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


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.91' (ECDSA) to the list of known hosts.
syzkaller login: [   66.788539][ T6832] IPVS: ftp: loaded support on port[0] = 21
executing program
[   66.869061][  T628] tipc: TX() has been purged, node left!
[   66.877460][ T6832] INFO: trying to register non-static key.
[   66.883272][ T6832] the code is fine but needs lockdep annotation.
[   66.889612][ T6832] turning off the locking correctness validator.
[   66.895974][ T6832] CPU: 1 PID: 6832 Comm: syz-executor748 Not tainted 5.9.0-rc2-next-20200827-syzkaller #0
[   66.906008][ T6832] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   66.916062][ T6832] Call Trace:
[   66.919368][ T6832]  dump_stack+0x18f/0x20d
[   66.923701][ T6832]  register_lock_class+0x157d/0x1630
[   66.928985][ T6832]  ? lock_is_held_type+0xbb/0xf0
[   66.933914][ T6832]  ? is_dynamic_key+0x1a0/0x1a0
[   66.938761][ T6832]  ? find_held_lock+0x2d/0x110
[   66.943521][ T6832]  ? try_to_wake_up+0x57e/0x12b0
[   66.948453][ T6832]  __lock_acquire+0xf9/0x5640
[   66.953149][ T6832]  ? lockdep_hardirqs_off+0x89/0xc0
[   66.958371][ T6832]  ? trace_hardirqs_off+0x27/0x210
[   66.963502][ T6832]  ? __queue_work+0x61a/0xf20
[   66.968184][ T6832]  ? preempt_schedule_notrace_thunk+0x16/0x31
[   66.974253][ T6832]  ? lockdep_hardirqs_on_prepare+0x530/0x530
[   66.980241][ T6832]  ? find_held_lock+0x2d/0x110
[   66.985008][ T6832]  ? __queue_work+0x61a/0xf20
[   66.989693][ T6832]  lock_acquire+0x1f1/0xad0
[   66.994194][ T6832]  ? skb_dequeue+0x1c/0x180
[   66.998778][ T6832]  ? lock_release+0x8e0/0x8e0
[   67.003450][ T6832]  ? mark_lock+0xbc/0x1710
[   67.007862][ T6832]  ? __queue_work+0x63c/0xf20
[   67.012541][ T6832]  ? mark_held_locks+0x9f/0xe0
[   67.017319][ T6832]  _raw_spin_lock_irqsave+0x8c/0xc0
[   67.022543][ T6832]  ? skb_dequeue+0x1c/0x180
[   67.027043][ T6832]  skb_dequeue+0x1c/0x180
[   67.031375][ T6832]  skb_queue_purge+0x21/0x30
[   67.035967][ T6832]  l2cap_chan_del+0x61d/0x1300
[   67.041882][ T6832]  l2cap_conn_del+0x46a/0x9e0
[   67.046569][ T6832]  ? l2cap_conn_del+0x9e0/0x9e0
[   67.051423][ T6832]  l2cap_disconn_cfm+0x85/0xa0
[   67.056188][ T6832]  hci_conn_hash_flush+0x114/0x220
[   67.061302][ T6832]  hci_dev_do_close+0x5c6/0x1080
[   67.066244][ T6832]  ? hci_dev_open+0x350/0x350
[   67.071363][ T6832]  ? do_raw_read_unlock+0x70/0x70
[   67.076383][ T6832]  ? try_to_grab_pending.part.0+0x7d0/0x7d0
[   67.082282][ T6832]  hci_unregister_dev+0x1bd/0xe30
[   67.087306][ T6832]  ? fcntl_setlk+0xf60/0xf60
[   67.091905][ T6832]  ? lock_is_held_type+0xbb/0xf0
[   67.096841][ T6832]  vhci_release+0x70/0xe0
[   67.101191][ T6832]  __fput+0x285/0x920
[   67.105167][ T6832]  ? vhci_close_dev+0x50/0x50
[   67.109838][ T6832]  task_work_run+0xdd/0x190
[   67.114335][ T6832]  do_exit+0xb7d/0x29f0
[   67.118502][ T6832]  ? mm_update_next_owner+0x7a0/0x7a0
[   67.123888][ T6832]  ? hrtimer_interrupt+0x6ea/0x930
[   67.129028][ T6832]  ? lock_is_held_type+0xbb/0xf0
[   67.134750][ T6832]  do_group_exit+0x125/0x310
[   67.140058][ T6832]  __x64_sys_exit_group+0x3a/0x50
[   67.145093][ T6832]  do_syscall_64+0x2d/0x70
[   67.149511][ T6832]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   67.155582][ T6832] RIP: 0033:0x445068
[   67.159636][ T6832] Code: Bad RIP value.
[   67.164052][ T6832] RSP: 002b:00007ffde94ce288 EFLAGS: 00000246 ORIG_R