[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.28' (ECDSA) to the list of known hosts. syzkaller login: [ 65.308310][ T6857] IPVS: ftp: loaded support on port[0] = 21 executing program [ 65.402736][ T6863] ================================================================== [ 65.411143][ T6863] BUG: KASAN: null-ptr-deref in amp_read_loc_assoc_final_data+0x117/0x1f0 [ 65.419656][ T6863] Write of size 8 at addr 0000000000000030 by task kworker/u5:2/6863 [ 65.427719][ T6863] [ 65.430054][ T6863] CPU: 0 PID: 6863 Comm: kworker/u5:2 Not tainted 5.9.0-rc2-syzkaller #0 [ 65.438453][ T6863] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.448506][ T6863] Workqueue: hci0 hci_rx_work [ 65.453166][ T6863] Call Trace: [ 65.456448][ T6863] dump_stack+0x18f/0x20d [ 65.460781][ T6863] ? amp_read_loc_assoc_final_data+0x117/0x1f0 [ 65.466926][ T6863] ? amp_read_loc_assoc_final_data+0x117/0x1f0 [ 65.473068][ T6863] kasan_report.cold+0x5/0x37 [ 65.477753][ T6863] ? amp_read_loc_assoc_final_data+0x117/0x1f0 [ 65.483904][ T6863] check_memory_region+0x13d/0x180 [ 65.489010][ T6863] amp_read_loc_assoc_final_data+0x117/0x1f0 [ 65.495010][ T6863] ? amp_read_loc_assoc+0x1a0/0x1a0 [ 65.500197][ T6863] ? find_held_lock+0x2d/0x110 [ 65.504945][ T6863] ? hci_event_packet+0x43cc/0x87a8 [ 65.510148][ T6863] ? lock_downgrade+0x830/0x830 [ 65.520512][ T6863] hci_event_packet+0x4407/0x87a8 [ 65.525569][ T6863] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 65.531553][ T6863] ? __lock_acquire+0x16cb/0x5640 [ 65.536579][ T6863] ? hci_cmd_complete_evt+0xc6d0/0xc6d0 [ 65.542351][ T6863] ? lock_acquire+0x1f1/0xad0 [ 65.547027][ T6863] ? skb_dequeue+0x1c/0x180 [ 65.561251][ T6863] ? find_held_lock+0x2d/0x110 [ 65.566009][ T6863] ? mark_lock+0xbc/0x1710 [ 65.570421][ T6863] ? mark_held_locks+0x9f/0xe0 [ 65.575183][ T6863] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 65.580984][ T6863] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 65.586962][ T6863] ? trace_hardirqs_on+0x5f/0x220 [ 65.591970][ T6863] ? lockdep_hardirqs_on+0x76/0xf0 [ 65.597082][ T6863] hci_rx_work+0x22e/0xb50 [ 65.601493][ T6863] process_one_work+0x94c/0x1670 [ 65.606435][ T6863] ? lock_release+0x8e0/0x8e0 [ 65.611114][ T6863] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 65.616480][ T6863] ? rwlock_bug.part.0+0x90/0x90 [ 65.621425][ T6863] worker_thread+0x64c/0x1120 [ 65.626093][ T6863] ? __kthread_parkme+0x13f/0x1e0 [ 65.631125][ T6863] ? process_one_work+0x1670/0x1670 [ 65.636332][ T6863] kthread+0x3b5/0x4a0 [ 65.640391][ T6863] ? __kthread_bind_mask+0xc0/0xc0 [ 65.645535][ T6863] ? __kthread_bind_mask+0xc0/0xc0 [ 65.650658][ T6863] ret_from_fork+0x1f/0x30 [ 65.655076][ T6863] ================================================================== [ 65.663129][ T6863] Disabling lock debugging due to kernel taint [ 65.670400][ T6863] Kernel panic - not syncing: panic_on_warn set ... [ 65.677026][ T6863] CPU: 0 PID: 6863 Comm: kworker/u5:2 Tainted: G B 5.9.0-rc2-syzkaller #0 [ 65.686858][ T6863] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.697546][ T6863] Workqueue: hci0 hci_rx_work [ 65.702225][ T6863] Call Trace: [ 65.706309][ T6863] dump_stack+0x18f/0x20d [ 65.710649][ T6863] ? amp_read_loc_assoc_final_data+0xa0/0x1f0 [ 65.716726][ T6863] panic+0x2e3/0x75c [ 65.720621][ T6863] ? __warn_printk+0xf3/0xf3 [ 65.725203][ T6863] ? preempt_schedule_common+0x59/0xc0 [ 65.730670][ T6863] ? amp_read_loc_assoc_final_data+0x117/0x1f0 [ 65.736823][ T6863] ? preempt_schedule_thunk+0x16/0x18 [ 65.742203][ T6863] ? trace_hardirqs_on+0x55/0x220 [ 65.747339][ T6863] ? amp_read_loc_assoc_final_data+0x117/0x1f0 [ 65.753507][ T6863] ? amp_read_loc_assoc_final_data+0x117/0x1f0 [ 65.759682][ T6863] end_report+0x4d/0x53 [ 65.763837][ T6863] kasan_report.cold+0xd/0x37 [ 65.768513][ T6863] ? amp_read_loc_assoc_final_data+0x117/0x1f0 [ 65.775627][ T6863] check_memory_region+0x13d/0x180 [ 65.780754][ T6863] amp_read_loc_assoc_final_data+0x117/0x1f0 [ 65.786755][ T6863] ? amp_read_loc_assoc+0x1a0/0x1a0 [ 65.791964][ T6863] ? find_held_lock+0x2d/0x110 [ 65.796744][ T6863] ? hci_event_packet+0x43cc/0x87a8 [ 65.801953][ T6863] ? lock_downgrade+0x830/0x830 [ 65.806819][ T6863] hci_event_packet+0x4407/0x87a8 [ 65.811850][ T6863] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 65.817836][ T6863] ? __lock_acquire+0x16cb/0x5640 [ 65.822896][ T6863] ? hci_cmd_complete_evt+0xc6d0/0xc6d0 [ 65.828464][ T6863] ? lock_acquire+0x1f1/0xad0 [ 65.833164][ T6863] ? skb_dequeue+0x1c/0x180 [ 65.837679][ T6863] ? find_held_lock+0x2d/0x110 [ 65.842465][ T6863] ? mark_lock+0xbc/0x1710 [ 65.846913][ T6863] ? mark_held_locks+0x9f/0xe0 [ 65.851695][ T6863] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 65.857539][ T6863] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 65.863530][ T6863] ? trace_hardirqs_on+0x5f/0x220 [ 65.868566][ T6863] ? lockdep_hardirqs_on+0x76/0xf0 [ 65.873684][ T6863] hci_rx_work+0x22e/0xb50 [ 65.878134][ T6863] process_one_work+0x94c/0x1670 [ 65.883113][ T6863] ? lock_release+0x8e0/0x8e0 [ 65.887820][ T6863] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 65.893198][ T6863] ? rwlock_bug.part.0+0x90/0x90 [ 65.898162][ T6863] worker_thread+0x64c/0x1120 [ 65.902847][ T6863] ? __kthread_parkme+0x13f/0x1e0 [ 65.907892][ T6863] ? process_one_work+0x1670/0x1670 [ 65.913090][ T6863] kthread+0x3b5/0x4a0 [ 65.917159][ T6863] ? __kthread_bind_mask+0xc0/0xc0 [ 65.922268][ T6863] ? __kthread_bind_mask+0xc0/0xc0 [ 65.927397][ T6863] ret_from_fork+0x1f/0x30 [ 65.932944][ T6863] Kernel Offset: disabled [ 65.937272][ T6863] Rebooting in 86400 seconds..