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WARNING: CPU: 1 PID: 6007 at fs/overlayfs/ovl_entry.h:118 ovl_dentry_weird+0x15a/0x1a0
Modules linked in:
CPU: 1 UID: 0 PID: 6007 Comm: syz.0.22 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:ovl_dentry_weird+0x15a/0x1a0
Code: e8 6b f9 8f fe 83 e5 03 0f 95 c3 31 ff 89 ee e8 9c fd 8f fe 89 d8 5b 41 5c 41 5e 41 5f 5d e9 3d b9 4c 08 cc e8 47 f9 8f fe 90 <0f> 0b 90 e9 08 ff ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 0b
RSP: 0018:ffffc900044ef9c8 EFLAGS: 00010283
RAX: ffffffff832fb1e9 RBX: ffff888106682000 RCX: 0000000000080000
RDX: ffffc90003541000 RSI: 000000000000076d RDI: 000000000000076e
RBP: dffffc0000000000 R08: 0000000031656c69 R09: 1ffff110215f9bac
R10: dffffc0000000000 R11: ffffed10215f9bad R12: dffffc0000000000
R13: 0000000000000003 R14: ffff88811396ceb0 R15: ffff888106682028
FS:  00007f95e6eac6c0(0000) GS:ffff8881a3c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 000000001d2cc000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 ovl_do_parse_layer+0x307/0xbb0
 ovl_parse_param+0xb62/0xee0
 vfs_parse_fs_param+0x1a9/0x420
 vfs_parse_monolithic_sep+0x24d/0x310
 do_new_mount+0x273/0x9e0
 __se_sys_mount+0x317/0x410
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f95e5f8ebe9
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:00007f95e6eac038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f95e61b5fa0 RCX: 00007f95e5f8ebe9
RDX: 0000200000000340 RSI: 00002000000000c0 RDI: 0000000000000000
RBP: 00007f95e6011e19 R08: 0000200000000180 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f95e61b6038 R14: 00007f95e61b5fa0 R15: 00007ffc3ea83428
 </TASK>
