[ 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 tty1. [ 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 '10.128.0.125' (ECDSA) to the list of known hosts. syzkaller login: [ 65.515870][ T6857] IPVS: ftp: loaded support on port[0] = 21 executing program [ 65.614195][ T6857] INFO: trying to register non-static key. [ 65.620042][ T6857] the code is fine but needs lockdep annotation. [ 65.626357][ T6857] turning off the locking correctness validator. [ 65.632821][ T6857] CPU: 1 PID: 6857 Comm: syz-executor109 Not tainted 5.9.0-rc2-syzkaller #0 [ 65.641499][ T6857] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.651640][ T6857] Call Trace: [ 65.654934][ T6857] dump_stack+0x18f/0x20d [ 65.659252][ T6857] register_lock_class+0x157d/0x1630 [ 65.664525][ T6857] ? lock_is_held_type+0xbb/0xf0 [ 65.669445][ T6857] ? is_dynamic_key+0x1a0/0x1a0 [ 65.674277][ T6857] ? find_held_lock+0x2d/0x110 [ 65.679025][ T6857] ? try_to_wake_up+0x57e/0x12b0 [ 65.684090][ T6857] __lock_acquire+0xf9/0x5640 [ 65.688765][ T6857] ? lockdep_hardirqs_off+0x89/0xc0 [ 65.693946][ T6857] ? trace_hardirqs_off+0x27/0x210 [ 65.699042][ T6857] ? __queue_work+0x61a/0xf20 [ 65.703703][ T6857] ? preempt_schedule_notrace_thunk+0x16/0x31 [ 65.709762][ T6857] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 65.715722][ T6857] ? find_held_lock+0x2d/0x110 [ 65.721614][ T6857] ? __queue_work+0x61a/0xf20 [ 65.726288][ T6857] lock_acquire+0x1f1/0xad0 [ 65.730775][ T6857] ? skb_dequeue+0x1c/0x180 [ 65.735260][ T6857] ? lock_release+0x8e0/0x8e0 [ 65.739918][ T6857] ? mark_lock+0xbc/0x1710 [ 65.744316][ T6857] ? __queue_work+0x63c/0xf20 [ 65.748980][ T6857] ? mark_held_locks+0x9f/0xe0 [ 65.753726][ T6857] _raw_spin_lock_irqsave+0x8c/0xc0 [ 65.758909][ T6857] ? skb_dequeue+0x1c/0x180 [ 65.763393][ T6857] skb_dequeue+0x1c/0x180 [ 65.767705][ T6857] skb_queue_purge+0x21/0x30 [ 65.772296][ T6857] l2cap_chan_del+0x61d/0x1300 [ 65.777040][ T6857] l2cap_conn_del+0x46a/0x9e0 [ 65.781701][ T6857] ? l2cap_conn_del+0x9e0/0x9e0 [ 65.786532][ T6857] l2cap_disconn_cfm+0x85/0xa0 [ 65.791288][ T6857] hci_conn_hash_flush+0x114/0x220 [ 65.796386][ T6857] hci_dev_do_close+0x5c6/0x1080 [ 65.801313][ T6857] ? hci_dev_open+0x350/0x350 [ 65.805991][ T6857] ? do_raw_read_unlock+0x70/0x70 [ 65.810997][ T6857] ? try_to_grab_pending.part.0+0x7d0/0x7d0 [ 65.816872][ T6857] hci_unregister_dev+0x1bd/0xe30 [ 65.821877][ T6857] ? fcntl_setlk+0xf60/0xf60 [ 65.826450][ T6857] ? lock_is_held_type+0xbb/0xf0 [ 65.831370][ T6857] vhci_release+0x70/0xe0 [ 65.835697][ T6857] __fput+0x285/0x920 [ 65.839682][ T6857] ? vhci_close_dev+0x50/0x50 [ 65.844340][ T6857] task_work_run+0xdd/0x190 [ 65.848822][ T6857] do_exit+0xb7d/0x29f0 [ 65.852959][ T6857] ? mm_update_next_owner+0x7a0/0x7a0 [ 65.858312][ T6857] ? vmacache_update+0xce/0x140 [ 65.863161][ T6857] ? lock_is_held_type+0xbb/0xf0 [ 65.868080][ T6857] do_group_exit+0x125/0x310 [ 65.872706][ T6857] __ia32_sys_exit_group+0x3a/0x50 [ 65.877798][ T6857] __do_fast_syscall_32+0x57/0x80 [ 65.882801][ T6857] do_fast_syscall_32+0x2f/0x70 [ 65.887636][ T6857] entry_SYSENTER_compat_after_hwframe+0x4d/0x5c [ 65.893957][ T6857] RIP: 0023:0xf7f57549 [ 65.898016][ T6857] Code: Bad RIP value. [ 65.902061][ T6857] RSP: 002b:00000000fffb5eac EFLAGS: 00000292 ORIG_RAX: 00000000000000fc [ 65.910627][ T6857] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00000000080fd318 [ 65.918595][ T6857] RDX: 0000000000000000 RSI: 00000000080e3320 RDI: 00000000080fd320 [ 65.926548][ T6857] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 [ 65.934512][ T6857] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 65.942465][ T6857] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 65.964111][ T