------------[ cut here ]------------
sb_rdonly(sb)
WARNING: fs/ext4/ext4_jbd2.c:83 at ext4_journal_check_start+0x24f/0x2b0 fs/ext4/ext4_jbd2.c:83, CPU#0: syz.2.4425/17721
Modules linked in:
CPU: 0 UID: 0 PID: 17721 Comm: syz.2.4425 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:ext4_journal_check_start+0x24f/0x2b0 fs/ext4/ext4_jbd2.c:83
Code: 5b 41 5c 41 5d 41 5e 41 5f 5d e9 bc 80 56 09 cc e8 16 ce 3f ff 41 bf fb ff ff ff eb e0 e8 09 ce 3f ff eb d3 e8 02 ce 3f ff 90 <0f> 0b 90 eb c8 e8 f7 cd 3f ff 90 0f 0b 90 43 80 7c 25 00 00 0f 85
RSP: 0018:ffffc9000f6e7810 EFLAGS: 00010287
RAX: ffffffff8287b6fe RBX: ffff88803568e000 RCX: 0000000000080000
RDX: ffffc9000f29f000 RSI: 00000000000007ae RDI: 00000000000007af
RBP: 0000000000000001 R08: ffff888078b4040f R09: 1ffff1100f168081
R10: dffffc0000000000 R11: ffffed100f168082 R12: dffffc0000000000
R13: 1ffff11006ad1ccf R14: ffff88803568e678 R15: 0000000000000001
FS:  00007f8a96a426c0(0000) GS:ffff888124f0c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33d1aff8 CR3: 0000000055952000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __ext4_journal_start_sb+0x14b/0x780 fs/ext4/ext4_jbd2.c:115
 ext4_sample_last_mounted fs/ext4/file.c:941 [inline]
 ext4_file_open+0x76a/0xab0 fs/ext4/file.c:973
 do_dentry_open+0x816/0x1380 fs/open.c:996
 vfs_open+0x3b/0x340 fs/open.c:1101
 do_open fs/namei.c:4837 [inline]
 path_openat+0x1443/0x1d60 fs/namei.c:5000
 do_file_open+0x23e/0x4a0 fs/namei.c:5029
 do_sys_openat2+0x115/0x200 fs/open.c:1417
 do_sys_open fs/open.c:1423 [inline]
 __do_sys_openat fs/open.c:1439 [inline]
 __se_sys_openat fs/open.c:1434 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1434
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x510 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8a95b9e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8a96a42028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f8a95e26090 RCX: 00007f8a95b9e0d9
RDX: 0000000000129080 RSI: 0000200000000140 RDI: ffffffffffffff9c
RBP: 00007f8a95c35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000010 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8a95e26128 R14: 00007f8a95e26090 R15: 00007ffea89235a8
 </TASK>