[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ 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 '10.128.0.88' (ECDSA) to the list of known hosts. syzkaller login: [ 62.664484][ T6854] IPVS: ftp: loaded support on port[0] = 21 executing program [ 62.747824][ T6857] ================================================================== [ 62.756148][ T6857] BUG: KASAN: null-ptr-deref in amp_read_loc_assoc_final_data+0x117/0x1f0 [ 62.765401][ T6857] Write of size 8 at addr 0000000000000030 by task kworker/u5:1/6857 [ 62.773624][ T6857] [ 62.775971][ T6857] CPU: 1 PID: 6857 Comm: kworker/u5:1 Not tainted 5.9.0-rc1-next-20200821-syzkaller #0 [ 62.785985][ T6857] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.796886][ T6857] Workqueue: hci0 hci_rx_work [ 62.802053][ T6857] Call Trace: [ 62.805442][ T6857] dump_stack+0x18f/0x20d [ 62.809993][ T6857] ? amp_read_loc_assoc_final_data+0x117/0x1f0 [ 62.816362][ T6857] ? amp_read_loc_assoc_final_data+0x117/0x1f0 [ 62.822789][ T6857] kasan_report.cold+0x5/0x37 [ 62.827491][ T6857] ? amp_read_loc_assoc_final_data+0x117/0x1f0 [ 62.834654][ T6857] check_memory_region+0x13d/0x180 [ 62.839767][ T6857] amp_read_loc_assoc_final_data+0x117/0x1f0 [ 62.845775][ T6857] ? amp_read_loc_assoc+0x1a0/0x1a0 [ 62.851068][ T6857] ? find_held_lock+0x2d/0x110 [ 62.855852][ T6857] ? hci_event_packet+0x43cc/0x87a8 [ 62.861400][ T6857] ? lock_downgrade+0x830/0x830 [ 62.866363][ T6857] hci_event_packet+0x4407/0x87a8 [ 62.871542][ T6857] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 62.877569][ T6857] ? __lock_acquire+0x16cb/0x5640 [ 62.882608][ T6857] ? hci_cmd_complete_evt+0xc6d0/0xc6d0 [ 62.888349][ T6857] ? lock_acquire+0x1f1/0xad0 [ 62.893278][ T6857] ? skb_dequeue+0x1c/0x180 [ 62.897898][ T6857] ? find_held_lock+0x2d/0x110 [ 62.902687][ T6857] ? mark_lock+0xbc/0x1710 [ 62.907193][ T6857] ? mark_held_locks+0x9f/0xe0 [ 62.912351][ T6857] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 62.918196][ T6857] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 62.924214][ T6857] ? trace_hardirqs_on+0x5f/0x220 [ 62.929281][ T6857] ? lockdep_hardirqs_on+0x76/0xf0 [ 62.934445][ T6857] hci_rx_work+0x22e/0xb50 [ 62.938911][ T6857] process_one_work+0x94c/0x1670 [ 62.943869][ T6857] ? lock_release+0x8e0/0x8e0 [ 62.948691][ T6857] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 62.954201][ T6857] ? rwlock_bug.part.0+0x90/0x90 [ 62.959507][ T6857] worker_thread+0x64c/0x1120 [ 62.964221][ T6857] ? process_one_work+0x1670/0x1670 [ 62.969441][ T6857] kthread+0x3b5/0x4a0 [ 62.973717][ T6857] ? __kthread_bind_mask+0xc0/0xc0 [ 62.979140][ T6857] ? __kthread_bind_mask+0xc0/0xc0 [ 62.986111][ T6857] ret_from_fork+0x1f/0x30 [ 62.990987][ T6857] ================================================================== [ 62.999683][ T6857] Disabling lock debugging due to kernel taint [ 63.007253][ T6857] Kernel panic - not syncing: panic_on_warn set ... [ 63.014766][ T6857] CPU: 1 PID: 6857 Comm: kworker/u5:1 Tainted: G B 5.9.0-rc1-next-20200821-syzkaller #0 [ 63.028127][ T6857] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.038881][ T6857] Workqueue: hci0 hci_rx_work [ 63.043550][ T6857] Call Trace: [ 63.046854][ T6857] dump_stack+0x18f/0x20d [ 63.051314][ T6857] ? amp_read_loc_assoc_final_data+0xe0/0x1f0 [ 63.057475][ T6857] panic+0x2e3/0x75c [ 63.061417][ T6857] ? __warn_printk+0xf3/0xf3 [ 63.066052][ T6857] ? preempt_schedule_common+0x59/0xc0 [ 63.071580][ T6857] ? amp_read_loc_assoc_final_data+0x117/0x1f0 [ 63.077887][ T6857] ? preempt_schedule_thunk+0x16/0x18 [ 63.083362][ T6857] ? trace_hardirqs_on+0x55/0x220 [ 63.088397][ T6857] ? amp_read_loc_assoc_final_data+0x117/0x1f0 [ 63.094659][ T6857] ? amp_read_loc_assoc_final_data+0x117/0x1f0 [ 63.100817][ T6857] end_report+0x4d/0x53 [ 63.105199][ T6857] kasan_report.cold+0xd/0x37 [ 63.109877][ T6857] ? amp_read_loc_assoc_final_data+0x117/0x1f0 [ 63.116037][ T6857] check_memory_region+0x13d/0x180 [ 63.121286][ T6857] amp_read_loc_assoc_final_data+0x117/0x1f0 [ 63.127307][ T6857] ? amp_read_loc_assoc+0x1a0/0x1a0 [ 63.132510][ T6857] ? find_held_lock+0x2d/0x110 [ 63.137261][ T6857] ? hci_event_packet+0x43cc/0x87a8 [ 63.142446][ T6857] ? lock_downgrade+0x830/0x830 [ 63.147303][ T6857] hci_event_packet+0x4407/0x87a8 [ 63.152368][ T6857] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 63.158533][ T6857] ? __lock_acquire+0x16cb/0x5640 [ 63.163563][ T6857] ? hci_cmd_complete_evt+0xc6d0/0xc6d0 [ 63.169197][ T6857] ? lock_acquire+0x1f1/0xad0 [ 63.173881][ T6857] ? skb_dequeue+0x1c/0x180 [ 63.178384][ T6857] ? find_held_lock+0x2d/0x110 [ 63.183147][ T6857] ? mark_lock+0xbc/0x1710 [ 63.187571][ T6857] ? mark_held_locks+0x9f/0xe0 [ 63.192345][ T6857] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 63.198160][ T6857] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 63.204161][ T6857] ? trace_hardirqs_on+0x5f/0x220 [ 63.209203][ T6857] ? lockdep_hardirqs_on+0x76/0xf0 [ 63.214427][ T6857] hci_rx_work+0x22e/0xb50 [ 63.218850][ T6857] process_one_work+0x94c/0x1670 [ 63.223966][ T6857] ? lock_release+0x8e0/0x8e0 [ 63.228649][ T6857] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 63.234024][ T6857] ? rwlock_bug.part.0+0x90/0x90 [ 63.238952][ T6857] worker_thread+0x64c/0x1120 [ 63.243637][ T6857] ? process_one_work+0x1670/0x1670 [ 63.248848][ T6857] kthread+0x3b5/0x4a0 [ 63.252917][ T6857] ? __kthread_bind_mask+0xc0/0xc0 [ 63.258046][ T6857] ? __kthread_bind_mask+0xc0/0xc0 [ 63.263168][ T6857] ret_from_fork+0x1f/0x30 [ 63.268806][ T6857] Kernel Offset: disabled [ 63.273146][ T6857] Rebooting in 86400 seconds..