Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.125' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   28.418654] overlayfs: fs on './file0' does not support file handles, falling back to index=off.
[   28.430359] audit: type=1804 audit(1648661503.876:2): pid=7975 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor245" name="/root/bus/bus/file0" dev="sda1" ino=13863 res=1
[   28.437406] ------------[ cut here ]------------
[   28.454387] WARNING: CPU: 0 PID: 7975 at fs/inode.c:285 drop_nlink+0x7d/0xd0
[   28.461568] Kernel panic - not syncing: panic_on_warn set ...
[   28.461568] 
[   28.468933] CPU: 0 PID: 7975 Comm: syz-executor245 Not tainted 4.14.274-syzkaller #0
[   28.476804] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   28.486157] Call Trace:
[   28.488788]  dump_stack+0x1b2/0x281
[   28.492403]  panic+0x1f9/0x42d
[   28.495575]  ? add_taint.cold+0x16/0x16
[   28.499562]  ? drop_nlink+0x7d/0xd0
[   28.503172]  ? drop_nlink+0x7d/0xd0
[   28.506807]  __warn.cold+0x20/0x44
[   28.510352]  ? ist_end_non_atomic+0x10/0x10
[   28.514718]  ? drop_nlink+0x7d/0xd0
[   28.518341]  report_bug+0x208/0x250
[   28.521969]  do_error_trap+0x195/0x2d0
[   28.525836]  ? math_error+0x2d0/0x2d0
[   28.529617]  ? debug_object_free+0x320/0x320
[   28.534010]  ? unlock_rename+0x9e/0xc0
[   28.537898]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   28.542865]  invalid_op+0x1b/0x40
[   28.546328] RIP: 0010:drop_nlink+0x7d/0xd0
[   28.550561] RSP: 0018:ffff8880a2f1fce8 EFLAGS: 00010297
[   28.555930] RAX: ffff8880b4456400 RBX: ffff88808de640a0 RCX: 0000000000000000
[   28.563185] RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffff88808de640a0
[   28.570445] RBP: 00000000ffffffff R08: ffff8880b4456400 R09: dffffc0000000000
[   28.577831] R10: 0000000000000000 R11: ffff8880b4456400 R12: ffff88808de640e8
[   28.585355] R13: ffff88808e0ce9e0 R14: 0000000000000000 R15: 1ffff110145e3fa9
[   28.592845]  ? drop_nlink+0x7d/0xd0
[   28.596457]  ovl_do_remove+0x5d6/0xb90
[   28.600401]  ? ovl_rename+0xe50/0xe50
[   28.604387]  vfs_unlink+0x230/0x470
[   28.608011]  do_unlinkat+0x30c/0x5c0
[   28.611732]  ? do_rmdir+0x3c0/0x3c0
[   28.615359]  ? mntput+0x5c/0x80
[   28.618622]  ? SyS_chdir+0x10d/0x1a0
[   28.622323]  ? SyS_access+0x20/0x20
[   28.625940]  ? do_syscall_64+0x4c/0x640
[   28.629894]  ? SyS_unlinkat+0x70/0x70
[   28.633678]  do_syscall_64+0x1d5/0x640
[   28.637554]  entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   28.643174] RIP: 0033:0x7fc219306f99
[   28.646870] RSP: 002b:00007ffe1204dae8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
[   28.654668] RAX: ffffffffffffffda RBX: 00007ffe1204daf8 RCX: 00007fc219306f99
[   28.662201] RDX: 00007fc219306f99 RSI: 9dbfb66565a7039d RDI: 0000000020000540
[   28.669559] RBP: 00007ffe1204daf0 R08: 00007fc2192c54f0 R09: 00007fc2192c54f0
[   28.676949] R10: 00007fc2192c54f0 R11: 0000000000000246 R12: 0000000000000000
[   28.684224] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   28.691988] Kernel Offset: disabled
[   28.695664] Rebooting in 86400 seconds..