overlayfs: failed lookup in lower (newroot/31, name='file1', err=-40): overlapping layers
------------[ cut here ]------------
WARNING: CPU: 2 PID: 6388 at fs/inode.c:417 drop_nlink+0xac/0xd0 fs/inode.c:417
Modules linked in:
CPU: 2 UID: 0 PID: 6388 Comm: syz.0.82 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:drop_nlink+0xac/0xd0 fs/inode.c:417
Code: 48 8b 5d 28 be 08 00 00 00 48 8d bb 78 07 00 00 e8 59 bb e5 ff f0 48 ff 83 78 07 00 00 5b 5d e9 aa 5c 7f ff e8 a5 5c 7f ff 90 <0f> 0b 90 c7 45 48 ff ff ff ff 5b 5d e9 93 5c 7f ff e8 2e b3 e5 ff
RSP: 0018:ffffc900027579a8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff823c342f
RDX: ffff8880570e4880 RSI: ffffffff823c349b RDI: 0000000000000005
RBP: ffff88802a9328b0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888024110000
R13: ffff88802a9328b0 R14: 00000000041feb25 R15: 0000000000002000
FS:  00007f9af59576c0(0000) GS:ffff8880d68bc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9af5956f98 CR3: 000000005775e000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 shmem_unlink+0x183/0x350 mm/shmem.c:4041
 shmem_rename2+0x1f5/0x3a0 mm/shmem.c:4127
 vfs_rename+0xfba/0x22c0 fs/namei.c:5129
 ovl_do_rename fs/overlayfs/overlayfs.h:374 [inline]
 ovl_cleanup_and_whiteout+0x37f/0xba0 fs/overlayfs/dir.c:148
 ovl_remove_and_whiteout fs/overlayfs/dir.c:796 [inline]
 ovl_do_remove+0x98a/0x1040 fs/overlayfs/dir.c:915
 vfs_unlink+0x2fe/0x9b0 fs/namei.c:4586
 do_unlinkat+0x4c5/0x6a0 fs/namei.c:4650
 __do_sys_unlink fs/namei.c:4696 [inline]
 __se_sys_unlink fs/namei.c:4694 [inline]
 __x64_sys_unlink+0xc5/0x110 fs/namei.c:4694
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9af4b8ebe9
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:00007f9af5957038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007f9af4db6090 RCX: 00007f9af4b8ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000200
RBP: 00007f9af4c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9af4db6128 R14: 00007f9af4db6090 R15: 00007fff183ee6d8
 </TASK>