Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.1.35' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   27.809188] INFO: trying to register non-static key.
[   27.814455] the code is fine but needs lockdep annotation.
[   27.820059] turning off the locking correctness validator.
[   27.825770] CPU: 0 PID: 7985 Comm: syz-executor219 Not tainted 4.14.241-syzkaller #0
[   27.833734] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   27.843249] Call Trace:
[   27.845841]  dump_stack+0x1b2/0x281
[   27.849447]  register_lock_class+0x32b/0x1320
[   27.854022]  ? static_obj+0x50/0x50
[   27.857647]  ? save_trace+0xd6/0x290
[   27.861424]  __lock_acquire+0x167/0x3f20
[   27.865656]  ? cpuacct_charge+0x1ca/0x350
[   27.869789]  ? __lock_acquire+0x5fc/0x3f20
[   27.874003]  ? trace_hardirqs_on+0x10/0x10
[   27.878211]  ? __lock_acquire+0x5fc/0x3f20
[   27.882423]  ? trace_hardirqs_on+0x10/0x10
[   27.886635]  lock_acquire+0x170/0x3f0
[   27.890516]  ? flush_work+0x88/0x770
[   27.894209]  ? finish_task_switch+0x178/0x610
[   27.898775]  flush_work+0xad/0x770
[   27.902310]  ? flush_work+0x88/0x770
[   27.906015]  ? worker_thread+0xff0/0xff0
[   27.910157]  ? trace_hardirqs_on_caller+0x3a8/0x580
[   27.915159]  ? _raw_spin_unlock_irq+0x5a/0x80
[   27.919846]  ? finish_task_switch+0x178/0x610
[   27.924320]  ? finish_task_switch+0x14d/0x610
[   27.928802]  ? mark_held_locks+0xa6/0xf0
[   27.932845]  ? __cancel_work_timer+0x2c1/0x460
[   27.937534]  __cancel_work_timer+0x321/0x460
[   27.941930]  ? work_on_cpu_safe+0x70/0x70
[   27.946086]  ? ___preempt_schedule+0x16/0x18
[   27.950574]  ? preempt_schedule_common+0x45/0xc0
[   27.955313]  ? ___preempt_schedule+0x16/0x18
[   27.959702]  ? smc_accept_dequeue+0x382/0x5c0
[   27.964244]  smc_close_active+0x768/0xb20
[   27.968508]  smc_release+0x3e1/0x5d0
[   27.972205]  __sock_release+0xcd/0x2b0
[   27.976183]  ? __sock_release+0x2b0/0x2b0
[   27.980303]  sock_close+0x15/0x20
[   27.983732]  __fput+0x25f/0x7a0
[   27.987006]  task_work_run+0x11f/0x190
[   27.990888]  do_exit+0xa44/0x2850
[   27.994342]  ? __do_page_fault+0x571/0xad0
[   27.998559]  ? mm_update_next_owner+0x5b0/0x5b0
[   28.003226]  ? lock_downgrade+0x740/0x740
[   28.007507]  do_group_exit+0x100/0x2e0
[   28.011394]  SyS_exit_group+0x19/0x20
[   28.015286]  ? do_group_exit+0x2e0/0x2e0
[   28.019525]  do_syscall_64+0x1d5/0x640
[   28.023392]  entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   28.028559] RIP: 0033:0x43d9e9
[   28.031809] RSP: 002b:00007fff2c43b2b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   28.039687] RAX: ffffffffffffffda RBX: 00000000004ae230 RCX: 000000000043d9e9
[   28.046931] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
[   28.054190] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 000