overlayfs: upperdir is in-use as upperdir/workdir of another mount, mount with '-o index=off' to override exclusive upperdir protection.
------------[ cut here ]------------
kernel BUG at fs/namei.c:250!
invalid opcode: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 19438 Comm: syz-executor.0 Not tainted 5.8.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:putname+0x45/0x50 fs/namei.c:250
Code: db 1d 03 48 39 d6 74 16 48 89 fb 48 89 c7 e8 82 53 fb ff 48 89 df 5b e9 e9 4f fb ff 5b c3 5b 48 89 fe 48 89 c7 e9 6b 53 fb ff <0f> 0b 66 0f 1f 84 00 00 00 00 00 41 56 41 55 41 89 f5 41 54 49 89
RSP: 0018:ffffc90002e43ec8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88810d997000 RCX: ffffc90002e43e4c
RDX: 0000000000000000 RSI: ffffffff842e0540 RDI: ffff88810d997000
RBP: 0000000000000020 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: e668264dc84383e6 R12: 0000000000000000
R13: 00000000ffffff9c R14: ffffffffffffffd9 R15: ffffffffffffff8c
FS:  00007f6f06b19700(0000) GS:ffff88812c100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001590004 CR3: 000000010da8c000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_rmdir+0xc1/0x1f0 fs/namei.c:3773
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45ce79
Code: Bad RIP value.
RSP: 002b:00007f6f06b18c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 00000000000260c0 RCX: 000000000045ce79
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200000c0
RBP: 000000000118bff0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bfcc
R13: 00007ffe9ccf70ff R14: 00007f6f06b199c0 R15: 000000000118bfcc
Modules linked in:
---[ end trace 102eac94055114de ]---
RIP: 0010:putname+0x45/0x50 fs/namei.c:250
Code: db 1d 03 48 39 d6 74 16 48 89 fb 48 89 c7 e8 82 53 fb ff 48 89 df 5b e9 e9 4f fb ff 5b c3 5b 48 89 fe 48 89 c7 e9 6b 53 fb ff <0f> 0b 66 0f 1f 84 00 00 00 00 00 41 56 41 55 41 89 f5 41 54 49 89
RSP: 0018:ffffc90002e43ec8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88810d997000 RCX: ffffc90002e43e4c
RDX: 0000000000000000 RSI: ffffffff842e0540 RDI: ffff88810d997000
RBP: 0000000000000020 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: e668264dc84383e6 R12: 0000000000000000
R13: 00000000ffffff9c R14: ffffffffffffffd9 R15: ffffffffffffff8c
FS:  00007f6f06b19700(0000) GS:ffff88812c100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000245db18 CR3: 000000010da8c000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400