------------[ cut here ]------------
!buffer_uptodate(bh)
WARNING: fs/buffer.c:1180 at mark_buffer_dirty+0x299/0x440 fs/buffer.c:1180, CPU#0: syz.0.0/5327
Modules linked in:
CPU: 0 UID: 0 PID: 5327 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+0x299/0x440 fs/buffer.c:1180
Code: 4c 89 f7 e8 79 fd d9 ff 49 8b 3e be 40 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 e4 60 fb ff e8 9f 34 6e ff eb 8c e8 98 34 6e ff 90 <0f> 0b 90 e9 a5 fd ff ff e8 8a 34 6e ff 90 0f 0b 90 e9 cf fd ff ff
RSP: 0018:ffffc9000f7cf890 EFLAGS: 00010293
RAX: ffffffff825778b8 RBX: ffff8880476b0910 RCX: ffff88801f38c980
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffff88801cc2d901 R08: ffff8880476b0917 R09: 1ffff11008ed6122
R10: dffffc0000000000 R11: ffffed1008ed6123 R12: dffffc0000000000
R13: ffff888047777b58 R14: ffffea0001565318 R15: 0000000000000000
FS:  00007fc295e246c0(0000) GS:ffff88808ca58000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3cc1b97708 CR3: 0000000011ad1000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 mark_buffer_dirty_inode+0x86/0x2f0 fs/buffer.c:680
 fat_remove_entries+0x181/0x400 fs/fat/dir.c:1065
 do_msdos_rename fs/fat/namei_msdos.c:585 [inline]
 msdos_rename+0xf4e/0x1370 fs/fat/namei_msdos.c:627
 vfs_rename+0xa96/0xeb0 fs/namei.c:6026
 filename_renameat2+0x539/0x9c0 fs/namei.c:6144
 __do_sys_rename fs/namei.c:6188 [inline]
 __se_sys_rename+0x55/0x2c0 fs/namei.c:6184
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc294f9c799
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:00007fc295e23fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007fc295216180 RCX: 00007fc294f9c799
RDX: 0000000000000000 RSI: 0000200000000300 RDI: 0000200000000000
RBP: 00007fc295032c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc295216218 R14: 00007fc295216180 R15: 00007fff56f8db98
 </TASK>