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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: 1039d, last: 3h12m
▶ ▼ 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 2883 2h11m 1039d 0/3 upstream: reported C repro on 2023/06/04 02:49
linux-6.6 kernel BUG in txUnlock origin:upstream -1 C 1213 4h26m 291d 0/2 upstream: reported C repro on 2025/06/20 22:07
linux-4.19 kernel BUG in txUnlock jfs -1 C error 7 1157d 1200d 0/1 upstream: reported C repro on 2022/12/24 18:38
upstream kernel BUG in txUnlock jfs -1 C error 44243 3h07m 1284d 0/29 upstream: reported C repro on 2022/10/01 14:27
linux-4.14 kernel BUG in txUnlock jfs -1 C 2 1130d 1192d 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 (5258):
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
2026/04/08 00:44 linux-6.1.y 1989cd3d56e2 2c961e87 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/04/07 12:36 linux-6.1.y 1989cd3d56e2 628666c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/04/06 16:17 linux-6.1.y 1989cd3d56e2 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/04/02 10:50 linux-6.1.y 1989cd3d56e2 91bc79b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/04/02 02:36 linux-6.1.y 1989cd3d56e2 0cb124d5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/04/01 22:31 linux-6.1.y 1989cd3d56e2 0cb124d5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/04/01 19:01 linux-6.1.y 1989cd3d56e2 9a1f7828 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/04/01 10:49 linux-6.1.y 1989cd3d56e2 9a1f7828 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/04/01 10:46 linux-6.1.y 1989cd3d56e2 9a1f7828 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/31 10:34 linux-6.1.y 1989cd3d56e2 aeea1c72 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/30 22:22 linux-6.1.y 1989cd3d56e2 d0af506e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/30 15:37 linux-6.1.y 1989cd3d56e2 dcaebc52 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/30 09:18 linux-6.1.y 1989cd3d56e2 dcaebc52 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/30 09:18 linux-6.1.y 1989cd3d56e2 dcaebc52 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/28 14:09 linux-6.1.y 1989cd3d56e2 b5ceaad2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/28 01:59 linux-6.1.y 1989cd3d56e2 356bdfc9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/27 22:43 linux-6.1.y 1989cd3d56e2 74a13a23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/26 12:12 linux-6.1.y 1989cd3d56e2 766b6434 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/26 12:12 linux-6.1.y 1989cd3d56e2 766b6434 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/03/25 21:32 linux-6.1.y 1989cd3d56e2 c6143aac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in txUnlock
2026/04/07 23:24 linux-6.1.y 1989cd3d56e2 2c961e87 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/04/07 10:56 linux-6.1.y 1989cd3d56e2 628666c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/04/07 09:18 linux-6.1.y 1989cd3d56e2 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/04/06 13:57 linux-6.1.y 1989cd3d56e2 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/04/06 12:41 linux-6.1.y 1989cd3d56e2 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/04/06 05:13 linux-6.1.y 1989cd3d56e2 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/04/06 02:13 linux-6.1.y 1989cd3d56e2 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/04/05 17:51 linux-6.1.y 1989cd3d56e2 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/04/05 12:14 linux-6.1.y 1989cd3d56e2 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/04/04 17:43 linux-6.1.y 1989cd3d56e2 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/04/03 11:53 linux-6.1.y 1989cd3d56e2 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/04/02 22:58 linux-6.1.y 1989cd3d56e2 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/04/02 22:56 linux-6.1.y 1989cd3d56e2 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/04/02 14:42 linux-6.1.y 1989cd3d56e2 91bc79b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/04/01 22:27 linux-6.1.y 1989cd3d56e2 0cb124d5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/04/01 07:00 linux-6.1.y 1989cd3d56e2 fb8b2c26 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/03/31 22:00 linux-6.1.y 1989cd3d56e2 fb8b2c26 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/03/31 09:38 linux-6.1.y 1989cd3d56e2 aeea1c72 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/03/31 05:09 linux-6.1.y 1989cd3d56e2 d0af506e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/03/30 21:37 linux-6.1.y 1989cd3d56e2 d0af506e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/03/30 05:11 linux-6.1.y 1989cd3d56e2 b5ceaad2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/03/30 02:18 linux-6.1.y 1989cd3d56e2 b5ceaad2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/03/28 01:54 linux-6.1.y 1989cd3d56e2 356bdfc9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in txUnlock
2026/03/27 13:30 linux-6.1.y 1989cd3d56e2 74a13a23 .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.