/25 20:47 linux-6.1.y cd9b81672742 55756628 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/01/25 15:22 linux-6.1.y cd9b81672742 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/01/25 01:08 linux-6.1.y cd9b81672742 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/01/24 10:04 linux-6.1.y cd9b81672742 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/01/23 21:54 linux-6.1.y cd9b81672742 4f25b9b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/01/23 09:56 linux-6.1.y cd9b81672742 e2b1b6e6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/01/23 09:53 linux-6.1.y cd9b81672742 e2b1b6e6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/01/22 16:56 linux-6.1.y cd9b81672742 82c9c083 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/01/22 02:03 linux-6.1.y cd9b81672742 8fc37797 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/01/22 02:03 linux-6.1.y cd9b81672742 8fc37797 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/01/21 16:27 linux-6.1.y cd9b81672742 8fc37797 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/01/21 05:03 linux-6.1.y cd9b81672742 6f1aa2f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/01/27 10:24 linux-6.1.y cd9b81672742 9a514c2f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/26 22:20 linux-6.1.y cd9b81672742 efb3e894 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/26 16:50 linux-6.1.y cd9b81672742 a4c52dd6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/26 10:08 linux-6.1.y cd9b81672742 a4c52dd6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/25 20:45 linux-6.1.y cd9b81672742 55756628 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/25 19:04 linux-6.1.y cd9b81672742 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/25 09:41 linux-6.1.y cd9b81672742 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/25 08:27 linux-6.1.y cd9b81672742 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/24 19:42 linux-6.1.y cd9b81672742 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/24 19:38 linux-6.1.y cd9b81672742 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/24 18:26 linux-6.1.y cd9b81672742 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/24 17:25 linux-6.1.y cd9b81672742 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/24 16:18 linux-6.1.y cd9b81672742 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/24 09:51 linux-6.1.y cd9b81672742 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/24 05:49 linux-6.1.y cd9b81672742 4f25b9b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/24 03:32 linux-6.1.y cd9b81672742 4f25b9b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/23 23:05 linux-6.1.y cd9b81672742 4f25b9b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/23 21:48 linux-6.1.y cd9b81672742 4f25b9b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/23 11:32 linux-6.1.y cd9b81672742 e2b1b6e6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/23 08:47 linux-6.1.y cd9b81672742 82c9c083 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/23 07:05 linux-6.1.y cd9b81672742 82c9c083 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/23 05:33 linux-6.1.y cd9b81672742 82c9c083 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/22 17:45 linux-6.1.y cd9b81672742 82c9c083 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/22 16:47 linux-6.1.y cd9b81672742 82c9c083 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/22 05:34 linux-6.1.y cd9b81672742 a16aed1d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/22 04:34 linux-6.1.y cd9b81672742 a16aed1d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/21 15:27 linux-6.1.y cd9b81672742 6f1aa2f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/21 15:25 linux-6.1.y cd9b81672742 6f1aa2f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/01/21 03:36 linux-6.1.y cd9b81672742 6f1aa2f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2023/03/12 01:30 linux-6.1.y 1cc3fcf63192 5205ef30 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
* Struck through repros no longer work on HEAD.