syzbot


kernel BUG in __gfs2_glock_put (2)

Status: upstream: reported on 2026/01/04 15:38
Reported-by: syzbot+f67d11b09b95f77dda6c@syzkaller.appspotmail.com
First crash: 12d, last: 15h09m
Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 kernel BUG in __gfs2_glock_put -1 138 103d 198d 0/3 auto-obsoleted due to no activity on 2025/12/15 10:53
upstream kernel BUG in __gfs2_glock_put (2) gfs2 -1 C 502 4d05h 211d 0/29 upstream: reported C repro on 2025/06/20 06:44
upstream kernel BUG in __gfs2_glock_put gfs2 -1 3 690d 693d 0/29 auto-obsoleted due to no activity on 2024/06/06 08:03
linux-6.1 kernel BUG in __gfs2_glock_put (2) -1 18 15h17m 18d 0/3 upstream: reported on 2025/12/30 10:11
linux-6.6 kernel BUG in __gfs2_glock_put -1 219 140d 197d 0/2 auto-obsoleted due to no activity on 2025/11/08 04:20

Sample crash report:
gfs2: fsid=syz:syz.0: G:  s:UN n:2/103e f: t:UN d:EX/0 a:0 v:0 r:-128 m:20 p:1
------------[ cut here ]------------
kernel BUG at fs/gfs2/glock.c:302!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 12707 Comm: kworker/0:1H Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: glock_workqueue glock_work_func
RIP: 0010:__gfs2_glock_put+0x369/0x3c0 fs/gfs2/glock.c:302
Code: 8b 3f 48 89 de e8 07 0f ff ff eb 25 e8 a0 79 de fd e9 cb fe ff ff e8 96 79 de fd 31 ff 48 89 de ba 01 00 00 00 e8 77 de ff ff <0f> 0b e8 80 79 de fd 31 f6 65 ff 0d 1f 2c 5b 7c 40 0f 94 c5 40 0f
RSP: 0018:ffffc900032a7b88 EFLAGS: 00010246
RAX: 34f7058f82a09600 RBX: ffff88802e61f4d0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: fffff52000654f64
RBP: 1ffff11004a1a815 R08: ffffc900032a7427 R09: 0000000000000000
R10: fffff52000654f20 R11: fffff52000654e85 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8880250d4000 R15: ffff88802e61f7c0
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556fc9d9e8 CR3: 0000000031550000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 process_one_work kernel/workqueue.c:2634 [inline]
 process_scheduled_works+0xa5d/0x15d0 kernel/workqueue.c:2711
 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__gfs2_glock_put+0x369/0x3c0 fs/gfs2/glock.c:302
Code: 8b 3f 48 89 de e8 07 0f ff ff eb 25 e8 a0 79 de fd e9 cb fe ff ff e8 96 79 de fd 31 ff 48 89 de ba 01 00 00 00 e8 77 de ff ff <0f> 0b e8 80 79 de fd 31 f6 65 ff 0d 1f 2c 5b 7c 40 0f 94 c5 40 0f
RSP: 0018:ffffc900032a7b88 EFLAGS: 00010246
RAX: 34f7058f82a09600 RBX: ffff88802e61f4d0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: fffff52000654f64
RBP: 1ffff11004a1a815 R08: ffffc900032a7427 R09: 0000000000000000
R10: fffff52000654f20 R11: fffff52000654e85 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8880250d4000 R15: ffff88802e61f7c0
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556fc9d9e8 CR3: 0000000031550000 CR4: 00000000003506f0

Crashes (11):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/16 21:50 linux-6.6.y c596736dadab 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in __gfs2_glock_put
2026/01/16 21:50 linux-6.6.y c596736dadab 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in __gfs2_glock_put
2026/01/16 21:50 linux-6.6.y c596736dadab 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in __gfs2_glock_put
2026/01/16 21:50 linux-6.6.y c596736dadab 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in __gfs2_glock_put
2026/01/16 21:50 linux-6.6.y c596736dadab 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in __gfs2_glock_put
2026/01/11 15:34 linux-6.6.y c596736dadab d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in __gfs2_glock_put
2026/01/11 15:33 linux-6.6.y c596736dadab d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in __gfs2_glock_put
2026/01/11 15:33 linux-6.6.y c596736dadab d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in __gfs2_glock_put
2026/01/11 15:33 linux-6.6.y c596736dadab d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in __gfs2_glock_put
2026/01/05 00:06 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in __gfs2_glock_put
2026/01/04 15:38 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in __gfs2_glock_put
* Struck through repros no longer work on HEAD.