[ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.3' (ECDSA) to the list of known hosts. syzkaller login: [ 58.586938][ T6833] IPVS: ftp: loaded support on port[0] = 21 executing program [ 59.756394][ T6833] INFO: trying to register non-static key. [ 59.762220][ T6833] the code is fine but needs lockdep annotation. [ 59.768530][ T6833] turning off the locking correctness validator. [ 59.774848][ T6833] CPU: 1 PID: 6833 Comm: syz-executor596 Not tainted 5.8.0-rc7-syzkaller #0 [ 59.783504][ T6833] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.793548][ T6833] Call Trace: [ 59.796833][ T6833] dump_stack+0x18f/0x20d [ 59.801153][ T6833] register_lock_class+0x157d/0x1630 [ 59.806414][ T6833] ? lock_is_held_type+0xb0/0xe0 [ 59.811323][ T6833] ? is_dynamic_key+0x1a0/0x1a0 [ 59.816146][ T6833] ? find_held_lock+0x2d/0x110 [ 59.820883][ T6833] ? try_to_wake_up+0x57e/0x12b0 [ 59.825798][ T6833] __lock_acquire+0xfa/0x56e0 [ 59.830450][ T6833] ? lockdep_hardirqs_off+0x66/0xa0 [ 59.835619][ T6833] ? trace_hardirqs_off+0x27/0x210 [ 59.840703][ T6833] ? __queue_work+0x653/0xff0 [ 59.845352][ T6833] ? preempt_schedule_notrace_thunk+0x16/0x31 [ 59.851389][ T6833] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 59.857338][ T6833] ? find_held_lock+0x2d/0x110 [ 59.862073][ T6833] ? __queue_work+0x653/0xff0 [ 59.866720][ T6833] lock_acquire+0x1f1/0xad0 [ 59.871194][ T6833] ? skb_dequeue+0x1c/0x180 [ 59.875666][ T6833] ? lock_release+0x8d0/0x8d0 [ 59.880354][ T6833] ? mark_lock+0xbc/0x1710 [ 59.884741][ T6833] ? __queue_work+0x675/0xff0 [ 59.889389][ T6833] ? mark_held_locks+0x9f/0xe0 [ 59.894123][ T6833] ? lockdep_hardirqs_off+0x66/0xa0 [ 59.899290][ T6833] _raw_spin_lock_irqsave+0x8c/0xc0 [ 59.904457][ T6833] ? skb_dequeue+0x1c/0x180 [ 59.908929][ T6833] skb_dequeue+0x1c/0x180 [ 59.913227][ T6833] skb_queue_purge+0x21/0x30 [ 59.917789][ T6833] l2cap_chan_del+0x61d/0x1300 [ 59.922523][ T6833] l2cap_conn_del+0x46a/0x9e0 [ 59.927174][ T6833] ? l2cap_conn_del+0x9e0/0x9e0 [ 59.931996][ T6833] l2cap_disconn_cfm+0x85/0xa0 [ 59.936761][ T6833] hci_conn_hash_flush+0x114/0x220 [ 59.941845][ T6833] ? vhci_close_dev+0x50/0x50 [ 59.946492][ T6833] hci_dev_do_close+0x5c6/0x1080 [ 59.951400][ T6833] ? do_raw_write_lock+0x11a/0x280 [ 59.956482][ T6833] ? hci_dev_open+0x350/0x350 [ 59.961129][ T6833] ? do_raw_read_unlock+0x70/0x70 [ 59.966128][ T6833] ? try_to_grab_pending.part.0+0x7d0/0x7d0 [ 59.971993][ T6833] ? fsnotify_parent+0xb7/0x2b0 [ 59.976814][ T6833] ? vhci_close_dev+0x50/0x50 [ 59.981463][ T6833] hci_unregister_dev+0x1a3/0xe20 [ 59.986460][ T6833] ? fcntl_setlk+0xf60/0xf60 [ 59.991890][ T6833] ? lock_is_held_type+0xb0/0xe0 [ 59.996799][ T6833] ? vhci_close_dev+0x50/0x50 [ 60.001446][ T6833] vhci_release+0x70/0xe0 [ 60.005748][ T6833] __fput+0x33c/0x880 [ 60.009701][ T6833] task_work_run+0xdd/0x190 [ 60.014171][ T6833] do_exit+0xb72/0x2a40 [ 60.018297][ T6833] ? mm_update_next_owner+0x7a0/0x7a0 [ 60.023635][ T6833] ? __sb_end_write+0xf8/0x1d0 [ 60.028367][ T6833] ? vfs_write+0x1b0/0x6b0 [ 60.032753][ T6833] ? lock_is_held_type+0xb0/0xe0 [ 60.037659][ T6833] do_group_exit+0x125/0x310 [ 60.042222][ T6833] __x64_sys_exit_group+0x3a/0x50 [ 60.047215][ T6833] do_syscall_64+0x60/0xe0 [ 60.051649][ T6833] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.057512][ T6833] RIP: 0033:0x444fe8 [ 60.061409][ T6833] Code: Bad RIP value. [ 60.065491][ T6833] RSP: 002b:00007ffde50eda98 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 60.073877][ T6833] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000444fe8 [ 60.081818][ T6833] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001 [ 60.089763][ T6833] RBP: 00000000004cce10 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 60.097705][ T6833] R10: 00007f0c43ebb700 R11: 0000000000000246 R12: 0000000000000001 [ 60.105647][ T6833] R13: 00000000006e0200 R14: 0000000001898850 R15: 0000000000000001