[ 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... 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 '10.128.1.25' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 30.263661] IPVS: ftp: loaded support on port[0] = 21 [ 32.284611] Bluetooth: hci0 command 0x0409 tx timeout [ 34.362697] Bluetooth: hci0 command 0x041b tx timeout [ 35.302124] INFO: trying to register non-static key. [ 35.307365] the code is fine but needs lockdep annotation. [ 35.312992] turning off the locking correctness validator. [ 35.318617] CPU: 0 PID: 8021 Comm: syz-executor911 Not tainted 4.14.204-syzkaller #0 [ 35.326498] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.335851] Call Trace: [ 35.338439] dump_stack+0x1b2/0x283 [ 35.342046] register_lock_class+0x32b/0x1320 [ 35.346548] ? account_entity_enqueue+0x2e5/0x440 [ 35.351377] ? static_obj+0x50/0x50 [ 35.355005] ? check_preemption_disabled+0x35/0x240 [ 35.359998] __lock_acquire+0x167/0x3f20 [ 35.364037] ? lock_downgrade+0x740/0x740 [ 35.368172] ? lock_downgrade+0x740/0x740 [ 35.372300] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 35.377384] ? trace_hardirqs_on+0x10/0x10 [ 35.381599] ? __queue_work+0x517/0xf70 [ 35.385557] ? lock_downgrade+0x740/0x740 [ 35.389684] ? do_raw_spin_unlock+0x164/0x220 [ 35.394168] lock_acquire+0x170/0x3f0 [ 35.397962] ? skb_dequeue+0x1c/0x180 [ 35.401765] _raw_spin_lock_irqsave+0x8c/0xc0 [ 35.406266] ? skb_dequeue+0x1c/0x180 [ 35.410046] skb_dequeue+0x1c/0x180 [ 35.413652] skb_queue_purge+0x21/0x30 [ 35.417517] l2cap_chan_del+0x56d/0x950 [ 35.421488] l2cap_chan_close+0x103/0x870 [ 35.425622] ? __set_monitor_timer+0x1d0/0x1d0 [ 35.430180] ? wait_for_completion_io+0x10/0x10 [ 35.434823] ? __local_bh_enable_ip+0xc1/0x170 [ 35.439393] l2cap_sock_shutdown+0x2e7/0xc20 [ 35.443782] ? do_exit+0xa03/0x27f0 [ 35.447394] ? l2cap_skb_msg_name+0x120/0x120 [ 35.451865] ? exit_to_usermode_loop+0x160/0x200 [ 35.456748] ? do_syscall_64+0x4a3/0x640 [ 35.460802] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 35.466239] ? l2cap_sock_release+0x6a/0x280 [ 35.470644] ? lock_downgrade+0x740/0x740 [ 35.474773] l2cap_sock_release+0x77/0x280 [ 35.479006] __sock_release+0xcd/0x2b0 [ 35.482872] ? __sock_release+0x2b0/0x2b0 [ 35.487000] sock_close+0x15/0x20 [ 35.490430] __fput+0x25f/0x7a0 [ 35.493694] task_work_run+0x11f/0x190 [ 35.497571] do_exit+0xa08/0x27f0 [ 35.501014] ? trace_hardirqs_on+0x10/0x10 [ 35.505240] ? mm_update_next_owner+0x5b0/0x5b0 [ 35.509882] ? get_signal+0x323/0x1ca0 [ 35.513756] ? lock_acquire+0x170/0x3f0 [ 35.517703] ? lock_downgrade+0x740/0x740 [ 35.521840] do_group_exit+0x100/0x2e0 [ 35.525716] get_signal+0x38d/0x1ca0 [ 35.529415] do_signal+0x7c/0x1550 [ 35.532939] ? __local_bh_enable_ip+0xc1/0x170 [ 35.537530] ? trace_hardirqs_on_caller+0x3a8/0x580 [ 35.542521] ? l2cap_sock_connect+0x30b/0x520 [ 35.546992] ? __local_bh_enable_ip+0xc1/0x170 [ 35.551571] ? setup_sigcontext+0x820/0x820 [ 35.555872] ? l2cap_sock_accept+0x4d0/0x4d0 [ 35.560260] ? security_socket_connect+0x83/0xb0 [ 35.565000] ? l2cap_sock_accept+0x4d0/0x4d0 [ 35.569384] ? SyS_connect+0xf6/0x240 [ 35.573173] ? SyS_accept+0x30/0x30 [ 35.576786] ? __fdget+0x167/0x1f0 [ 35.580325] ? security_socket_setsockopt+0x83/0xb0 [ 35.585333] ? SyS_setsockopt+0x130/0x1e0 [ 35.589459] ? exit_to_usermode_loop+0x41/0x200 [ 35.594973] exit_to_usermode_loop+0x160/0x200 [ 35.599547] do_syscall_64+0x4a3/0x640 [ 35.603412] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 35.609532] RIP: 0033:0x446eb9 [ 35.612695] RSP: 002b:00007ffe6633e878 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 35.620380] RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000446eb9 [ 35.628063] RDX: 000000000000000e RSI: 0000000020000080 RDI: 0000000000000004 [ 35.635325] RBP: 0000000000000003 R08: 00000000000000ff R09: 00000000000000ff [ 35.642656] R10: 000000000000000c R11: 0000000000000246 R12: 00000000018b7850 executing program [ 35.650862] R13: 0000000000000072 R14: 0000000000000000 R15: 0000000000000000 [ 36.441049] Bluetooth: hci0 command 0x040f tx timeout [ 38.519744] Bluetooth: hci0 command 0x0419 tx timeout [ 40.598695] Bluetooth: hci0 command 0x0405 tx timeout executing program