------------[ cut here ]------------
WARNING: fs/ext4/ext4_jbd2.c:75 at ext4_journal_check_start+0x24f/0x2b0 fs/ext4/ext4_jbd2.c:75, CPU#1: syz.8.1175/11534
Modules linked in:
CPU: 1 UID: 0 PID: 11534 Comm: syz.8.1175 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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 cc 0e ec 08 cc e8 26 ec 4d ff 41 bf fb ff ff ff eb e0 e8 19 ec 4d ff eb d3 e8 12 ec 4d ff 90 <0f> 0b 90 eb c8 e8 07 ec 4d ff 90 0f 0b 90 43 80 7c 25 00 00 0f 85
RSP: 0018:ffffc90004aff698 EFLAGS: 00010293
RAX: ffffffff8273dd6e RBX: ffff88807ee1c000 RCX: ffff888027991e80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000365 R08: ffff88803131a387 R09: 1ffff11006263470
R10: dffffc0000000000 R11: ffffed1006263471 R12: dffffc0000000000
R13: 1ffff1100fdc38c7 R14: ffff88807ee1c638 R15: 0000000000000001
FS:  00007faac108a6c0(0000) GS:ffff888125d2d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2011372a60 CR3: 0000000028c26000 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+0x72c/0xa40 fs/ext4/file.c:901
 do_dentry_open+0x785/0x14e0 fs/open.c:962
 vfs_open+0x3b/0x340 fs/open.c:1094
 do_open fs/namei.c:4627 [inline]
 path_openat+0x2de0/0x3840 fs/namei.c:4786
 do_filp_open+0x1fa/0x410 fs/namei.c:4813
 do_sys_openat2+0x121/0x200 fs/open.c:1391
 do_sys_open fs/open.c:1397 [inline]
 __do_sys_openat fs/open.c:1413 [inline]
 __se_sys_openat fs/open.c:1408 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1408
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faac018f749
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:00007faac108a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007faac03e6090 RCX: 00007faac018f749
RDX: 0000000000000000 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007faac0213f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000028 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faac03e6128 R14: 00007faac03e6090 R15: 00007fffee782488
 </TASK>