------------[ cut here ]------------
WARNING: CPU: 1 PID: 1951 at fs/inode.c:417 drop_nlink+0xc5/0x110
Modules linked in:
CPU: 1 UID: 0 PID: 1951 Comm: syz.2.5951 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:drop_nlink+0xc5/0x110
Code: 78 07 00 00 be 08 00 00 00 e8 d7 f0 e7 ff f0 48 ff 83 78 07 00 00 5b 41 5c 41 5e 41 5f 5d e9 82 34 41 09 cc e8 8c 84 84 ff 90 <0f> 0b 90 eb 81 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 5b ff ff ff
RSP: 0018:ffffc900064bf8c8 EFLAGS: 00010293
RAX: ffffffff823b26a4 RBX: ffff88803964af38 RCX: ffff888108cc5640
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffc900064bf887 R09: 1ffff92000c97f10
R10: dffffc0000000000 R11: fffff52000c97f11 R12: 1ffff110072c95f0
R13: 0000000068aa36de R14: ffff88803964af80 R15: dffffc0000000000
FS:  00007f58bff586c0(0000) GS:ffff8881a3c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f58bff58d58 CR3: 0000000011280000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 shmem_unlink+0x1f5/0x2d0
 shmem_rename2+0x22d/0x360
 vfs_rename+0xbda/0xf00
 ovl_cleanup_and_whiteout+0x61d/0x900
 ovl_do_remove+0x814/0xda0
 vfs_unlink+0x394/0x650
 do_unlinkat+0x345/0x560
 __x64_sys_unlink+0x47/0x50
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f58bf18ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f58bff58038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007f58bf3b6090 RCX: 00007f58bf18ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000200
RBP: 00007f58bf211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f58bf3b6128 R14: 00007f58bf3b6090 R15: 00007ffd12f72728
 </TASK>
