Starting Permit User Sessions... [ OK ] Started Regular background program processing daemon. [ OK ] Started Daily Cleanup of Temporary Directories. [ OK ] Started Daily apt upgrade and clean activities. [ OK ] Reached target Timers. [ 53.666147][ T6542] sshd (6542) used greatest stack depth: 23120 bytes left [ OK ] Started System Logging Service. [ OK ] Started Permit User Sessions. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ 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... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.26' (ECDSA) to the list of known hosts. syzkaller login: [ 70.179388][ T28] audit: type=1400 audit(1596387362.316:8): avc: denied { execmem } for pid=6872 comm="syz-executor164" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 70.196749][ T6873] IPVS: ftp: loaded support on port[0] = 21 executing program [ 71.334805][ T6899] ================================================================== [ 71.343077][ T6899] BUG: KASAN: null-ptr-deref in amp_read_loc_assoc_final_data+0x120/0x1f0 [ 71.351583][ T6899] Write of size 8 at addr 0000000000000030 by task kworker/u5:2/6899 [ 71.359645][ T6899] [ 71.361986][ T6899] CPU: 1 PID: 6899 Comm: kworker/u5:2 Not tainted 5.8.0-rc7-syzkaller #0 [ 71.370383][ T6899] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.380437][ T6899] Workqueue: hci0 hci_rx_work [ 71.385092][ T6899] Call Trace: [ 71.388369][ T6899] dump_stack+0x18f/0x20d [ 71.392684][ T6899] ? amp_read_loc_assoc_final_data+0x120/0x1f0 [ 71.398817][ T6899] ? amp_read_loc_assoc_final_data+0x120/0x1f0 [ 71.404966][ T6899] kasan_report.cold+0x5/0x37 [ 71.409628][ T6899] ? amp_read_loc_assoc_final_data+0x120/0x1f0 [ 71.415762][ T6899] check_memory_region+0x13d/0x180 [ 71.420878][ T6899] amp_read_loc_assoc_final_data+0x120/0x1f0 [ 71.426841][ T6899] ? amp_read_loc_assoc+0x1a0/0x1a0 [ 71.432020][ T6899] ? find_held_lock+0x2d/0x110 [ 71.436769][ T6899] ? hci_event_packet+0x4123/0x86f5 [ 71.441956][ T6899] ? lock_downgrade+0x820/0x820 [ 71.446797][ T6899] hci_event_packet+0x415e/0x86f5 [ 71.451810][ T6899] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 71.457772][ T6899] ? __lock_acquire+0x16e3/0x56e0 [ 71.462782][ T6899] ? hci_cmd_complete_evt+0xc6e0/0xc6e0 [ 71.468311][ T6899] ? lock_acquire+0x1f1/0xad0 [ 71.472972][ T6899] ? skb_dequeue+0x1c/0x180 [ 71.477456][ T6899] ? find_held_lock+0x2d/0x110 [ 71.482202][ T6899] ? mark_lock+0xbc/0x1710 [ 71.486603][ T6899] ? mark_held_locks+0x9f/0xe0 [ 71.491349][ T6899] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 71.497139][ T6899] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 71.503101][ T6899] ? trace_hardirqs_on+0x5f/0x220 [ 71.508110][ T6899] ? lockdep_hardirqs_on+0x6a/0xe0 [ 71.513215][ T6899] hci_rx_work+0x22e/0xb10 [ 71.517632][ T6899] process_one_work+0x94c/0x1670 [ 71.529589][ T6899] ? lock_release+0x8d0/0x8d0 [ 71.534249][ T6899] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 71.539614][ T6899] ? rwlock_bug.part.0+0x90/0x90 [ 71.544538][ T6899] ? lockdep_hardirqs_off+0x66/0xa0 [ 71.549726][ T6899] worker_thread+0x64c/0x1120 [ 71.554393][ T6899] ? __kthread_parkme+0x13f/0x1e0 [ 71.559849][ T6899] ? process_one_work+0x1670/0x1670 [ 71.565029][ T6899] kthread+0x3b5/0x4a0 [ 71.569078][ T6899] ? __kthread_bind_mask+0xc0/0xc0 [ 71.574184][ T6899] ? __kthread_bind_mask+0xc0/0xc0 [ 71.579281][ T6899] ret_from_fork+0x1f/0x30 [ 71.583683][ T6899] ================================================================== [ 71.591718][ T6899] Disabling lock debugging due to kernel taint [ 71.604846][ T6899] Kernel panic - not syncing: panic_on_warn set ... [ 71.611473][ T6899] CPU: 0 PID: 6899 Comm: kworker/u5:2 Tainted: G B 5.8.0-rc7-syzkaller #0 [ 71.621264][ T6899] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.631437][ T6899] Workqueue: hci0 hci_rx_work [ 71.636105][ T6899] Call Trace: [ 71.639398][ T6899] dump_stack+0x18f/0x20d [ 71.643736][ T6899] ? amp_read_loc_assoc_final_data+0xd0/0x1f0 [ 71.649804][ T6899] panic+0x2e3/0x75c [ 71.653697][ T6899] ? __warn_printk+0xf3/0xf3 [ 71.658302][ T6899] ? preempt_schedule_common+0x59/0xc0 [ 71.663761][ T6899] ? amp_read_loc_assoc_final_data+0x120/0x1f0 [ 71.669914][ T6899] ? preempt_schedule_thunk+0x16/0x18 [ 71.675261][ T6899] ? trace_hardirqs_on+0x55/0x220 [ 71.680349][ T6899] ? amp_read_loc_assoc_final_data+0x120/0x1f0 [ 71.686476][ T6899] ? amp_read_loc_assoc_final_data+0x120/0x1f0 [ 71.692611][ T6899] end_report+0x4d/0x53 [ 71.696869][ T6899] kasan_report.cold+0xd/0x37 [ 71.701529][ T6899] ? amp_read_loc_assoc_final_data+0x120/0x1f0 [ 71.707660][ T6899] check_memory_region+0x13d/0x180 [ 71.712752][ T6899] amp_read_loc_assoc_final_data+0x120/0x1f0 [ 71.718713][ T6899] ? amp_read_loc_assoc+0x1a0/0x1a0 [ 71.723888][ T6899] ? find_held_lock+0x2d/0x110 [ 71.728634][ T6899] ? hci_event_packet+0x4123/0x86f5 [ 71.734031][ T6899] ? lock_downgrade+0x820/0x820 [ 71.738872][ T6899] hci_event_packet+0x415e/0x86f5 [ 71.743879][ T6899] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 71.749839][ T6899] ? __lock_acquire+0x16e3/0x56e0 [ 71.754873][ T6899] ? hci_cmd_complete_evt+0xc6e0/0xc6e0 [ 71.760403][ T6899] ? lock_acquire+0x1f1/0xad0 [ 71.765060][ T6899] ? skb_dequeue+0x1c/0x180 [ 71.769543][ T6899] ? find_held_lock+0x2d/0x110 [ 71.774280][ T6899] ? mark_lock+0xbc/0x1710 [ 71.778673][ T6899] ? mark_held_locks+0x9f/0xe0 [ 71.783548][ T6899] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 71.789447][ T6899] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 71.795404][ T6899] ? trace_hardirqs_on+0x5f/0x220 [ 71.800455][ T6899] ? lockdep_hardirqs_on+0x6a/0xe0 [ 71.805556][ T6899] hci_rx_work+0x22e/0xb10 [ 71.809962][ T6899] process_one_work+0x94c/0x1670 [ 71.814899][ T6899] ? lock_release+0x8d0/0x8d0 [ 71.819553][ T6899] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 71.824900][ T6899] ? rwlock_bug.part.0+0x90/0x90 [ 71.829813][ T6899] ? lockdep_hardirqs_off+0x66/0xa0 [ 71.834986][ T6899] worker_thread+0x64c/0x1120 [ 71.839637][ T6899] ? __kthread_parkme+0x13f/0x1e0 [ 71.844656][ T6899] ? process_one_work+0x1670/0x1670 [ 71.849835][ T6899] kthread+0x3b5/0x4a0 [ 71.853883][ T6899] ? __kthread_bind_mask+0xc0/0xc0 [ 71.858973][ T6899] ? __kthread_bind_mask+0xc0/0xc0 [ 71.864064][ T6899] ret_from_fork+0x1f/0x30 [ 71.869701][ T6899] Kernel Offset: disabled [ 71.874017][ T6899] Rebooting in 86400 seconds..