kernel BUG in txUnlock

Status: upstream: reported C repro on 2025/06/20 22:07
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+4d1764d69ed762160c10@syzkaller.appspotmail.com
First crash: 407d, last: 18d
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2025/06/25 upstream (ToT) c4dce0c094a8 C [report] kernel BUG in txUnlock
2026/07/18 upstream (ToT) 1229e2e57a5c C Failed due to an error; will retry later
▶ ▼ Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 kernel BUG in txUnlock origin:upstream -1 syz, C error 3760 3h01m 1155d 0/3 upstream: reported C repro on 2023/06/04 02:49
linux-4.19 kernel BUG in txUnlock jfs -1 syz, C error 7 1273d 1316d 0/1 upstream: reported C repro on 2022/12/24 18:38
upstream kernel BUG in txUnlock prio:high jfs -1 syz, C error 48553 3h43m 1400d 0/29 upstream: reported C repro on 2022/10/01 14:27
linux-6.1 kernel BUG in txUnlock origin:upstream -1 syz, C 6693 10d 1155d 0/3 upstream: reported C repro on 2023/06/04 03:57
linux-4.14 kernel BUG in txUnlock jfs -1 syz, C 2 1246d 1308d 0/1 upstream: reported C repro on 2023/01/01 13:47

Sample crash report:
BUG at fs/jfs/jfs_txnmgr.c:932 assert(mp->nohomeok > 0)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_txnmgr.c:932!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 114 Comm: jfsCommit Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
RIP: 0010:txUnlock+0xc7d/0xcb0 fs/jfs/jfs_txnmgr.c:932
Code: 69 d7 78 07 0f 0b e8 52 79 7f fe 48 c7 c7 c0 0c 04 8b 48 c7 c6 b9 08 04 8b ba a4 03 00 00 48 c7 c1 a0 19 04 8b e8 43 d7 78 07 <0f> 0b e8 2c 79 7f fe 48 c7 c7 c0 0c 04 8b 48 c7 c6 b9 08 04 8b ba
RSP: 0018:ffffc90002cd7d10 EFLAGS: 00010246
RAX: 0000000000000037 RBX: 0000000000000000 RCX: eced6f79ea941f00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffff888072110d90 R08: ffffc90002cd7a07 R09: 1ffff9200059af40
R10: dffffc0000000000 R11: fffff5200059af41 R12: ffffc9000284a048
R13: dffffc0000000000 R14: 0000000000000009 R15: ffff88807c6c7a94
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000cc9bc429000 CR3: 0000000071b84000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 txLazyCommit fs/jfs/jfs_txnmgr.c:2683 [inline]
 jfs_lazycommit+0x58c/0xaa0 fs/jfs/jfs_txnmgr.c:2733
 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:txUnlock+0xc7d/0xcb0 fs/jfs/jfs_txnmgr.c:932
Code: 69 d7 78 07 0f 0b e8 52 79 7f fe 48 c7 c7 c0 0c 04 8b 48 c7 c6 b9 08 04 8b ba a4 03 00 00 48 c7 c1 a0 19 04 8b e8 43 d7 78 07 <0f> 0b e8 2c 79 7f fe 48 c7 c7 c0 0c 04 8b 48 c7 c6 b9 08 04 8b ba
RSP: 0018:ffffc90002cd7d10 EFLAGS: 00010246
RAX: 0000000000000037 RBX: 0000000000000000 RCX: eced6f79ea941f00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffff888072110d90 R08: ffffc90002cd7a07 R09: 1ffff9200059af40
R10: dffffc0000000000 R11: fffff5200059af41 R12: ffffc9000284a048
R13: dffffc0000000000 R14: 0000000000000009 R15: ffff88807c6c7a94
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000cc9bc429000 CR3: 00000000308bc000 CR4: 00000000003506e0

Crashes (1593):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/07/14 18:17 linux-6.6.y da47cbc25466 2130f682 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/03/30 07:05 linux-6.6.y c09fbcd31ae6 b5ceaad2 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/01/09 11:29 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-6-kasan kernel BUG in txUnlock
2025/06/21 22:14 linux-6.6.y 6282921b6825 d6cdfb8a .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/07/14 14:19 linux-6.6.y da47cbc25466 2130f682 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/06/17 16:01 linux-6.6.y 924b4a879cbb b62b3ded .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/06/17 05:09 linux-6.6.y 924b4a879cbb 62cc6db3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/06/16 12:09 linux-6.6.y 924b4a879cbb a3998659 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/06/16 00:21 linux-6.6.y 924b4a879cbb 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/21 17:35 linux-6.6.y eac8889a3a1c e195359d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/21 01:03 linux-6.6.y eac8889a3a1c 41b8c833 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/21 01:03 linux-6.6.y eac8889a3a1c 41b8c833 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/20 12:26 linux-6.6.y eac8889a3a1c 62fb93a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/19 23:48 linux-6.6.y eac8889a3a1c 0909d65f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/19 20:33 linux-6.6.y eac8889a3a1c 223544dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/19 11:45 linux-6.6.y eac8889a3a1c 223544dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/18 22:57 linux-6.6.y eac8889a3a1c 9f74d399 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/18 22:54 linux-6.6.y eac8889a3a1c 9f74d399 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/18 10:26 linux-6.6.y eac8889a3a1c 55156e84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/17 16:49 linux-6.6.y eac8889a3a1c de5aae85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/16 21:47 linux-6.6.y 4d922539ad7d de5aae85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/16 09:46 linux-6.6.y 4d922539ad7d a15a64a6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/16 09:46 linux-6.6.y 4d922539ad7d a15a64a6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/15 22:14 linux-6.6.y 4d922539ad7d 81fb92f3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/15 14:37 linux-6.6.y 4d922539ad7d 9cd3beaa .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/13 22:19 linux-6.6.y 3b9f64db0496 6ccb967e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/13 10:19 linux-6.6.y 3b9f64db0496 fec2a7ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/13 10:18 linux-6.6.y 3b9f64db0496 fec2a7ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/12 21:11 linux-6.6.y 3b9f64db0496 a0949470 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/12 14:11 linux-6.6.y 3b9f64db0496 07aeade5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/12 00:37 linux-6.6.y 3b9f64db0496 d168f260 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/11 07:38 linux-6.6.y 3b9f64db0496 845acb1c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/11 05:41 linux-6.6.y 3b9f64db0496 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/09 02:28 linux-6.6.y 3b9f64db0496 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/09 02:25 linux-6.6.y 3b9f64db0496 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/08 14:48 linux-6.6.y 3b9f64db0496 b2988c17 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/08 09:19 linux-6.6.y 3b9f64db0496 5633175a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/08 02:00 linux-6.6.y 258cf62a6dfd 5633175a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/07 13:47 linux-6.6.y 258cf62a6dfd cbf9e0fc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/07 13:47 linux-6.6.y 258cf62a6dfd cbf9e0fc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/07 01:15 linux-6.6.y 258cf62a6dfd f250db59 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/06 12:56 linux-6.6.y 258cf62a6dfd 1dddfd3d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/05 23:02 linux-6.6.y 258cf62a6dfd 26da2c66 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/05 10:05 linux-6.6.y 258cf62a6dfd 06e69a27 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/04 20:53 linux-6.6.y 258cf62a6dfd a898ba9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/04 09:10 linux-6.6.y 258cf62a6dfd 85f1bcf2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2026/05/03 11:46 linux-6.6.y 258cf62a6dfd a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
2025/06/20 22:07 linux-6.6.y 6282921b6825 804b3919 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in txUnlock
* Struck through repros no longer work on HEAD.