[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.30' (ECDSA) to the list of known hosts. syzkaller login: [ 64.418899][ T6828] IPVS: ftp: loaded support on port[0] = 21 executing program [ 64.526163][ T6828] INFO: trying to register non-static key. [ 64.532135][ T6828] the code is fine but needs lockdep annotation. [ 64.538446][ T6828] turning off the locking correctness validator. [ 64.544779][ T6828] CPU: 0 PID: 6828 Comm: syz-executor080 Not tainted 5.9.0-rc2-syzkaller #0 [ 64.553444][ T6828] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.563475][ T6828] Call Trace: [ 64.566745][ T6828] dump_stack+0x18f/0x20d [ 64.571052][ T6828] register_lock_class+0x157d/0x1630 [ 64.576313][ T6828] ? lock_is_held_type+0xbb/0xf0 [ 64.581270][ T6828] ? is_dynamic_key+0x1a0/0x1a0 [ 64.586096][ T6828] ? find_held_lock+0x2d/0x110 [ 64.590830][ T6828] ? try_to_wake_up+0x57e/0x12b0 [ 64.595743][ T6828] __lock_acquire+0xf9/0x5640 [ 64.600413][ T6828] ? lockdep_hardirqs_off+0x89/0xc0 [ 64.605586][ T6828] ? trace_hardirqs_off+0x27/0x210 [ 64.610679][ T6828] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 64.616476][ T6828] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 64.622428][ T6828] ? find_held_lock+0x2d/0x110 [ 64.627165][ T6828] ? __queue_work+0x61a/0xf20 [ 64.631833][ T6828] lock_acquire+0x1f1/0xad0 [ 64.636312][ T6828] ? skb_dequeue+0x1c/0x180 [ 64.640789][ T6828] ? lock_release+0x8e0/0x8e0 [ 64.645439][ T6828] ? mark_lock+0xbc/0x1710 [ 64.649828][ T6828] ? __queue_work+0x63c/0xf20 [ 64.654479][ T6828] ? mark_held_locks+0x9f/0xe0 [ 64.659239][ T6828] _raw_spin_lock_irqsave+0x8c/0xc0 [ 64.664414][ T6828] ? skb_dequeue+0x1c/0x180 [ 64.668936][ T6828] skb_dequeue+0x1c/0x180 [ 64.673242][ T6828] skb_queue_purge+0x21/0x30 [ 64.677810][ T6828] l2cap_chan_del+0x61d/0x1300 [ 64.682588][ T6828] l2cap_conn_del+0x46a/0x9e0 [ 64.687241][ T6828] ? l2cap_conn_del+0x9e0/0x9e0 [ 64.692080][ T6828] l2cap_disconn_cfm+0x85/0xa0 [ 64.696837][ T6828] hci_conn_hash_flush+0x114/0x220 [ 64.701924][ T6828] hci_dev_do_close+0x5c6/0x1080 [ 64.706881][ T6828] ? hci_dev_open+0x350/0x350 [ 64.711534][ T6828] ? do_raw_read_unlock+0x70/0x70 [ 64.716554][ T6828] ? try_to_grab_pending.part.0+0x7d0/0x7d0 [ 64.722425][ T6828] hci_unregister_dev+0x1bd/0xe30 [ 64.727424][ T6828] ? fcntl_setlk+0xf60/0xf60 [ 64.731990][ T6828] ? lock_is_held_type+0xbb/0xf0 [ 64.736916][ T6828] vhci_release+0x70/0xe0 [ 64.741234][ T6828] __fput+0x285/0x920 [ 64.745192][ T6828] ? vhci_close_dev+0x50/0x50 [ 64.749843][ T6828] task_work_run+0xdd/0x190 [ 64.754321][ T6828] do_exit+0xb7d/0x29f0 [ 64.758508][ T6828] ? __mutex_unlock_slowpath+0xe2/0x610 [ 64.764040][ T6828] ? mm_update_next_owner+0x7a0/0x7a0 [ 64.769389][ T6828] ? vfs_write+0x1b0/0x730 [ 64.773783][ T6828] ? lock_is_held_type+0xbb/0xf0 [ 64.778703][ T6828] do_group_exit+0x125/0x310 [ 64.783265][ T6828] __x64_sys_exit_group+0x3a/0x50 [ 64.788281][ T6828] do_syscall_64+0x2d/0x70 [ 64.792669][ T6828] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.798551][ T6828] RIP: 0033:0x445068 [ 64.802414][ T6828] Code: Bad RIP value. [ 64.806471][ T6828] RSP: 002b:00007fff4c4b03b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 64.814856][ T6828] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000445068 [ 64.822815][ T6828] RDX: 0000000000000001 RSI: 00000