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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: 1004d, last: 4d17h
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 C 1097 1h06m 256d 0/2 upstream: reported C repro on 2025/06/20 22:07
linux-4.19 kernel BUG in txUnlock jfs -1 C error 7 1123d 1165d 0/1 upstream: reported C repro on 2022/12/24 18:38
upstream kernel BUG in txUnlock jfs -1 C error 42085 2h00m 1249d 0/29 upstream: reported C repro on 2022/10/01 14:27
linux-6.1 kernel BUG in txUnlock origin:upstream -1 C 4903 1h03m 1004d 0/3 upstream: reported C repro on 2023/06/04 03:57
linux-4.14 kernel BUG in txUnlock jfs -1 C 2 1095d 1158d 0/1 upstream: reported C repro on 2023/01/01 13:47
▶ ▼ Last patch testing requests (5)
Created Duration User Patch Repo Result
2025/10/08 06:56 13m retest repro linux-5.15.y report log
2025/10/08 06:56 14m retest repro linux-5.15.y report log
2025/10/08 06:56 14m retest repro linux-5.15.y report log
2025/10/08 06:56 16m retest repro linux-5.15.y report log
2025/10/08 06:56 13m retest repro linux-5.15.y report 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: 0 PID: 277 Comm: jfsCommit Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:txUnlock+0xc87/0xcb0 fs/jfs/jfs_txnmgr.c:932
Code: af 8c c9 06 0f 0b e8 b8 e9 a9 fe 48 c7 c7 00 60 42 8a 48 c7 c6 f9 5b 42 8a ba a4 03 00 00 48 c7 c1 c0 6a 42 8a e8 89 8c c9 06 <0f> 0b e8 92 e9 a9 fe 48 c7 c7 00 60 42 8a 48 c7 c6 f9 5b 42 8a ba
RSP: 0018:ffffc90002cffd28 EFLAGS: 00010246
RAX: 0000000000000037 RBX: 0000000000001000 RCX: ee20b88332b8aa00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc900028620d8 R08: dffffc0000000000 R09: fffff5200059ff09
R10: fffff5200059ff09 R11: 1ffff9200059ff08 R12: ffff888079c549b0
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffc90002641110
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff97068f000 CR3: 000000000be8e000 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+0x583/0xb20 fs/jfs/jfs_txnmgr.c:2767
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Modules linked in:
---[ end trace d37354216e3366d7 ]---
RIP: 0010:txUnlock+0xc87/0xcb0 fs/jfs/jfs_txnmgr.c:932
Code: af 8c c9 06 0f 0b e8 b8 e9 a9 fe 48 c7 c7 00 60 42 8a 48 c7 c6 f9 5b 42 8a ba a4 03 00 00 48 c7 c1 c0 6a 42 8a e8 89 8c c9 06 <0f> 0b e8 92 e9 a9 fe 48 c7 c7 00 60 42 8a 48 c7 c6 f9 5b 42 8a ba
RSP: 0018:ffffc90002cffd28 EFLAGS: 00010246
RAX: 0000000000000037 RBX: 0000000000001000 RCX: ee20b88332b8aa00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc900028620d8 R08: dffffc0000000000 R09: fffff5200059ff09
R10: fffff5200059ff09 R11: 1ffff9200059ff08 R12: ffff888079c549b0
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffc90002641110
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff97068f000 CR3: 000000000be8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (2758):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
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
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
2026/02/27 20:31 linux-5.15.y 3330a8d33e08 2cf092b8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/27 15:55 linux-5.15.y 3330a8d33e08 2cf092b8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/27 14:39 linux-5.15.y 3330a8d33e08 a2f13f71 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/27 00:06 linux-5.15.y 3330a8d33e08 a2f13f71 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/26 18:21 linux-5.15.y 3330a8d33e08 ffa54287 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/26 11:48 linux-5.15.y 3330a8d33e08 ffa54287 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/26 11:48 linux-5.15.y 3330a8d33e08 ffa54287 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/26 00:14 linux-5.15.y 3330a8d33e08 e0f78d93 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/25 11:38 linux-5.15.y 3330a8d33e08 94a9671e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/24 23:21 linux-5.15.y 3330a8d33e08 787dfb7c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/24 11:02 linux-5.15.y 3330a8d33e08 96b1aa46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/24 11:00 linux-5.15.y 3330a8d33e08 96b1aa46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/23 22:45 linux-5.15.y 3330a8d33e08 41d2fa6a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/23 11:22 linux-5.15.y 3330a8d33e08 6beca497 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/23 05:52 linux-5.15.y 3330a8d33e08 6e7b5511 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/22 09:22 linux-5.15.y 3330a8d33e08 6e7b5511 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/22 06:54 linux-5.15.y 3330a8d33e08 6e7b5511 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/20 19:03 linux-5.15.y 3330a8d33e08 6e7b5511 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/20 19:01 linux-5.15.y 3330a8d33e08 6e7b5511 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/20 13:08 linux-5.15.y 3330a8d33e08 17d780d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/20 06:55 linux-5.15.y 3330a8d33e08 17d780d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/19 18:43 linux-5.15.y 3330a8d33e08 c8d8c52d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/19 17:15 linux-5.15.y 3330a8d33e08 746545b8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/19 17:15 linux-5.15.y 3330a8d33e08 746545b8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/19 04:42 linux-5.15.y e45d5d41c134 746545b8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/18 16:11 linux-5.15.y e45d5d41c134 77d4d919 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/18 04:26 linux-5.15.y e45d5d41c134 39751c21 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/17 15:53 linux-5.15.y e45d5d41c134 06ec4f7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/17 15:52 linux-5.15.y e45d5d41c134 06ec4f7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/17 03:47 linux-5.15.y e45d5d41c134 e439b951 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/16 15:30 linux-5.15.y e45d5d41c134 5d52cba5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/16 00:19 linux-5.15.y e45d5d41c134 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/15 13:27 linux-5.15.y e45d5d41c134 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/13 22:14 linux-5.15.y e45d5d41c134 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/13 05:39 linux-5.15.y e45d5d41c134 6a673c50 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/13 05:32 linux-5.15.y e45d5d41c134 6a673c50 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/12 16:46 linux-5.15.y e45d5d41c134 504cb1bf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/12 04:51 linux-5.15.y e45d5d41c134 76a109e2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/11 15:53 linux-5.15.y e45d5d41c134 75707236 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/11 15:53 linux-5.15.y e45d5d41c134 75707236 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/11 12:50 linux-5.15.y 7b232985052f 75707236 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/11 00:10 linux-5.15.y 7b232985052f 441e25b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/11 00:08 linux-5.15.y 7b232985052f 441e25b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/10 11:55 linux-5.15.y 7b232985052f 91d776d3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/09 23:54 linux-5.15.y 7b232985052f 4ab09a02 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/09 11:36 linux-5.15.y 7b232985052f df949cd9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in txUnlock
2026/02/08 13:21 linux-5.15.y 7b232985052f 4c131dc4 .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.