syzbot

 sign-in | mailing list | source | docs
🐞 Open [895]
🐞 Fixed [141]
🐞 Invalid [1038]
⬇ Missing Backports [73]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

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: 1101d, last: 6h38m
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 1519d 1563d 0/1 auto-closed as invalid on 2022/05/17 22:53
linux-4.19 kernel BUG in gfs2_glock_nq -1 1 1799d 1799d 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 1106d 1645d 0/1 upstream: reported C repro on 2021/09/14 01:12
upstream kernel BUG in gfs2_glock_nq gfs2 -1 2 1574d 1564d 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 773 6d06h 267d 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 1110d 1390d 0/1 upstream: reported C repro on 2022/05/26 14:43
upstream kernel BUG in gfs2_glock_nq (2) gfs2 -1 C error 1447 5d04h 1271d 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 1449 9d22h 1100d 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 1875d 1947d 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 (4286):
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
2026/03/07 09:57 linux-6.1.y f2ddafa93a25 5cb44a80 .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
2026/02/09 18:42 linux-6.1.y 0182cb5b74ee df949cd9 .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
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
2026/03/17 07:56 linux-6.1.y f2ddafa93a25 c01bca74 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/17 07:56 linux-6.1.y f2ddafa93a25 c01bca74 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/17 06:55 linux-6.1.y f2ddafa93a25 0737c18f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/16 19:56 linux-6.1.y f2ddafa93a25 0737c18f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/16 19:50 linux-6.1.y f2ddafa93a25 0737c18f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/12 10:37 linux-6.1.y f2ddafa93a25 4efadf07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/12 10:33 linux-6.1.y f2ddafa93a25 4efadf07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/11 17:20 linux-6.1.y f2ddafa93a25 2d88ab01 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/11 17:15 linux-6.1.y f2ddafa93a25 2d88ab01 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/11 14:04 linux-6.1.y f2ddafa93a25 2d88ab01 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/11 14:01 linux-6.1.y f2ddafa93a25 2d88ab01 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/11 01:51 linux-6.1.y f2ddafa93a25 86914af9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/11 01:47 linux-6.1.y f2ddafa93a25 86914af9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/10 13:56 linux-6.1.y f2ddafa93a25 4683d576 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/10 12:58 linux-6.1.y f2ddafa93a25 6972f302 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/10 01:37 linux-6.1.y f2ddafa93a25 6972f302 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/10 01:37 linux-6.1.y f2ddafa93a25 6972f302 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/09 13:16 linux-6.1.y f2ddafa93a25 176bead5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/09 13:13 linux-6.1.y f2ddafa93a25 176bead5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/07 00:22 linux-6.1.y f2ddafa93a25 5cb44a80 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/07 00:20 linux-6.1.y f2ddafa93a25 5cb44a80 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/06 12:09 linux-6.1.y f2ddafa93a25 41d8037d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/06 00:07 linux-6.1.y f2ddafa93a25 31e9c887 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/05 16:36 linux-6.1.y f2ddafa93a25 d20b04c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/05 11:46 linux-6.1.y 2f66dd9cff42 d20b04c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/05 11:43 linux-6.1.y 2f66dd9cff42 d20b04c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/04 23:40 linux-6.1.y 2f66dd9cff42 a9fe5c9e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/04 14:27 linux-6.1.y 2f66dd9cff42 e6b6b96b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/04 11:40 linux-6.1.y 779f9571ac3e e6b6b96b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/04 11:40 linux-6.1.y 779f9571ac3e e6b6b96b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/03 13:18 linux-6.1.y 779f9571ac3e 4180d919 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/03 13:18 linux-6.1.y 779f9571ac3e 4180d919 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/03 00:38 linux-6.1.y 779f9571ac3e 28b83e23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in gfs2_glock_nq
2026/03/17 03:07 linux-6.1.y f2ddafa93a25 0737c18f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/03/17 01:21 linux-6.1.y f2ddafa93a25 0737c18f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/03/12 00:01 linux-6.1.y f2ddafa93a25 2d88ab01 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/03/11 10:53 linux-6.1.y f2ddafa93a25 86914af9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/03/10 08:27 linux-6.1.y f2ddafa93a25 6972f302 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/03/09 19:36 linux-6.1.y f2ddafa93a25 176bead5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/03/07 16:17 linux-6.1.y f2ddafa93a25 5cb44a80 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/03/04 21:58 linux-6.1.y 2f66dd9cff42 e6b6b96b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/03/02 18:49 linux-6.1.y 779f9571ac3e b9dd6534 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in gfs2_glock_nq
2026/03/02 18:47 linux-6.1.y 779f9571ac3e b9dd6534 .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.