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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: 1074d, last: 4h10m
▶ ▼ 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 C error 3155 4h33m 1074d 0/3 upstream: reported C repro on 2023/06/04 02:49
linux-6.6 kernel BUG in txUnlock origin:upstream -1 C 1504 3h46m 326d 0/2 upstream: reported C repro on 2025/06/20 22:07
linux-4.19 kernel BUG in txUnlock jfs -1 C error 7 1193d 1235d 0/1 upstream: reported C repro on 2022/12/24 18:38
upstream kernel BUG in txUnlock jfs -1 C error 46288 3h18m 1319d 0/29 upstream: reported C repro on 2022/10/01 14:27
linux-4.14 kernel BUG in txUnlock jfs -1 C 2 1165d 1228d 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 04/18/2026
RIP: 0010:txUnlock+0xc87/0xcb0 fs/jfs/jfs_txnmgr.c:932
Code: ff 4d 2e 07 0f 0b e8 98 05 8e fe 48 c7 c7 00 4a c6 8a 48 c7 c6 f9 45 c6 8a ba a4 03 00 00 48 c7 c1 e0 56 c6 8a e8 d9 4d 2e 07 <0f> 0b e8 72 05 8e fe 48 c7 c7 00 4a c6 8a 48 c7 c6 f9 45 c6 8a ba
RSP: 0018:ffffc90002d67d28 EFLAGS: 00010246
RAX: 0000000000000037 RBX: 0000000000001000 RCX: 3f6b9358c0234000
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc900028ba0d8 R08: ffffc90002d67a27 R09: 1ffff920005acf44
R10: dffffc0000000000 R11: fffff520005acf45 R12: ffff888075f8a9b0
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88802e2ff894
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555818b2a28 CR3: 000000003077d000 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+0x56a/0xa70 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+0xc87/0xcb0 fs/jfs/jfs_txnmgr.c:932
Code: ff 4d 2e 07 0f 0b e8 98 05 8e fe 48 c7 c7 00 4a c6 8a 48 c7 c6 f9 45 c6 8a ba a4 03 00 00 48 c7 c1 e0 56 c6 8a e8 d9 4d 2e 07 <0f> 0b e8 72 05 8e fe 48 c7 c7 00 4a c6 8a 48 c7 c6 f9 45 c6 8a ba
RSP: 0018:ffffc90002d67d28 EFLAGS: 00010246
RAX: 0000000000000037 RBX: 0000000000001000 RCX: 3f6b9358c0234000
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc900028ba0d8 R08: ffffc90002d67a27 R09: 1ffff920005acf44
R10: dffffc0000000000 R11: fffff520005acf45 R12: ffff888075f8a9b0
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88802e2ff894
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f593b98e000 CR3: 000000003077d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (5771):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
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
2026/05/13 09:55 linux-6.1.y ad16b162f21d fec2a7ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/05/13 01:32 linux-6.1.y ad16b162f21d a0949470 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/05/13 01:29 linux-6.1.y ad16b162f21d a0949470 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/05/12 08:41 linux-6.1.y ad16b162f21d 07aeade5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/05/11 20:16 linux-6.1.y ad16b162f21d d168f260 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/05/11 07:45 linux-6.1.y ad16b162f21d 845acb1c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/05/11 07:44 linux-6.1.y ad16b162f21d 845acb1c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/05/09 05:11 linux-6.1.y ad16b162f21d 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/05/08 14:09 linux-6.1.y 128a674368bf b2988c17 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/05/08 14:07 linux-6.1.y 128a674368bf b2988c17 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/05/08 12:46 linux-6.1.y 128a674368bf 5633175a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/05/08 01:25 linux-6.1.y 4931e0e1673d 5633175a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/05/08 01:25 linux-6.1.y 4931e0e1673d 5633175a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/05/07 12:45 linux-6.1.y 4931e0e1673d cbf9e0fc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/05/07 12:43 linux-6.1.y 4931e0e1673d cbf9e0fc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/05/07 00:22 linux-6.1.y 4931e0e1673d f250db59 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/05/06 12:05 linux-6.1.y 4931e0e1673d 1dddfd3d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/05/06 12:05 linux-6.1.y 4931e0e1673d 1dddfd3d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/05/05 22:28 linux-6.1.y 4931e0e1673d 26da2c66 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/05/04 20:36 linux-6.1.y 4931e0e1673d a898ba9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/05/04 08:53 linux-6.1.y 4931e0e1673d 85f1bcf2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/05/02 08:38 linux-6.1.y 4931e0e1673d a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/04/30 21:35 linux-6.1.y 4931e0e1673d a7464baf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/05/12 21:12 linux-6.1.y ad16b162f21d a0949470 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/05/11 23:48 linux-6.1.y ad16b162f21d d168f260 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/05/11 16:19 linux-6.1.y ad16b162f21d 845acb1c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/05/11 09:38 linux-6.1.y ad16b162f21d 845acb1c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/05/11 03:06 linux-6.1.y 128a674368bf 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/05/07 22:28 linux-6.1.y 4931e0e1673d cbf9e0fc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/05/07 19:15 linux-6.1.y 4931e0e1673d cbf9e0fc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/05/06 18:23 linux-6.1.y 4931e0e1673d 1dddfd3d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/05/05 10:02 linux-6.1.y 4931e0e1673d 06e69a27 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/05/05 10:00 linux-6.1.y 4931e0e1673d 06e69a27 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/05/04 19:09 linux-6.1.y 4931e0e1673d 85f1bcf2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/05/04 09:15 linux-6.1.y 4931e0e1673d 85f1bcf2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/05/04 07:26 linux-6.1.y 4931e0e1673d a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/05/03 18:15 linux-6.1.y 4931e0e1673d a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/05/03 13:13 linux-6.1.y 4931e0e1673d a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/05/03 10:43 linux-6.1.y 4931e0e1673d a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/05/02 16:20 linux-6.1.y 4931e0e1673d a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/05/02 08:27 linux-6.1.y 4931e0e1673d a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/05/02 03:54 linux-6.1.y 4931e0e1673d 753c55b9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/05/01 03:00 linux-6.1.y 4931e0e1673d 753c55b9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/05/01 00:46 linux-6.1.y 4931e0e1673d a7464baf .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.