syzbot


kernel BUG in txLock (2)

Status: upstream: reported C repro on 2024/03/28 08:26
Subsystems: jfs
[Documentation on labels]
Reported-by: syzbot+a843f6ae2130a987d63b@syzkaller.appspotmail.com
First crash: 826d, last: 1d14h
Cause bisection: failed (error log, bisect log)
  
Fix bisection: failed (error log, bisect log)
  
✨ AI Patch Versions (1)
Version Stage Reported Report Link Job
1 moderation 2026/06/29 22:55 Discussion 62ec5f45-38f7-4129-96f4-2509f8ed6b21
✨ AI Jobs (7)
ID Workflow Result Correct Bug Created Started Finished Revision Error
62ec5f45-38f7-4129-96f4-2509f8ed6b21 patching kernel BUG in txLock (2) 2026/06/29 20:23 2026/06/29 20:23 2026/06/29 22:54 fff8d0a0e302881e84edbe2230016e3bec252ec6

			
		
5ef98f4e-5e9c-42cb-8b5f-20b141a88468 patching 💥 kernel BUG in txLock (2) 2026/06/26 19:54 2026/06/26 22:15 2026/06/26 22:15 7ff32d8bb9773a5f02d3db4c8207fc9251ebedc5
failed to run ["git" "-c" "core.hooksPath=/dev/null" "fetch" "--force" "f569e972c8e9057ee9c286220c83a480ebf30cc5" "master"]: exit status 128
error: insufficient permission for adding an object to repo...
truncated to first 200 bytes; open job for full error
c3877929-63e3-4f42-b53a-6a694ddc722e assessment-security 💥 kernel BUG in txLock (2) 2026/06/22 01:20 2026/06/22 01:20 2026/06/22 01:39 43bfcdb07c3552e4664e1029672054ac0924d543
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/26ff704851aeea83da...
truncated to first 200 bytes; open job for full error
fa0b3851-9fd4-41d1-8e74-4f235b246a79 assessment-security 💥 kernel BUG in txLock (2) 2026/06/14 01:12 2026/06/14 01:12 2026/06/14 01:34 4f06757f683a802254a4c8edbfe67ff801904c5e
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/26ff704851aeea83da...
truncated to first 200 bytes; open job for full error
7cbb92ff-d9a2-4279-ad7c-f50874bf6ccd assessment-security 💥 kernel BUG in txLock (2) 2026/06/09 16:20 2026/06/09 16:20 2026/06/09 16:39 c36c07f6c1f2230a36374cbd22235f635e8f9284
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/26ff704851aeea83da...
truncated to first 200 bytes; open job for full error
b108ac83-5ee1-4965-ac65-6663f8d88679 assessment-security 💥 kernel BUG in txLock (2) 2026/06/02 10:56 2026/06/02 10:56 2026/06/02 11:22 1095583bae1d2729a3b4be301cb6ddc85ced9e38
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/26ff704851aeea83da...
truncated to first 200 bytes; open job for full error
a7ea6256-ffc7-4b10-b49d-d1874bb6e4e8 assessment-security 💥 kernel BUG in txLock (2) 2026/05/24 08:16 2026/05/24 08:16 2026/05/24 08:41 c69befb30ac10e158cc9d1557b508ee3f0eca1de
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/26ff704851aeea83da...
truncated to first 200 bytes; open job for full error
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [jfs?] kernel BUG in txLock (2) 0 (1) 2024/03/28 08:26
Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 kernel BUG in txLock (2) origin:upstream -1 C 15 11d 583d 0/3 upstream: reported C repro on 2024/11/25 09:43
linux-6.6 kernel BUG in txLock origin:upstream -1 C error 9 31d 189d 0/2 upstream: reported C repro on 2025/12/24 20:44
linux-5.15 kernel BUG in txLock -1 1 1028d 1028d 0/3 auto-obsoleted due to no activity on 2023/12/16 09:17
upstream kernel BUG in txLock jfs -1 C inconclusive done 10 909d 1026d 25/29 fixed on 2024/02/16 19:40
linux-6.1 kernel BUG in txLock origin:upstream -1 C error 24 6d17h 472d 0/3 upstream: reported C repro on 2025/03/16 14:14
Last patch testing requests (10)
Created Duration User Patch Repo Result
2025/10/01 12:48 23m retest repro upstream OK log
2025/09/16 22:55 24m retest repro linux-next OK log
2025/09/16 22:55 2h51m retest repro linux-next OK log
2025/08/21 02:05 20m retest repro upstream report log
2025/07/23 09:52 15m retest repro upstream report log
2025/07/08 21:00 16m retest repro linux-next report log
2025/07/08 21:00 16m retest repro linux-next report log
2025/06/11 18:34 27m retest repro upstream report log
2025/05/12 04:14 49m retest repro upstream report log
2025/04/29 11:28 22m retest repro linux-next error
Fix bisection attempts (6)
Created Duration User Patch Repo Result
2025/09/25 21:59 11m bisect fix upstream error job log
2025/04/02 03:36 6h58m bisect fix upstream OK (0) job log log
2025/01/22 11:54 2h32m bisect fix upstream OK (0) job log log
2024/09/15 02:30 2h52m bisect fix upstream OK (0) job log log
2024/08/14 20:22 2h15m bisect fix upstream OK (0) job log log
2024/06/28 19:42 8h16m bisect fix upstream OK (0) job log log

Sample crash report:
Locker's tblock: ffffc90002628310: 02628310 ffffc900 02628310 ffffc900
Locker's tblock: ffffc90002628320: 00000004 00000024 00000023 00000000
Tlock: ffffc900028490d8: 00010004 202088c4 7fc15d90 ffff8880
Tlock: ffffc900028490e8: 77540430 ffff8880 01140000 05000010
Tlock: ffffc900028490f8: 00000001 0000002f 00000000 00000000
Tlock: ffffc90002849108: 00000000 00000000 00000000 00000000
Tlock: ffffc90002849118: 00000000 00000000
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_txnmgr.c:834!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 1 PID: 5069 Comm: syz-executor201 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:txLock+0x1ed3/0x21a0 fs/jfs/jfs_txnmgr.c:834
Code: 48 c7 c6 00 3c e2 8b ba 01 00 00 00 b9 10 00 00 00 41 b8 04 00 00 00 4c 8b 4c 24 20 6a 00 6a 48 e8 52 e6 7a 01 48 83 c4 10 90 <0f> 0b e8 56 4e 72 fe 4c 89 f7 48 c7 c6 00 44 e2 8b e8 67 33 b8 fe
RSP: 0018:ffffc9000431f340 EFLAGS: 00010282
RAX: 48dda4629d120c00 RBX: 0000000000000010 RCX: ffff888026889e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000431f490 R08: ffffffff8175c06c R09: fffffbfff1bf9650
R10: dffffc0000000000 R11: fffffbfff1bf9650 R12: 1ffff9200050921b
R13: ffff88807757dc80 R14: 000000000000001b R15: ffffc900028490da
FS:  00007f7083b726c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f707c5ff000 CR3: 0000000023ae4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dtSplitRoot+0x430/0x1930 fs/jfs/jfs_dtree.c:1924
 dtSplitUp fs/jfs/jfs_dtree.c:990 [inline]
 dtInsert+0x12fa/0x6b00 fs/jfs/jfs_dtree.c:868
 jfs_create+0x7ba/0xb90 fs/jfs/namei.c:137
 vfs_create+0x23c/0x390 fs/namei.c:3199
 do_mknodat+0x44a/0x5b0 fs/namei.c:4051
 __do_sys_mknodat fs/namei.c:4082 [inline]
 __se_sys_mknodat fs/namei.c:4079 [inline]
 __x64_sys_mknodat+0xa9/0xc0 fs/namei.c:4079
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f7083bdcc59
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7083b72218 EFLAGS: 00000246 ORIG_RAX: 0000000000000103
RAX: ffffffffffffffda RBX: 00007f7083c6a6d8 RCX: 00007f7083bdcc59
RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000004
RBP: 00007f7083c6a6d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000700 R11: 0000000000000246 R12: 00007f7083c3106b
R13: 0030656c69662f2e R14: 7261637369646f6e R15: 6573726168636f69
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:txLock+0x1ed3/0x21a0 fs/jfs/jfs_txnmgr.c:834
Code: 48 c7 c6 00 3c e2 8b ba 01 00 00 00 b9 10 00 00 00 41 b8 04 00 00 00 4c 8b 4c 24 20 6a 00 6a 48 e8 52 e6 7a 01 48 83 c4 10 90 <0f> 0b e8 56 4e 72 fe 4c 89 f7 48 c7 c6 00 44 e2 8b e8 67 33 b8 fe
RSP: 0018:ffffc9000431f340 EFLAGS: 00010282
RAX: 48dda4629d120c00 RBX: 0000000000000010 RCX: ffff888026889e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000431f490 R08: ffffffff8175c06c R09: fffffbfff1bf9650
R10: dffffc0000000000 R11: fffffbfff1bf9650 R12: 1ffff9200050921b
R13: ffff88807757dc80 R14: 000000000000001b R15: ffffc900028490da
FS:  00007f7083b726c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f707c5ff000 CR3: 0000000023ae4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (661):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/03/29 07:25 upstream fe46a7dd189e 120789fd .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-smack-root kernel BUG in txLock
2026/02/14 03:09 upstream cee73b1e840c 1e62d198 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci-snapshot-upstream-root kernel BUG in txLock
2025/11/08 06:44 upstream da32d155f4a8 4e1406b4 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro #1 (corrupt fs)] [mounted in repro #2 (corrupt fs)] ci2-upstream-fs kernel BUG in txLock
2026/06/28 15:06 upstream 8b69c0475871 fb92f11c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/28 13:43 upstream 8b69c0475871 fb92f11c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/28 08:39 upstream 780d569e6c4b fb92f11c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/24 09:38 upstream 558ef39aeb9a 042555ff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/24 04:17 upstream 558ef39aeb9a 042555ff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/23 20:47 upstream 502d801f0ab0 4b1d8f01 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/23 19:27 upstream 502d801f0ab0 4b1d8f01 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/23 16:21 upstream 502d801f0ab0 4b1d8f01 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/23 14:43 upstream 502d801f0ab0 4b1d8f01 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root kernel BUG in txLock
2026/06/23 02:38 upstream ef0c9f75a195 5a630be6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root kernel BUG in txLock
2026/06/23 01:21 upstream 1dc18801be29 5a630be6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/23 00:03 upstream 1dc18801be29 5a630be6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/22 09:12 upstream ef0c9f75a195 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/21 23:53 upstream 8cd8cf7a07e5 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/21 16:39 upstream 390d73adf896 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/21 09:06 upstream 390d73adf896 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/21 00:29 upstream 1a3746ccbb0a 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/20 17:42 upstream 1a3746ccbb0a 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/20 16:27 upstream 1a3746ccbb0a 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root kernel BUG in txLock
2026/06/20 07:14 upstream 5e2e14749c3d 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/19 05:10 upstream 83f1454877cc a776b0d0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/16 09:28 upstream 31e6aeafcdde 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/15 23:30 upstream 0e0611827f33 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/15 21:30 upstream 0e0611827f33 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/15 18:09 upstream 0e0611827f33 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/14 22:15 upstream e21ee273e6fa 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/13 17:13 upstream 062871f1371b 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/11 09:15 upstream 9716c086c8e8 b754d2d8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root kernel BUG in txLock
2026/06/07 23:46 upstream 33d8d8ec31b5 cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/07 12:33 upstream 979c294509f9 cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txLock
2026/06/06 17:06 upstream c10130c234c8 cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root kernel BUG in txLock
2025/10/09 09:08 upstream ec714e371f22 7e2882b3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root kernel BUG in txLock
2024/03/28 05:04 upstream fe46a7dd189e 454571b6 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-smack-root kernel BUG in txLock
2026/06/30 17:44 upstream dc59e4fea9d8 e5173a01 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txLock
2026/06/30 04:58 upstream dc59e4fea9d8 fff8d0a0 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txLock
2026/06/23 13:34 upstream 502d801f0ab0 4b1d8f01 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txLock
2026/06/22 04:37 upstream 8cd8cf7a07e5 43bfcdb0 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txLock
2026/06/20 02:36 upstream a975094bf98c 43bfcdb0 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txLock
2026/06/15 03:51 upstream e21ee273e6fa 4f06757f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txLock
2026/06/13 08:25 upstream 1dadb7e7eb5a 4f06757f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txLock
2026/06/11 03:52 upstream 9716c086c8e8 b754d2d8 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txLock
2026/06/10 17:01 upstream acb7500801e9 f79bac11 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txLock
2026/06/10 08:21 upstream 685441a6d3f1 34dab4be .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txLock
2026/06/09 21:48 upstream 2d3090a8aeb5 c36c07f6 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txLock
2026/06/09 13:49 upstream 2d3090a8aeb5 c36c07f6 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txLock
2026/06/05 17:59 upstream ddd664bbff63 48b6c3fa .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txLock
2026/04/06 12:53 linux-next cc13002a9f98 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in txLock
2024/04/03 17:10 linux-next 727900b675b7 fed899ed .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root kernel BUG in txLock
2024/04/02 01:52 linux-next a6bd6c933339 6baf5069 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root kernel BUG in txLock
2026/02/01 22:50 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 6b8752f2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in txLock
* Struck through repros no longer work on HEAD.