Zero length message leads to an empty skb
loop0: detected capacity change from 0 to 64
=======================================================
WARNING: The mand mount option has been deprecated and
         and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
loop0: detected capacity change from 64 to 0
Buffer I/O error on dev loop0, logical block 62, lost sync page write
hfs: unable to read volume bitmap
------------[ cut here ]------------
!buffer_uptodate(bh)
WARNING: fs/buffer.c:1093 at mark_buffer_dirty+0x299/0x410 fs/buffer.c:1093, 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:1093
Code: 4c 89 f7 e8 f9 0b d9 ff 49 8b 3e be 40 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 04 5e fb ff e8 0f db 69 ff eb 8c e8 08 db 69 ff 90 <0f> 0b 90 e9 a5 fd ff ff e8 fa da 69 ff 90 0f 0b 90 e9 cf fd ff ff
RSP: 0018:ffffc9000f1ffbc8 EFLAGS: 00010283
RAX: ffffffff825d4948 RBX: ffff888043de77e0 RCX: 0000000000100000
RDX: ffffc90020001000 RSI: 0000000000001924 RDI: 0000000000001925
RBP: 1ffff1100254b001 R08: ffff888043de77e7 R09: 1ffff110087bcefc
R10: dffffc0000000000 R11: ffffed10087bcefd R12: dffffc0000000000
R13: ffff888012a58668 R14: ffff88801fd00c0b R15: ffff88801fcf5492
FS:  00007fbc173f56c0(0000) GS:ffff88808c543000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000405ba000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 hfs_mdb_commit+0x860/0x1160 fs/hfs/mdb.c:328
 hfs_sync_fs+0x1d/0x30 fs/hfs/super.c:38
 sync_filesystem+0x1cf/0x230 fs/sync.c:66
 hfs_reconfigure+0x66/0x270 fs/hfs/super.c:122
 reconfigure_super+0x232/0x8f0 fs/super.c:1020
 do_remount fs/namespace.c:3407 [inline]
 path_mount+0xd4b/0x1040 fs/namespace.c:4153
 do_mount fs/namespace.c:4174 [inline]
 __do_sys_mount fs/namespace.c:4390 [inline]
 __se_sys_mount+0x31d/0x420 fs/namespace.c:4367
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbc1af9df99
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:00007fbc173f4fe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fbc1b225fa0 RCX: 00007fbc1af9df99
RDX: 0000000000000000 RSI: 0000200000000580 RDI: 0000000000000000
RBP: 00007fbc1b034ec4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000002236824 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbc1b226038 R14: 00007fbc1b225fa0 R15: 00007ffe7376dca8
 </TASK>