kernel BUG in txUnlock

Status: upstream: reported C repro on 2023/06/04 03:57
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+d1ae34d83d7e0bb72ed8@syzkaller.appspotmail.com
First crash: 1216d, last: 1d08h
▶ ▼ Bug presence (1)
Date Name Commit Repro Result
2023/11/15 upstream (ToT) 9bacdd8996c7 C [report] kernel BUG in txUnlock
▶ ▼ 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 3916 7h18m 1216d 0/3 upstream: reported C repro on 2023/06/04 02:49
linux-6.6 kernel BUG in txUnlock origin:upstream -1 syz, C 1595 11d 469d 0/2 upstream: reported C repro on 2025/06/20 22:07
linux-4.19 kernel BUG in txUnlock jfs -1 syz, C error 7 1335d 1378d 0/1 upstream: reported C repro on 2022/12/24 18:38
upstream kernel BUG in txUnlock prio:high jfs -1 syz, C error 49783 4h25m 1462d 0/29 upstream: reported C repro on 2022/10/01 14:27
linux-4.14 kernel BUG in txUnlock jfs -1 syz, C 2 1308d 1370d 0/1 upstream: reported C repro on 2023/01/01 13:47
▶ ▼ Fix bisection attempts (6)
Created Duration User Patch Repo Result
2024/03/16 11:16 1h24m bisect fix linux-6.1.y OK (0) job log log
2024/02/11 00:26 1h44m bisect fix linux-6.1.y OK (0) job log log
2024/01/05 00:05 1h08m bisect fix linux-6.1.y OK (0) job log log
2023/11/15 01:13 1h15m bisect fix linux-6.1.y OK (0) job log log
2023/10/13 14:59 2h11m bisect fix linux-6.1.y OK (0) job log log
2023/07/08 01:10 2h17m bisect fix linux-6.1.y OK (0) job log log

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: 107 Comm: jfsCommit Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:txUnlock+0xc7d/0xcb0 fs/jfs/jfs_txnmgr.c:932
Code: 99 a6 31 07 0f 0b e8 32 d2 8d fe 48 c7 c7 00 37 c6 8a 48 c7 c6 e9 32 c6 8a ba a4 03 00 00 48 c7 c1 e0 43 c6 8a e8 73 a6 31 07 <0f> 0b e8 0c d2 8d fe 48 c7 c7 00 37 c6 8a 48 c7 c6 e9 32 c6 8a ba
RSP: 0018:ffffc90002607d30 EFLAGS: 00010246
RAX: 0000000000000037 RBX: 0000000000000000 RCX: ed5cefcd884feb00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffff888027138d90 R08: ffffc90002607a27 R09: 1ffff920004c0f44
R10: dffffc0000000000 R11: fffff520004c0f45 R12: ffffc900028ca168
R13: dffffc0000000000 R14: 000000000000002d R15: ffff88802ef2d094
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efc04f67000 CR3: 000000002e79d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 txLazyCommit fs/jfs/jfs_txnmgr.c:2683 [inline]
 jfs_lazycommit+0x588/0xa90 fs/jfs/jfs_txnmgr.c:2733
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:txUnlock+0xc7d/0xcb0 fs/jfs/jfs_txnmgr.c:932
Code: 99 a6 31 07 0f 0b e8 32 d2 8d fe 48 c7 c7 00 37 c6 8a 48 c7 c6 e9 32 c6 8a ba a4 03 00 00 48 c7 c1 e0 43 c6 8a e8 73 a6 31 07 <0f> 0b e8 0c d2 8d fe 48 c7 c7 00 37 c6 8a 48 c7 c6 e9 32 c6 8a ba
RSP: 0018:ffffc90002607d30 EFLAGS: 00010246
RAX: 0000000000000037 RBX: 0000000000000000 RCX: ed5cefcd884feb00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffff888027138d90 R08: ffffc90002607a27 R09: 1ffff920004c0f44
R10: dffffc0000000000 R11: fffff520004c0f45 R12: ffffc900028ca168
R13: dffffc0000000000 R14: 000000000000002d R15: ffff88802ef2d094
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efc04f67000 CR3: 000000002e79d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (7029):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/10 23:48 linux-6.1.y cf82dcca9634 1fe56c0a .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 txUnlock
2026/08/08 18:23 linux-6.1.y e4f7d8be268e 5d63f80b .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 txUnlock
2026/04/29 07:35 linux-6.1.y 7c87defbd336 95008c03 .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 txUnlock
2026/03/10 00:39 linux-6.1.y f2ddafa93a25 176bead5 .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 txUnlock
2024/03/17 17:29 linux-6.1.y d7543167affd d615901c .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan kernel BUG in txUnlock
2023/07/23 05:58 linux-6.1.y a456e1743881 27cbe77f .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/08/24 03:18 linux-6.1.y 05208478041c 1e72964b .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 txUnlock
2025/11/27 11:34 linux-6.1.y f6e38ae624cf d6526ea3 .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 txUnlock
2025/08/06 13:07 linux-6.1.y 3594f306da12 ffe1dd46 .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 txUnlock
2025/08/05 21:19 linux-6.1.y 3594f306da12 37880f40 .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 txUnlock
2025/05/28 04:48 linux-6.1.y da3c5173c55f 874a1386 .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 txUnlock
2025/02/17 00:04 linux-6.1.y 0cbb5f65e52f 40a34ec9 .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 txUnlock
2024/12/22 05:35 linux-6.1.y 29f02ec58a94 d7f584ee .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2024/12/17 17:20 linux-6.1.y 52f863f820fd f93b2b55 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2024/05/28 15:16 linux-6.1.y 88690811da69 f550015e .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2023/06/04 03:57 linux-6.1.y d2869ace6eeb a4ae4f42 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/10/01 04:23 linux-6.1.y 1a8763b93150 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/09/14 19:22 linux-6.1.y 1a8763b93150 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/09/12 02:02 linux-6.1.y cf82dcca9634 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/10/01 18:40 linux-6.1.y 1a8763b93150 f5cdae2f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/10/01 14:05 linux-6.1.y 1a8763b93150 f5cdae2f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/30 18:49 linux-6.1.y 1a8763b93150 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/30 18:49 linux-6.1.y 1a8763b93150 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/30 07:19 linux-6.1.y 1a8763b93150 7808aef4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/29 18:06 linux-6.1.y 1a8763b93150 328436b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/29 11:50 linux-6.1.y 1a8763b93150 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/29 02:23 linux-6.1.y 1a8763b93150 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/28 02:24 linux-6.1.y 1a8763b93150 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/27 18:59 linux-6.1.y 1a8763b93150 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/27 12:23 linux-6.1.y 1a8763b93150 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/26 03:47 linux-6.1.y 1a8763b93150 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/25 03:44 linux-6.1.y 1a8763b93150 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/24 15:31 linux-6.1.y 1a8763b93150 3c3cdf19 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/24 03:21 linux-6.1.y 1a8763b93150 0281b448 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/23 23:39 linux-6.1.y 1a8763b93150 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/23 22:19 linux-6.1.y 1a8763b93150 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/23 11:40 linux-6.1.y 1a8763b93150 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/22 21:03 linux-6.1.y 1a8763b93150 5207b90e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/22 05:47 linux-6.1.y 1a8763b93150 e12281bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/22 00:31 linux-6.1.y 1a8763b93150 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/21 19:45 linux-6.1.y 1a8763b93150 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/20 22:20 linux-6.1.y 1a8763b93150 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/20 12:40 linux-6.1.y 1a8763b93150 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/19 23:36 linux-6.1.y 1a8763b93150 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/19 05:12 linux-6.1.y 1a8763b93150 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/18 08:33 linux-6.1.y 1a8763b93150 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/17 17:49 linux-6.1.y 1a8763b93150 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/17 00:35 linux-6.1.y 1a8763b93150 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/16 05:26 linux-6.1.y 1a8763b93150 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/16 05:24 linux-6.1.y 1a8763b93150 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/15 15:15 linux-6.1.y 1a8763b93150 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/15 09:23 linux-6.1.y 1a8763b93150 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/14 14:25 linux-6.1.y 1a8763b93150 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/14 11:51 linux-6.1.y cf82dcca9634 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/14 10:08 linux-6.1.y cf82dcca9634 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/13 21:40 linux-6.1.y cf82dcca9634 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/13 00:30 linux-6.1.y cf82dcca9634 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/12 16:39 linux-6.1.y cf82dcca9634 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/11 12:18 linux-6.1.y cf82dcca9634 b6a5eeb7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/11 07:47 linux-6.1.y cf82dcca9634 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/11 06:00 linux-6.1.y cf82dcca9634 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/09/10 11:41 linux-6.1.y cf82dcca9634 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
* Struck through repros no longer work on HEAD.