[ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ 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 '10.128.0.249' (ECDSA) to the list of known hosts. syzkaller login: [ 63.186630][ T6885] IPVS: ftp: loaded support on port[0] = 21 executing program [ 63.299584][ T6885] INFO: trying to register non-static key. [ 63.305414][ T6885] the code is fine but needs lockdep annotation. [ 63.311709][ T6885] turning off the locking correctness validator. [ 63.318009][ T6885] CPU: 0 PID: 6885 Comm: syz-executor280 Not tainted 5.9.0-rc2-syzkaller #0 [ 63.326646][ T6885] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.336816][ T6885] Call Trace: [ 63.340089][ T6885] dump_stack+0x18f/0x20d [ 63.344396][ T6885] register_lock_class+0x157d/0x1630 [ 63.349655][ T6885] ? lock_is_held_type+0xbb/0xf0 [ 63.354577][ T6885] ? is_dynamic_key+0x1a0/0x1a0 [ 63.359405][ T6885] ? find_held_lock+0x2d/0x110 [ 63.364140][ T6885] ? try_to_wake_up+0x57e/0x12b0 [ 63.369049][ T6885] __lock_acquire+0xf9/0x5640 [ 63.373700][ T6885] ? lockdep_hardirqs_off+0x89/0xc0 [ 63.378879][ T6885] ? trace_hardirqs_off+0x27/0x210 [ 63.383966][ T6885] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 63.389742][ T6885] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 63.395690][ T6885] ? find_held_lock+0x2d/0x110 [ 63.400425][ T6885] ? __queue_work+0x61a/0xf20 [ 63.405071][ T6885] lock_acquire+0x1f1/0xad0 [ 63.409560][ T6885] ? skb_dequeue+0x1c/0x180 [ 63.414033][ T6885] ? lock_release+0x8e0/0x8e0 [ 63.418682][ T6885] ? mark_lock+0xbc/0x1710 [ 63.423070][ T6885] ? __queue_work+0x63c/0xf20 [ 63.427720][ T6885] ? mark_held_locks+0x9f/0xe0 [ 63.432455][ T6885] _raw_spin_lock_irqsave+0x8c/0xc0 [ 63.437625][ T6885] ? skb_dequeue+0x1c/0x180 [ 63.442130][ T6885] skb_dequeue+0x1c/0x180 [ 63.446429][ T6885] skb_queue_purge+0x21/0x30 [ 63.451007][ T6885] l2cap_chan_del+0x61d/0x1300 [ 63.455740][ T6885] l2cap_conn_del+0x46a/0x9e0 [ 63.460387][ T6885] ? l2cap_conn_del+0x9e0/0x9e0 [ 63.465226][ T6885] l2cap_disconn_cfm+0x85/0xa0 [ 63.469962][ T6885] hci_conn_hash_flush+0x114/0x220 [ 63.475045][ T6885] hci_dev_do_close+0x5c6/0x1080 [ 63.479955][ T6885] ? hci_dev_open+0x350/0x350 [ 63.484603][ T6885] ? do_raw_read_unlock+0x70/0x70 [ 63.489597][ T6885] ? try_to_grab_pending.part.0+0x7d0/0x7d0 [ 63.495458][ T6885] hci_unregister_dev+0x1bd/0xe30 [ 63.500451][ T6885] ? fcntl_setlk+0xf60/0xf60 [ 63.505014][ T6885] ? lock_is_held_type+0xbb/0xf0 [ 63.509938][ T6885] vhci_release+0x70/0xe0 [ 63.514253][ T6885] __fput+0x285/0x920 [ 63.518225][ T6885] ? vhci_close_dev+0x50/0x50 [ 63.522873][ T6885] task_work_run+0xdd/0x190 [ 63.527365][ T6885] do_exit+0xb7d/0x29f0 [ 63.531491][ T6885] ? mm_update_next_owner+0x7a0/0x7a0 [ 63.536835][ T6885] ? __sb_end_write+0xf8/0x1d0 [ 63.541572][ T6885] ? vfs_write+0x1b0/0x730 [ 63.545978][ T6885] ? lock_is_held_type+0xbb/0xf0 [ 63.550905][ T6885] do_group_exit+0x125/0x310 [ 63.555464][ T6885] __x64_sys_exit_group+0x3a/0x50 [ 63.560476][ T6885] do_syscall_64+0x2d/0x70 [ 63.564867][ T6885] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.570726][ T6885] RIP: 0033:0x445068 [ 63.574583][ T6885] Code: Bad RIP value. [ 63.578616][ T6885] RSP: 002b:00007ffecffeb1b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 63.587006][ T6885] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000445068 [ 63.594960][ T6885] RDX: 0000000000000001 RSI: 000000000000003c RDI: