[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.52' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 62.051018][ T6853] IPVS: ftp: loaded support on port[0] = 21 [ 62.119660][ T388] tipc: TX() has been purged, node left! [ 62.125862][ T6853] INFO: trying to register non-static key. [ 62.131669][ T6853] the code is fine but needs lockdep annotation. [ 62.137979][ T6853] turning off the locking correctness validator. [ 62.144290][ T6853] CPU: 0 PID: 6853 Comm: syz-executor610 Not tainted 5.9.0-rc2-syzkaller #0 [ 62.153023][ T6853] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.163071][ T6853] Call Trace: [ 62.166349][ T6853] dump_stack+0x18f/0x20d [ 62.170667][ T6853] register_lock_class+0x157d/0x1630 [ 62.175934][ T6853] ? lock_acquire+0x1f1/0xad0 [ 62.180595][ T6853] ? find_held_lock+0x2d/0x110 [ 62.185341][ T6853] ? is_dynamic_key+0x1a0/0x1a0 [ 62.190181][ T6853] __lock_acquire+0xf9/0x5640 [ 62.194846][ T6853] ? trace_hardirqs_on+0x5f/0x220 [ 62.199852][ T6853] ? _raw_spin_unlock_irq+0x55/0x80 [ 62.205035][ T6853] ? finish_task_switch+0x147/0x750 [ 62.210218][ T6853] ? finish_task_switch+0x119/0x750 [ 62.215398][ T6853] ? __switch_to+0x425/0xfe0 [ 62.219972][ T6853] ? lock_is_held_type+0xbb/0xf0 [ 62.224896][ T6853] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 62.230859][ T6853] ? __schedule+0x8ed/0x21e0 [ 62.235458][ T6853] ? mark_lock+0xbc/0x1710 [ 62.239873][ T6853] lock_acquire+0x1f1/0xad0 [ 62.244379][ T6853] ? skb_dequeue+0x1c/0x180 [ 62.248866][ T6853] ? lock_release+0x8e0/0x8e0 [ 62.253546][ T6853] ? trace_hardirqs_on+0x5f/0x220 [ 62.258555][ T6853] ? lockdep_hardirqs_on+0x76/0xf0 [ 62.263648][ T6853] ? asm_sysvec_call_function_single+0x12/0x20 [ 62.269872][ T6853] _raw_spin_lock_irqsave+0x8c/0xc0 [ 62.275139][ T6853] ? skb_dequeue+0x1c/0x180 [ 62.279625][ T6853] skb_dequeue+0x1c/0x180 [ 62.283935][ T6853] skb_queue_purge+0x21/0x30 [ 62.288536][ T6853] l2cap_chan_del+0x61d/0x1300 [ 62.293288][ T6853] l2cap_conn_del+0x46a/0x9e0 [ 62.297951][ T6853] ? l2cap_conn_del+0x9e0/0x9e0 [ 62.302785][ T6853] l2cap_disconn_cfm+0x85/0xa0 [ 62.307536][ T6853] hci_conn_hash_flush+0x114/0x220 [ 62.312636][ T6853] hci_dev_do_close+0x5c6/0x1080 [ 62.317576][ T6853] ? hci_dev_open+0x350/0x350 [ 62.322235][ T6853] ? do_raw_read_unlock+0x70/0x70 [ 62.327249][ T6853] ? try_to_grab_pending.part.0+0x7d0/0x7d0 [ 62.333126][ T6853] hci_unregister_dev+0x1bd/0xe30 [ 62.338133][ T6853] ? fcntl_setlk+0xf60/0xf60 [ 62.342708][ T6853] ? lock_is_held_type+0xbb/0xf0 [ 62.347632][ T6853] vhci_release+0x70/0xe0 [ 62.351943][ T6853] __fput+0x285/0x920 [ 62.355909][ T6853] ? vhci_close_dev+0x50/0x50 [ 62.360568][ T6853] task_work_run+0xdd/0x190 [ 62.365054][ T6853] do_exit+0xb7d/0x29f0 [ 62.369194][ T6853] ? __mutex_unlock_slowpath+0xe2/0x610 [ 62.374721][ T6853] ? mm_update_next_owner+0x7a0/0x7a0 [ 62.380076][ T6853] ? lock_is_held_type+0xbb/0xf0 [ 62.385010][ T6853] ? lock_is_held_type+0xbb/0xf0 [ 62.389930][ T6853] do_group_exit+0x125/0x310 [ 62.394506][ T6853] __x64_sys_exit_group+0x3a/0x50 [ 62.399522][ T6853] do_syscall_64+0x2d/0x70 [ 62.403921][ T6853] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 62.409794][ T6853] RIP: 0033:0x445068 [ 62.413664][ T6853] Code: Bad RIP value. [ 62.417710][ T6853] RSP: 002b:00007ff