[ 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 '10.128.10.19' (ECDSA) to the list of known hosts. syzkaller login: [ 43.345814][ T6822] IPVS: ftp: loaded support on port[0] = 21 executing program [ 44.439963][ T6822] INFO: trying to register non-static key. [ 44.445813][ T6822] the code is fine but needs lockdep annotation. [ 44.452136][ T6822] turning off the locking correctness validator. [ 44.458479][ T6822] CPU: 0 PID: 6822 Comm: syz-executor604 Not tainted 5.8.0-syzkaller #0 [ 44.466786][ T6822] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.476829][ T6822] Call Trace: [ 44.480110][ T6822] dump_stack+0x1f0/0x31e [ 44.484436][ T6822] register_lock_class+0xf06/0x1520 [ 44.489628][ T6822] ? lock_is_held_type+0x87/0xe0 [ 44.494554][ T6822] __lock_acquire+0x102/0x2c30 [ 44.499351][ T6822] ? mark_lock+0x102/0x1b00 [ 44.503872][ T6822] ? preempt_schedule_notrace_thunk+0x16/0x31 [ 44.509929][ T6822] lock_acquire+0x160/0x720 [ 44.514423][ T6822] ? skb_queue_purge+0x2e/0x1c0 [ 44.519323][ T6822] ? lockdep_hardirqs_on_prepare+0x425/0x6e0 [ 44.525277][ T6822] ? queue_delayed_work_on+0x149/0x1b0 [ 44.530831][ T6822] _raw_spin_lock_irqsave+0x9e/0xc0 [ 44.536017][ T6822] ? skb_queue_purge+0x2e/0x1c0 [ 44.540835][ T6822] skb_queue_purge+0x2e/0x1c0 [ 44.545485][ T6822] l2cap_conn_del+0x3de/0x650 [ 44.550132][ T6822] ? l2cap_connect_cfm+0x12b0/0x12b0 [ 44.555404][ T6822] hci_conn_hash_flush+0x127/0x200 [ 44.560486][ T6822] hci_dev_do_close+0xb7b/0x1040 [ 44.565393][ T6822] ? hci_unregister_dev+0x159/0x1590 [ 44.570673][ T6822] hci_unregister_dev+0x16d/0x1590 [ 44.575759][ T6822] ? vhci_open+0x290/0x290 [ 44.580140][ T6822] vhci_release+0x73/0xc0 [ 44.584456][ T6822] __fput+0x2f0/0x750 [ 44.588409][ T6822] task_work_run+0x137/0x1c0 [ 44.592967][ T6822] do_exit+0x601/0x1f80 [ 44.597092][ T6822] do_group_exit+0x161/0x2d0 [ 44.601763][ T6822] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 44.607974][ T6822] __do_sys_exit_group+0x13/0x20 [ 44.612884][ T6822] __se_sys_exit_group+0x10/0x10 [ 44.617793][ T6822] __x64_sys_exit_group+0x37/0x40 [ 44.622789][ T6822] do_syscall_64+0x73/0xe0 [ 44.627193][ T6822] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 44.633055][ T6822] RIP: 0033:0x445048 [ 44.636961][ T6822] Code: Bad RIP value. [ 44.640995][ T6822] RSP: 002b:00007ffdfcc18078 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 44.649388][ T6822] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000445048 [ 44.657333][ T6822] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001 [ 44.665294][ T6822] RBP: 00000000004cce70 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 44.673236][ T6822] R10: 00007fae95b4a9d0 R11: 0000000000000246 R12: 0000000000000001 [ 44.681194][ T6822] R13: 00000000006e0200 R14: 000000000233a850 R15: 0000000000000001