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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: 1014d, last: 1d18h
▶ ▼ 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 2758 14d 1014d 0/3 upstream: reported C repro on 2023/06/04 02:49
linux-6.6 kernel BUG in txUnlock origin:upstream -1 C 1138 4d14h 266d 0/2 upstream: reported C repro on 2025/06/20 22:07
linux-4.19 kernel BUG in txUnlock jfs -1 C error 7 1132d 1175d 0/1 upstream: reported C repro on 2022/12/24 18:38
upstream kernel BUG in txUnlock jfs -1 C error 42824 1h45m 1259d 0/29 upstream: reported C repro on 2022/10/01 14:27
linux-4.14 kernel BUG in txUnlock jfs -1 C 2 1105d 1167d 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: 0 PID: 108 Comm: jfsCommit Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:txUnlock+0xc87/0xcb0 fs/jfs/jfs_txnmgr.c:932
Code: cf 83 2d 07 0f 0b e8 c8 28 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 a9 83 2d 07 <0f> 0b e8 a2 28 8e fe 48 c7 c7 00 4a c6 8a 48 c7 c6 f9 45 c6 8a ba
RSP: 0018:ffffc90002d07d28 EFLAGS: 00010246
RAX: 0000000000000037 RBX: 0000000000001000 RCX: c7167d03135daf00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc9000287a0d8 R08: ffffc90002d07a27 R09: 1ffff920005a0f44
R10: dffffc0000000000 R11: fffff520005a0f45 R12: ffff8880276659b0
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88802f15d694
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000035e43fee4000 CR3: 000000007e264000 CR4: 00000000003506f0
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: cf 83 2d 07 0f 0b e8 c8 28 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 a9 83 2d 07 <0f> 0b e8 a2 28 8e fe 48 c7 c7 00 4a c6 8a 48 c7 c6 f9 45 c6 8a ba
RSP: 0018:ffffc90002d07d28 EFLAGS: 00010246
RAX: 0000000000000037 RBX: 0000000000001000 RCX: c7167d03135daf00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc9000287a0d8 R08: ffffc90002d07a27 R09: 1ffff920005a0f44
R10: dffffc0000000000 R11: fffff520005a0f45 R12: ffff8880276659b0
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88802f15d694
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000035e43fee4000 CR3: 000000007e629000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (4979):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
2026/03/12 11:32 linux-6.1.y f2ddafa93a25 4efadf07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/11 18:36 linux-6.1.y f2ddafa93a25 2d88ab01 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/11 14:53 linux-6.1.y f2ddafa93a25 2d88ab01 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/11 02:54 linux-6.1.y f2ddafa93a25 86914af9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/11 02:45 linux-6.1.y f2ddafa93a25 86914af9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/10 15:00 linux-6.1.y f2ddafa93a25 4683d576 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/10 02:52 linux-6.1.y f2ddafa93a25 6972f302 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/09 14:50 linux-6.1.y f2ddafa93a25 176bead5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/07 01:01 linux-6.1.y f2ddafa93a25 5cb44a80 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/06 13:01 linux-6.1.y f2ddafa93a25 41d8037d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/06 01:02 linux-6.1.y f2ddafa93a25 31e9c887 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/05 17:28 linux-6.1.y f2ddafa93a25 d20b04c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/05 12:27 linux-6.1.y 2f66dd9cff42 d20b04c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/05 00:50 linux-6.1.y 2f66dd9cff42 a9fe5c9e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/04 15:17 linux-6.1.y 2f66dd9cff42 e6b6b96b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/04 12:47 linux-6.1.y 779f9571ac3e e6b6b96b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/04 12:46 linux-6.1.y 779f9571ac3e e6b6b96b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/03 14:20 linux-6.1.y 779f9571ac3e 4180d919 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/03 01:37 linux-6.1.y 779f9571ac3e 28b83e23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/02 13:39 linux-6.1.y 779f9571ac3e b9dd6534 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/02 11:47 linux-6.1.y 779f9571ac3e 43249bac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/02 00:21 linux-6.1.y 779f9571ac3e 43249bac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/02 00:21 linux-6.1.y 779f9571ac3e 43249bac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/02/28 04:12 linux-6.1.y 779f9571ac3e 43249bac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/02/27 22:22 linux-6.1.y 779f9571ac3e 2cf092b8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/02/27 22:08 linux-6.1.y 779f9571ac3e 2cf092b8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/02/27 15:48 linux-6.1.y 779f9571ac3e 2cf092b8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/02/27 00:55 linux-6.1.y 779f9571ac3e a2f13f71 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/02/27 00:52 linux-6.1.y 779f9571ac3e a2f13f71 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/02/26 12:14 linux-6.1.y 779f9571ac3e ffa54287 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/02/26 00:12 linux-6.1.y 779f9571ac3e e0f78d93 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/02/25 11:51 linux-6.1.y 779f9571ac3e 94a9671e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/02/24 23:48 linux-6.1.y 779f9571ac3e 787dfb7c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/02/24 11:21 linux-6.1.y 779f9571ac3e 96b1aa46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/02/23 23:33 linux-6.1.y 779f9571ac3e 41d2fa6a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/02/23 11:09 linux-6.1.y 779f9571ac3e 6beca497 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/02/23 11:03 linux-6.1.y 779f9571ac3e 6beca497 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/02/20 19:25 linux-6.1.y 779f9571ac3e 6e7b5511 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/02/20 17:09 linux-6.1.y 779f9571ac3e 17d780d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/02/23 04:23 linux-6.1.y 779f9571ac3e 6e7b5511 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/02/23 00:33 linux-6.1.y 779f9571ac3e 6e7b5511 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/02/19 17:02 linux-6.1.y 779f9571ac3e 746545b8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/02/19 17:02 linux-6.1.y 779f9571ac3e 746545b8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/02/19 12:47 linux-6.1.y 8ce36b2849ef 746545b8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/02/19 04:25 linux-6.1.y 8ce36b2849ef 746545b8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/02/18 16:11 linux-6.1.y 8ce36b2849ef 77d4d919 .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.