[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Load/Save RF Kill Switch Status.
[  OK  ] Started Update UTMP about System Runlevel Changes.

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.189' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   27.659919] INFO: trying to register non-static key.
[   27.665026] the code is fine but needs lockdep annotation.
[   27.670617] turning off the locking correctness validator.
[   27.676214] CPU: 0 PID: 7951 Comm: syz-executor314 Not tainted 4.14.277-syzkaller #0
[   27.684060] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   27.693386] Call Trace:
[   27.695948]  dump_stack+0x1b2/0x281
[   27.699551]  register_lock_class+0x389/0x1180
[   27.704021]  ? static_obj+0x50/0x50
[   27.707620]  ? save_trace+0xd6/0x290
[   27.711315]  __lock_acquire+0x167/0x3f20
[   27.715358]  ? cpuacct_charge+0x1ca/0x350
[   27.719479]  ? __lock_acquire+0x5fc/0x3f20
[   27.723686]  ? trace_hardirqs_on+0x10/0x10
[   27.727899]  ? __lock_acquire+0x2190/0x3f20
[   27.732200]  ? trace_hardirqs_on+0x10/0x10
[   27.736418]  lock_acquire+0x170/0x3f0
[   27.740198]  ? flush_work+0x88/0x770
[   27.743888]  ? finish_task_switch+0x178/0x610
[   27.748356]  flush_work+0xad/0x770
[   27.751874]  ? flush_work+0x88/0x770
[   27.755571]  ? worker_thread+0xff0/0xff0
[   27.759606]  ? trace_hardirqs_on_caller+0x3a8/0x580
[   27.764595]  ? _raw_spin_unlock_irq+0x5a/0x80
[   27.769061]  ? finish_task_switch+0x178/0x610
[   27.773533]  ? finish_task_switch+0x14d/0x610
[   27.778003]  ? mark_held_locks+0xa6/0xf0
[   27.782036]  ? __cancel_work_timer+0x2c1/0x460
[   27.786593]  __cancel_work_timer+0x321/0x460
[   27.790976]  ? work_on_cpu_safe+0x70/0x70
[   27.795099]  ? ___preempt_schedule+0x16/0x18
[   27.799485]  ? preempt_schedule_common+0x45/0xc0
[   27.804212]  ? ___preempt_schedule+0x16/0x18
[   27.808595]  ? smc_accept_dequeue+0x382/0x5c0
[   27.813065]  smc_close_active+0x7e2/0xbb0
[   27.817187]  smc_release+0x3e1/0x5d0
[   27.820890]  __sock_release+0xcd/0x2b0
[   27.824750]  ? __sock_release+0x2b0/0x2b0
[   27.828869]  sock_close+0x15/0x20
[   27.832300]  __fput+0x25f/0x7a0
[   27.835551]  task_work_run+0x11f/0x190
[   27.839412]  do_exit+0xa44/0x2850
[   27.842851]  ? __do_page_fault+0x571/0xad0
[   27.847055]  ? mm_update_next_owner+0x5b0/0x5b0
[   27.851702]  ? lock_downgrade+0x740/0x740
[   27.855824]  do_group_exit+0x100/0x2e0
[   27.859686]  SyS_exit_group+0x19/0x20
[   27.863460]  ? do_group_exit+0x2e0/0x2e0
[   27.867492]  do_syscall_64+0x1d5/0x640
[   27.871468]  entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   27.876626] RIP: 0033:0x7f76b6fa7b79
[   27.880311] RSP: 002b:00007fff241cb0d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   27.887987] RAX: ffffffffffffffda RBX: 00007f76b701b270 RCX: 00007f76b6fa7b79
[   27.895242] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
[   27.902484] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000000
[   27.909723] R