------------[ cut here ]------------
!buffer_uptodate(bh)
WARNING: fs/buffer.c:1087 at mark_buffer_dirty+0x299/0x410 fs/buffer.c:1087, CPU#0: syz.0.0/5331
Modules linked in:
CPU: 0 UID: 0 PID: 5331 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:mark_buffer_dirty+0x299/0x410 fs/buffer.c:1087
Code: 4c 89 f7 e8 b9 5c da ff 49 8b 3e be 40 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 b4 63 fb ff e8 ef 90 6d ff eb 8c e8 e8 90 6d ff 90 <0f> 0b 90 e9 a5 fd ff ff e8 da 90 6d ff 90 0f 0b 90 e9 cf fd ff ff
RSP: 0018:ffffc9000f047bb0 EFLAGS: 00010293
RAX: ffffffff825842e8 RBX: ffff888047c321d0 RCX: ffff888011dda500
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffc9000f047c01 R08: ffff888047c321d7 R09: 1ffff11008f8643a
R10: dffffc0000000000 R11: ffffed1008f8643b R12: ffff8880507c0009
R13: 1ffff92001e08f84 R14: dffffc0000000000 R15: ffff888047c321d0
FS:  00007fdeca4316c0(0000) GS:ffff88808c87f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdeca430fe8 CR3: 0000000012029000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 udf_open_lvid+0x38a/0x5d0 fs/udf/super.c:2078
 udf_reconfigure+0x336/0x540 fs/udf/super.c:679
 reconfigure_super+0x227/0x8a0 fs/super.c:1080
 vfs_cmd_reconfigure fs/fsopen.c:268 [inline]
 vfs_fsconfig_locked+0x171/0x320 fs/fsopen.c:297
 __do_sys_fsconfig fs/fsopen.c:463 [inline]
 __se_sys_fsconfig+0x6c9/0x820 fs/fsopen.c:350
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdec959ce59
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:00007fdeca430fe8 EFLAGS: 00000246 ORIG_RAX: 00000000000001af
RAX: ffffffffffffffda RBX: 00007fdec9816180 RCX: 00007fdec959ce59
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000008
RBP: 00007fdec9632d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdec9816218 R14: 00007fdec9816180 R15: 00007fff22ea5868
 </TASK>