Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.1.44' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   27.556865] ------------[ cut here ]------------
[   27.561705] WARNING: CPU: 0 PID: 7981 at fs/inode.c:342 inc_nlink+0x113/0x130
[   27.568953] Kernel panic - not syncing: panic_on_warn set ...
[   27.568953] 
[   27.576295] CPU: 0 PID: 7981 Comm: syz-executor557 Not tainted 4.14.267-syzkaller #0
[   27.584156] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   27.593499] Call Trace:
[   27.596066]  dump_stack+0x1b2/0x281
[   27.599671]  panic+0x1f9/0x42d
[   27.602840]  ? add_taint.cold+0x16/0x16
[   27.606811]  ? inc_nlink+0x113/0x130
[   27.610547]  ? inc_nlink+0x113/0x130
[   27.614256]  __warn.cold+0x20/0x44
[   27.617778]  ? ist_end_non_atomic+0x10/0x10
[   27.622099]  ? inc_nlink+0x113/0x130
[   27.625792]  report_bug+0x208/0x250
[   27.629406]  do_error_trap+0x195/0x2d0
[   27.633269]  ? math_error+0x2d0/0x2d0
[   27.637062]  ? trace_hardirqs_on+0x10/0x10
[   27.641269]  ? do_raw_spin_unlock+0x164/0x220
[   27.645748]  ? _raw_spin_unlock+0x29/0x40
[   27.649881]  ? d_instantiate_no_diralias+0xdf/0x130
[   27.654877]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   27.659700]  invalid_op+0x1b/0x40
[   27.663130] RIP: 0010:inc_nlink+0x113/0x130
[   27.667426] RSP: 0018:ffff8880b3587c80 EFLAGS: 00010297
[   27.672766] RAX: ffff8880b30b8480 RBX: ffff8880b335d680 RCX: 000000000000335f
[   27.680013] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8880b335d758
[   27.687262] RBP: 0000000000000000 R08: ffffffff8b9bc5b8 R09: 000000000004057c
[   27.694513] R10: ffff8880b30b8d80 R11: ffff8880b30b8480 R12: ffff8880b335d6c8
[   27.701760] R13: 0000000000000000 R14: ffff888095833240 R15: 0000000000000005
[   27.709019]  fuse_link+0x32c/0x4b0
[   27.712535]  ? create_new_entry.constprop.0+0x520/0x520
[   27.717882]  vfs_link+0x6d5/0xb40
[   27.721320]  SyS_linkat+0x3e5/0x6a0
[   27.724938]  ? SyS_symlink+0x30/0x30
[   27.728693]  ? do_futex+0x1570/0x1570
[   27.732473]  ? kernel_write+0x110/0x110
[   27.736424]  ? __do_page_fault+0x159/0xad0
[   27.740658]  ? do_syscall_64+0x4c/0x640
[   27.744607]  ? SyS_linkat+0x6a0/0x6a0
[   27.748398]  do_syscall_64+0x1d5/0x640
[   27.752287]  entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   27.757453] RIP: 0033:0x7f14b8561d29
[   27.761138] RSP: 002b:00007f14b84f22f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
[   27.768882] RAX: ffffffffffffffda RBX: 00007f14b85f44d0 RCX: 00007f14b8561d29
[   27.776267] RDX: 00007f14b8561d29 RSI: 0000000020000080 RDI: 0000000020000040
[   27.783519] RBP: 00007f14b85c20ec R08: 0000000000003065 R09: 0000000000000000
[   27.790765] R10: 0000000000000030 R11: 0000000000000246 R12: 00007f14b85bc0d8
[   27.798012] R13: 00007f14b85be0e0 R14: 00007f14b85c00e8 R15: 00007f14b85f44d8
[   27.805570] Kernel Offset: disabled
[   27.809246] Rebooting in 86400 seconds..