kernel BUG in txUnlock

Status: upstream: reported C repro on 2023/06/04 02:49
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+3c3866c71da45ef61201@syzkaller.appspotmail.com
First crash: 1203d, last: 22d
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Bug presence (1)
Date Name Commit Repro Result
2024/07/29 upstream (ToT) dc1c8034e31b C [report] kernel BUG in txUnlock
▶ ▼ Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.6 kernel BUG in txUnlock origin:upstream -1 syz, C 1594 10d 455d 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 1321d 1364d 0/1 upstream: reported C repro on 2022/12/24 18:38
upstream kernel BUG in txUnlock prio:high jfs -1 syz, C error 49632 5h26m 1448d 0/29 upstream: reported C repro on 2022/10/01 14:27
linux-6.1 kernel BUG in txUnlock origin:upstream -1 syz, C 6959 18h30m 1202d 0/3 upstream: reported C repro on 2023/06/04 03:57
linux-4.14 kernel BUG in txUnlock jfs -1 syz, C 2 1294d 1356d 0/1 upstream: reported C repro on 2023/01/01 13:47
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/03/14 05:28 13m retest repro linux-5.15.y error
2026/03/14 05:28 14m retest repro linux-5.15.y error
2026/03/14 05:28 14m retest repro linux-5.15.y error
2026/03/14 05:28 14m retest repro linux-5.15.y error
2026/03/14 05:28 7m retest repro linux-5.15.y error
2026/03/14 00:35 11m retest repro linux-5.15.y error
2026/03/13 22:48 11m retest repro linux-5.15.y error
2026/03/13 22:48 9m retest repro linux-5.15.y error
2026/03/13 22:48 24m retest repro linux-5.15.y error
2026/03/13 22:48 26m retest repro linux-5.15.y error

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: 0 PID: 277 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: c9 80 e2 06 0f 0b e8 42 0b a6 fe 48 c7 c7 40 52 62 8a 48 c7 c6 29 4e 62 8a ba a4 03 00 00 48 c7 c1 00 5d 62 8a e8 a3 80 e2 06 <0f> 0b e8 1c 0b a6 fe 48 c7 c7 40 52 62 8a 48 c7 c6 29 4e 62 8a ba
RSP: 0018:ffffc90002d3fd30 EFLAGS: 00010246
RAX: 0000000000000037 RBX: 0000000000000000 RCX: fd8f7d2765cb0200
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffff8880221d09b0 R08: ffff8880b902795b R09: 1ffff11017204f2b
R10: dffffc0000000000 R11: ffffed1017204f2c R12: ffffc900028920d8
R13: dffffc0000000000 R14: 000000000000001b R15: ffff8880255f0294
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000003421f00 CR3: 0000000020e3e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 txLazyCommit fs/jfs/jfs_txnmgr.c:2717 [inline]
 jfs_lazycommit+0x598/0xb60 fs/jfs/jfs_txnmgr.c:2767
 kthread+0x42e/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Modules linked in:
---[ end trace 4fe71ad626e607f1 ]---
RIP: 0010:txUnlock+0xc7d/0xcb0 fs/jfs/jfs_txnmgr.c:932
Code: c9 80 e2 06 0f 0b e8 42 0b a6 fe 48 c7 c7 40 52 62 8a 48 c7 c6 29 4e 62 8a ba a4 03 00 00 48 c7 c1 00 5d 62 8a e8 a3 80 e2 06 <0f> 0b e8 1c 0b a6 fe 48 c7 c7 40 52 62 8a 48 c7 c6 29 4e 62 8a ba
RSP: 0018:ffffc90002d3fd30 EFLAGS: 00010246
RAX: 0000000000000037 RBX: 0000000000000000 RCX: fd8f7d2765cb0200
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffff8880221d09b0 R08: ffff8880b902795b R09: 1ffff11017204f2b
R10: dffffc0000000000 R11: ffffed1017204f2c R12: ffffc900028920d8
R13: dffffc0000000000 R14: 000000000000001b R15: ffff8880255f0294
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2e1baa2000 CR3: 000000002a946000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (3900):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/14 03:20 linux-5.15.y aabd761612db b13552fe .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/07/16 10:51 linux-5.15.y c86c4726e7f0 27a8bd60 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/04/06 22:59 linux-5.15.y 91d48252ad4b 4440e7c2 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan kernel BUG in txUnlock
2025/12/18 06:59 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan kernel BUG in txUnlock
2025/09/08 08:23 linux-5.15.y 7a6c2d093c45 d291dd2d .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan kernel BUG in txUnlock
2024/11/07 07:18 linux-5.15.y 72244eab0dad df3dc63b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in txUnlock
2024/07/28 18:22 linux-5.15.y 7e89efd3ae1c 46eb10b7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in txUnlock
2023/06/24 22:30 linux-5.15.y f67653019430 79782afc .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in txUnlock
2025/08/06 06:32 linux-5.15.y c79648372d02 ffe1dd46 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan-arm64 kernel BUG in txUnlock
2025/07/02 12:59 linux-5.15.y 3dea0e7f549e bc80e4f0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan-arm64 kernel BUG in txUnlock
2025/03/23 21:50 linux-5.15.y 0c935c049b5c 4e8d3850 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan-arm64 kernel BUG in txUnlock
2025/01/21 08:29 linux-5.15.y 4735586da88e 6e87cfa2 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 kernel BUG in txUnlock
2024/04/15 23:23 linux-5.15.y fa3df276cd36 b9af7e61 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 kernel BUG in txUnlock
2023/06/04 03:22 linux-5.15.y 0ab06468cbd1 a4ae4f42 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 kernel BUG in txUnlock
2026/08/28 01:18 linux-5.15.y 4a1eaf96ee5c 69a01293 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/18 00:47 linux-5.15.y aabd761612db 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/17 15:16 linux-5.15.y aabd761612db 905244d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/17 12:10 linux-5.15.y aabd761612db 905244d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/17 04:52 linux-5.15.y aabd761612db 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/17 03:18 linux-5.15.y aabd761612db 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/16 18:53 linux-5.15.y aabd761612db 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/16 14:52 linux-5.15.y aabd761612db 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/15 01:03 linux-5.15.y aabd761612db 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/15 00:59 linux-5.15.y aabd761612db 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/14 12:23 linux-5.15.y aabd761612db 6f9b3e89 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/13 19:15 linux-5.15.y aabd761612db b13552fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/13 19:06 linux-5.15.y aabd761612db b13552fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/12 19:36 linux-5.15.y aabd761612db 359b2492 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/12 03:28 linux-5.15.y aabd761612db f8d35649 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/12 02:58 linux-5.15.y aabd761612db f8d35649 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/11 14:17 linux-5.15.y aabd761612db 71790083 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/10 20:39 linux-5.15.y aabd761612db 508909ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/10 20:32 linux-5.15.y aabd761612db 508909ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/08 05:26 linux-5.15.y aabd761612db 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/07 16:32 linux-5.15.y aabd761612db e4ef95d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/07 11:30 linux-5.15.y aabd761612db e4ef95d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/07 08:29 linux-5.15.y aabd761612db c38879ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/06 19:15 linux-5.15.y 9c7634c60784 c38879ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/06 15:34 linux-5.15.y 6e2fd6534337 c38879ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/05 20:15 linux-5.15.y 6e2fd6534337 cd5b1963 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/05 03:55 linux-5.15.y 6e2fd6534337 52aa2820 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/05 03:55 linux-5.15.y 6e2fd6534337 52aa2820 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/04 14:31 linux-5.15.y 6e2fd6534337 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/03 23:59 linux-5.15.y 6e2fd6534337 9451e17e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/03 12:05 linux-5.15.y 6e2fd6534337 6b7c9f71 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/02 20:53 linux-5.15.y 6e2fd6534337 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/02 02:30 linux-5.15.y 6e2fd6534337 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/08/01 03:47 linux-5.15.y 6e2fd6534337 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/07/31 14:11 linux-5.15.y 6e2fd6534337 7664cf44 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/07/30 19:00 linux-5.15.y 6e2fd6534337 aaffb173 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/07/30 13:29 linux-5.15.y 6e2fd6534337 2377cd3d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/07/30 08:25 linux-5.15.y 674f684f7c61 2377cd3d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/07/30 08:25 linux-5.15.y 674f684f7c61 2377cd3d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/07/29 15:52 linux-5.15.y 674f684f7c61 6ef5c1e2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/07/29 03:01 linux-5.15.y 674f684f7c61 19622d9d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/07/28 14:47 linux-5.15.y 674f684f7c61 edc8a875 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/07/28 14:47 linux-5.15.y 674f684f7c61 edc8a875 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/07/28 02:29 linux-5.15.y 674f684f7c61 45ae1df4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/07/27 12:44 linux-5.15.y 674f684f7c61 aae9036b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/07/27 12:44 linux-5.15.y 674f684f7c61 aae9036b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/07/25 02:33 linux-5.15.y 674f684f7c61 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/07/24 16:21 linux-5.15.y 674f684f7c61 dd737a83 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/07/24 13:41 linux-5.15.y c86c4726e7f0 dd737a83 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/07/24 04:16 linux-5.15.y c86c4726e7f0 544adce9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2025/08/27 18:36 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in txUnlock
2023/06/04 02:49 linux-5.15.y 0ab06468cbd1 a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in txUnlock
* Struck through repros no longer work on HEAD.