Warning: Permanently added '10.128.0.227' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   36.836818] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000)
[   36.854690] ------------[ cut here ]------------
[   36.860482] WARNING: CPU: 0 PID: 8136 at fs/inode.c:286 drop_nlink.cold+0x11/0x41
[   36.868103] Kernel panic - not syncing: panic_on_warn set ...
[   36.868103] 
[   36.875469] CPU: 0 PID: 8136 Comm: syz-executor014 Not tainted 4.19.211-syzkaller #0
[   36.883338] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   36.892669] Call Trace:
[   36.895243]  dump_stack+0x1fc/0x2ef
[   36.898862]  panic+0x26a/0x50e
[   36.902033]  ? __warn_printk+0xf3/0xf3
[   36.905904]  ? drop_nlink.cold+0x11/0x41
[   36.909944]  ? __probe_kernel_read+0x130/0x1b0
[   36.914520]  ? __warn.cold+0x5/0x5a
[   36.918125]  ? __warn+0xe4/0x200
[   36.921471]  ? drop_nlink.cold+0x11/0x41
[   36.925511]  __warn.cold+0x20/0x5a
[   36.929028]  ? drop_nlink.cold+0x11/0x41
[   36.933072]  report_bug+0x262/0x2b0
[   36.936681]  do_error_trap+0x1d7/0x310
[   36.940550]  ? math_error+0x310/0x310
[   36.944343]  ? __irq_work_queue_local+0x101/0x160
[   36.949167]  ? irq_work_queue+0x29/0x80
[   36.953125]  ? error_entry+0x72/0xd0
[   36.956820]  ? trace_hardirqs_off_caller+0x6e/0x210
[   36.961820]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   36.966646]  invalid_op+0x14/0x20
[   36.970078] RIP: 0010:drop_nlink.cold+0x11/0x41
[   36.974729] Code: f9 e8 9c bd 6d f9 48 c7 c7 80 a8 74 88 e8 fb ee fe ff 0f 0b e9 9f 50 b4 f9 e8 84 bd 6d f9 48 c7 c7 80 b0 74 88 e8 e3 ee fe ff <0f> 0b b8 ff ff 37 00 4c 89 e2 48 c1 ea 03 48 c1 e0 2a 0f b6 04 02
[   36.993610] RSP: 0018:ffff888094cef9e8 EFLAGS: 00010282
[   36.998955] RAX: 0000000000000024 RBX: 0000000000000000 RCX: 0000000000000000
[   37.006201] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed101299df2f
[   37.013451] RBP: ffff88808b43bbc0 R08: 0000000000000024 R09: 0000000000000000
[   37.020698] R10: 0000000000000005 R11: 0000000000000000 R12: ffff88808b43bc08
[   37.027954] R13: ffff88808b43bbc0 R14: ffff88808b43b670 R15: 0000000000000000
[   37.035215]  ? vprintk_func+0x81/0x180
[   37.039093]  ? drop_nlink.cold+0x11/0x41
[   37.043145]  udf_rename+0x4b1/0x1270
[   37.046840]  ? udf_unlink+0x420/0x420
[   37.050620]  ? mark_held_locks+0xf0/0xf0
[   37.054657]  ? mark_held_locks+0xf0/0xf0
[   37.058703]  ? __lock_acquire+0x6de/0x3ff0
[   37.062920]  ? take_dentry_name_snapshot+0x9e/0x140
[   37.067918]  ? lock_acquire+0x170/0x3c0
[   37.072057]  ? down_write_nested+0x36/0x90
[   37.076275]  vfs_rename+0x67e/0x1bc0
[   37.079972]  ? path_openat+0x2df0/0x2df0
[   37.084016]  ? security_path_rename+0x1ed/0x2e0
[   37.088663]  do_renameat2+0xb59/0xc70
[   37.092447]  ? do_mknodat.part.0+0x480/0x480
[   37.096841]  ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe
[   37.102183]  __x64_sys_renameat+0x96/0x100
[   37.106399]  ? lockdep_hardirqs_on+0x3a8/0x5c0
[   37.110971]  do_syscall_64+0xf9/0x620
[   37.114756]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   37.119923] RIP: 0033:0x7fe762fe94b9
[   37.123615] 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 c0 ff ff ff f7 d8 64 89 01 48
[   37.142496] RSP: 002b:00007fff4c6e3f18 EFLAGS: 00000246 ORIG_RAX: 0000000000000108
[   37.150205] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007fe762fe94b9
[   37.157452] RDX: 0000000000000004 RSI: 0000000020000180 RDI: 0000000000000005
[   37.164713] RBP: 00007fe762fa8d50 R08: 0000000000000000 R09: 0000000000000000
[   37.171960] R10: 00000000200001c0 R11: 0000000000000246 R12: 00007fe762fa8de0
[   37.179206] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   37.186759] Kernel Offset: disabled
[   37.190415] Rebooting in 86400 seconds..