------------[ cut here ]------------
WARNING: fs/ext4/ext4_jbd2.c:75 at ext4_journal_check_start+0x24f/0x2b0 fs/ext4/ext4_jbd2.c:75, CPU#0: syz.4.27/6074
Modules linked in:
CPU: 0 UID: 0 PID: 6074 Comm: syz.4.27 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:ext4_journal_check_start+0x24f/0x2b0 fs/ext4/ext4_jbd2.c:75
Code: 5b 41 5c 41 5d 41 5e 41 5f 5d e9 7c fe 6c 08 cc e8 c6 4a 57 ff 41 bf fb ff ff ff eb e0 e8 b9 4a 57 ff eb d3 e8 b2 4a 57 ff 90 <0f> 0b 90 eb c8 e8 a7 4a 57 ff 90 0f 0b 90 43 80 7c 25 00 00 0f 85
RSP: 0018:ffffc90006af73d8 EFLAGS: 00010283
RAX: ffffffff8268617e RBX: ffff8880605d4000 RCX: 0000000000080000
RDX: ffffc9000f06b000 RSI: 00000000000008b2 RDI: 00000000000008b3
RBP: 0000000000000365 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100c0bac71 R12: dffffc0000000000
R13: 1ffff1100c0ba8f3 R14: ffff8880605d4798 R15: 0000000000000001
FS:  00007f6dc5d656c0(0000) GS:ffff888126cef000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3035a8c000 CR3: 000000003204c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __ext4_journal_start_sb+0x147/0x580 fs/ext4/ext4_jbd2.c:107
 ext4_sample_last_mounted fs/ext4/file.c:869 [inline]
 ext4_file_open+0x732/0xa40 fs/ext4/file.c:901
 do_dentry_open+0x7d0/0x1270 fs/open.c:962
 vfs_open+0x3b/0x350 fs/open.c:1094
 do_open fs/namei.c:4628 [inline]
 path_openat+0x342a/0x3df0 fs/namei.c:4787
 do_filp_open+0x1fa/0x410 fs/namei.c:4814
 do_open_execat+0x135/0x560 fs/exec.c:783
 open_exec+0x40/0x60 fs/exec.c:822
 bm_register_write+0x234/0x17a0 fs/binfmt_misc.c:820
 vfs_write+0x287/0xb40 fs/read_write.c:684
 ksys_write+0x14b/0x260 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6dc7b1f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6dc5d65038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6dc7d76090 RCX: 00007f6dc7b1f749
RDX: 000000000000004b RSI: 0000200000000140 RDI: 0000000000000004
RBP: 00007f6dc7ba3f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6dc7d76128 R14: 00007f6dc7d76090 R15: 00007fffe4642928
 </TASK>