[ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.21' (ECDSA) to the list of known hosts. syzkaller login: [ 48.225347][ T6819] IPVS: ftp: loaded support on port[0] = 21 executing program [ 49.380438][ T6819] INFO: trying to register non-static key. [ 49.386285][ T6819] the code is fine but needs lockdep annotation. [ 49.392611][ T6819] turning off the locking correctness validator. [ 49.398949][ T6819] CPU: 0 PID: 6819 Comm: syz-executor370 Not tainted 5.8.0-rc7-syzkaller #0 [ 49.407612][ T6819] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.417669][ T6819] Call Trace: [ 49.420965][ T6819] dump_stack+0x1f0/0x31e [ 49.425409][ T6819] register_lock_class+0xf06/0x1520 [ 49.430675][ T6819] ? lock_is_held_type+0x87/0xe0 [ 49.435585][ T6819] __lock_acquire+0x102/0x2c30 [ 49.440434][ T6819] ? mark_lock+0x102/0x1b00 [ 49.444923][ T6819] ? preempt_schedule_notrace_thunk+0x16/0x31 [ 49.450962][ T6819] lock_acquire+0x160/0x720 [ 49.455575][ T6819] ? skb_queue_purge+0x2e/0x1c0 [ 49.460503][ T6819] ? lockdep_hardirqs_on_prepare+0x425/0x6e0 [ 49.466456][ T6819] ? queue_delayed_work_on+0x149/0x1b0 [ 49.471896][ T6819] _raw_spin_lock_irqsave+0x9e/0xc0 [ 49.477216][ T6819] ? skb_queue_purge+0x2e/0x1c0 [ 49.482049][ T6819] skb_queue_purge+0x2e/0x1c0 [ 49.486707][ T6819] l2cap_conn_del+0x3de/0x650 [ 49.491447][ T6819] ? l2cap_connect_cfm+0x12b0/0x12b0 [ 49.496800][ T6819] hci_conn_hash_flush+0x127/0x200 [ 49.501883][ T6819] hci_dev_do_close+0xb7b/0x1040 [ 49.506790][ T6819] ? hci_unregister_dev+0x159/0x1590 [ 49.512044][ T6819] hci_unregister_dev+0x16d/0x1590 [ 49.517126][ T6819] ? vhci_open+0x290/0x290 [ 49.521509][ T6819] vhci_release+0x73/0xc0 [ 49.525875][ T6819] __fput+0x2f0/0x750 [ 49.529831][ T6819] task_work_run+0x137/0x1c0 [ 49.534392][ T6819] do_exit+0x601/0x1f80 [ 49.538611][ T6819] do_group_exit+0x161/0x2d0 [ 49.543176][ T6819] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 49.549216][ T6819] __do_sys_exit_group+0x13/0x20 [ 49.554132][ T6819] __se_sys_exit_group+0x10/0x10 [ 49.559038][ T6819] __x64_sys_exit_group+0x37/0x40 [ 49.564119][ T6819] do_syscall_64+0x73/0xe0 [ 49.568516][ T6819] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 49.574405][ T6819] RIP: 0033:0x444fe8 [ 49.578276][ T6819] Code: Bad RIP value. [ 49.582473][ T6819] RSP: 002b:00007ffe95cf39a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 49.590958][ T6819] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000444fe8 [ 49.598914][ T6819] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001 [ 49.606862][ T6819] RBP: 00000000004cce10 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 49.615326][ T6819] R10: 00007fa6b64e3700 R11: 0000000000000246 R12: 0000000000000001 [ 49.623280][ T6819] R13: 00000000006e0200 R14: 00000000011eb850 R15: 0000000000000001