syzbot


WARNING in jbd2_journal_commit_transaction

Status: upstream: reported on 2026/01/11 12:39
Reported-by: syzbot+9ee034c21857cb3be9e7@syzkaller.appspotmail.com
First crash: 3d23h, last: 3d23h
Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in jbd2_journal_commit_transaction origin:lts-only -1 C 7 8d00h 8d16h 0/3 upstream: reported C repro on 2026/01/06 19:32

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 6520 at include/linux/jbd2.h:1727 jbd2_journal_has_csum_v2or3 include/linux/jbd2.h:1726 [inline]
WARNING: CPU: 0 PID: 6520 at include/linux/jbd2.h:1727 jbd2_journal_commit_transaction+0x5017/0x5db0 fs/jbd2/commit.c:413
Modules linked in:
CPU: 0 PID: 6520 Comm: jbd2/loop0-75 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:jbd2_journal_has_csum_v2or3 include/linux/jbd2.h:1726 [inline]
RIP: 0010:jbd2_journal_commit_transaction+0x5017/0x5db0 fs/jbd2/commit.c:413
Code: ff e8 8d 06 5c ff 0f 0b e9 5e c0 ff ff e8 81 06 5c ff 0f 0b e9 ae f8 ff ff e8 75 06 5c ff 0f 0b e9 1a fb ff ff e8 69 06 5c ff <0f> 0b e9 c2 b2 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 01 b2 ff
RSP: 0018:ffffc900036cf940 EFLAGS: 00010293
RAX: ffffffff821bc5a7 RBX: ffff88805c27a980 RCX: ffff88802a6f0000
RDX: 0000000000000000 RSI: 0000000008000000 RDI: 0000000000000000
RBP: ffffc900036cfd50 R08: dffffc0000000000 R09: ffffc900036cfbe0
R10: fffff520006d9f81 R11: 1ffff920006d9f7c R12: ffffc900036cfc60
R13: ffff88805c27a198 R14: ffffc900036cfb50 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f24ee38c198 CR3: 0000000053de4000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kjournald2+0x460/0x8f0 fs/jbd2/journal.c:213
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/11 12:39 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in jbd2_journal_commit_transaction
* Struck through repros no longer work on HEAD.