------------[ cut here ]------------
WARNING: fs/ext4/ext4_jbd2.c:76 at ext4_journal_check_start+0x24f/0x2b0 fs/ext4/ext4_jbd2.c:76, CPU#1: syz.2.7671/29258
Modules linked in:
CPU: 1 UID: 0 PID: 29258 Comm: syz.2.7671 Not tainted 6.16.0-next-20250804-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:ext4_journal_check_start+0x24f/0x2b0 fs/ext4/ext4_jbd2.c:76
Code: 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 56 3b 53 ff 41 bf fb ff ff ff eb e0 e8 49 3b 53 ff eb d3 e8 42 3b 53 ff 90 <0f> 0b 90 eb c8 e8 37 3b 53 ff 90 0f 0b 90 43 80 7c 25 00 00 0f 85
RSP: 0018:ffffc9000a9c7398 EFLAGS: 00010283
RAX: ffffffff826c781e RBX: ffff88805454c000 RCX: 0000000000080000
RDX: ffffc90010aec000 RSI: 0000000000000806 RDI: 0000000000000807
RBP: 0000000000000365 R08: ffff888032980387 R09: 1ffff11006530070
R10: dffffc0000000000 R11: ffffed1006530071 R12: dffffc0000000000
R13: 1ffff1100a8a98c8 R14: ffff88805454c640 R15: 0000000000000001
FS:  00007f83ca3f66c0(0000) GS:ffff888125d17000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc648cdd714 CR3: 000000006657a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000004 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __ext4_journal_start_sb+0x16b/0x5c0 fs/ext4/ext4_jbd2.c:108
 ext4_sample_last_mounted fs/ext4/file.c:869 [inline]
 ext4_file_open+0x72c/0xa40 fs/ext4/file.c:901
 do_dentry_open+0x950/0x13f0 fs/open.c:965
 vfs_open+0x3b/0x340 fs/open.c:1095
 do_open fs/namei.c:3887 [inline]
 path_openat+0x2ee5/0x3830 fs/namei.c:4046
 do_filp_open+0x1fa/0x410 fs/namei.c:4073
 do_open_execat+0x135/0x560 fs/exec.c:783
 open_exec+0x40/0x60 fs/exec.c:822
 bm_register_write+0x2d1/0x1750 fs/binfmt_misc.c:795
 vfs_write+0x27b/0xb30 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f83cc58eb69
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:00007f83ca3f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f83cc7b6080 RCX: 00007f83cc58eb69
RDX: 000000000000004b RSI: 0000200000000140 RDI: 0000000000000004
RBP: 00007f83cc611df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f83cc7b6080 R15: 00007ffebd0b9dc8
 </TASK>