------------[ cut here ]------------
WARNING: CPU: 0 PID: 998 at fs/ext4/ext4_jbd2.c:79 ext4_journal_check_start+0x25a/0x2b0 fs/ext4/ext4_jbd2.c:79
Modules linked in:
CPU: 0 UID: 0 PID: 998 Comm: kworker/u8:5 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: writeback wb_workfn (flush-7:5)
RIP: 0010:ext4_journal_check_start+0x25a/0x2b0 fs/ext4/ext4_jbd2.c:79
Code: e7 a5 a3 fe cc e8 96 13 53 ff 41 bf fb ff ff ff eb e0 e8 89 13 53 ff eb d3 e8 82 13 53 ff 90 0f 0b 90 eb c8 e8 77 13 53 ff 90 <0f> 0b 90 43 80 7c 25 00 00 0f 85 fb fe ff ff e9 fe fe ff ff 44 89
RSP: 0018:ffffc90003c4ec38 EFLAGS: 00010293
RAX: ffffffff826c9b49 RBX: ffff88807abb8000 RCX: ffff8880258b0000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004
RBP: 0000000000000004 R08: ffff88807abba387 R09: 1ffff1100f577470
R10: dffffc0000000000 R11: ffffed100f577471 R12: dffffc0000000000
R13: 1ffff1100f5770c8 R14: ffff88807abb8640 R15: ffff88807abb8340
FS:  0000000000000000(0000) GS:ffff888125c12000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055fe7239b6c0 CR3: 000000005aa57000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __ext4_journal_start_sb+0x16b/0x5c0 fs/ext4/ext4_jbd2.c:108
 __ext4_journal_start fs/ext4/ext4_jbd2.h:242 [inline]
 ext4_do_writepages+0xf6c/0x4610 fs/ext4/inode.c:2913
 ext4_writepages+0x205/0x350 fs/ext4/inode.c:3025
 do_writepages+0x32e/0x550 mm/page-writeback.c:2634
 __writeback_single_inode+0x145/0xff0 fs/fs-writeback.c:1680
 writeback_sb_inodes+0x6c7/0x1010 fs/fs-writeback.c:1976
 wb_writeback+0x43b/0xaf0 fs/fs-writeback.c:2156
 wb_do_writeback fs/fs-writeback.c:2303 [inline]
 wb_workfn+0x409/0xef0 fs/fs-writeback.c:2343
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x439/0x7d0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>