------------[ 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.1.132/10023
Modules linked in:
CPU: 0 UID: 0 PID: 10023 Comm: syz.1.132 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
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 8c 50 dd 08 cc e8 96 3e 47 ff 41 bf fb ff ff ff eb e0 e8 89 3e 47 ff eb d3 e8 82 3e 47 ff 90 <0f> 0b 90 eb c8 e8 77 3e 47 ff 90 0f 0b 90 43 80 7c 25 00 00 0f 85
RSP: 0018:ffffc90005a3f5b0 EFLAGS: 00010293
RAX: ffffffff827f99ae RBX: ffff888033f58000 RCX: ffff88802c6b9f40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100c6d2881 R12: dffffc0000000000
R13: 1ffff110067eb105 R14: ffff888033f58828 R15: 0000000000000001
FS:  00007ff5c76266c0(0000) GS:ffff888125bc2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe4b811e368 CR3: 000000001dbe6000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __ext4_journal_start_sb+0x14b/0x780 fs/ext4/ext4_jbd2.c:115
 __ext4_new_inode+0x130b/0x3ec0 fs/ext4/ialloc.c:1091
 ext4_mkdir+0x3ee/0xce0 fs/ext4/namei.c:3014
 vfs_mkdir+0x408/0x620 fs/namei.c:5410
 cachefiles_get_directory+0x23c/0xa30 fs/cachefiles/namei.c:132
 cachefiles_add_cache+0xb06/0xde0 fs/cachefiles/cache.c:127
 cachefiles_daemon_write+0x608/0x6c0 fs/cachefiles/daemon.c:284
 vfs_write+0x29f/0xbb0 fs/read_write.c:685
 ksys_write+0x156/0x270 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff5c93ce159
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:00007ff5c7626028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff5c9655fa0 RCX: 00007ff5c93ce159
RDX: 0000000000000004 RSI: 0000200000000700 RDI: 0000000000000005
RBP: 00007ff5c946506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff5c9656038 R14: 00007ff5c9655fa0 R15: 00007ffd5e94cfd8
 </TASK>