[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 99.435496][ T31] audit: type=1800 audit(1560662687.481:25): pid=12358 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 99.460614][ T31] audit: type=1800 audit(1560662687.501:26): pid=12358 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 99.512108][ T31] audit: type=1800 audit(1560662687.531:27): pid=12358 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.40' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 120.741919][T12513] ================================================================== [ 120.750067][T12513] BUG: KMSAN: uninit-value in bcmp+0x117/0x180 [ 120.756245][T12513] CPU: 0 PID: 12513 Comm: kworker/u5:2 Not tainted 5.2.0-rc4+ #3 [ 120.763971][T12513] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 120.774057][T12513] Workqueue: hci0 hci_rx_work [ 120.778750][T12513] Call Trace: [ 120.782081][T12513] dump_stack+0x191/0x1f0 [ 120.786452][T12513] kmsan_report+0x162/0x2d0 [ 120.790990][T12513] __msan_warning+0x75/0xe0 [ 120.795556][T12513] bcmp+0x117/0x180 [ 120.799414][T12513] hci_inquiry_cache_update+0x430/0x19a0 [ 120.805096][T12513] ? apic_timer_interrupt+0xa/0x40 [ 120.810228][T12513] ? stack_trace_save+0x1b0/0x1b0 [ 120.815313][T12513] hci_event_packet+0x8ef4/0x34b60 [ 120.820477][T12513] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 120.826425][T12513] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 120.832445][T12513] hci_rx_work+0x478/0xcc0 [ 120.837080][T12513] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 120.843001][T12513] ? hci_alloc_dev+0x2320/0x2320 [ 120.847966][T12513] process_one_work+0x1572/0x1f00 [ 120.853042][T12513] worker_thread+0x111b/0x2460 [ 120.857889][T12513] kthread+0x4b5/0x4f0 [ 120.862062][T12513] ? process_one_work+0x1f00/0x1f00 [ 120.867285][T12513] ? kthread_blkcg+0xf0/0xf0 [ 120.871901][T12513] ret_from_fork+0x35/0x40 [ 120.876351][T12513] [ 120.878675][T12513] Uninit was stored to memory at: [ 120.883719][T12513] kmsan_internal_chain_origin+0xcc/0x150 [ 120.889535][T12513] kmsan_memcpy_memmove_metadata+0x9f9/0xe00 [ 120.895545][T12513] kmsan_memcpy_metadata+0xb/0x10 [ 120.900940][T12513] __msan_memcpy+0x56/0x70 [ 120.905366][T12513] hci_event_packet+0x8d18/0x34b60 [ 120.910484][T12513] hci_rx_work+0x478/0xcc0 [ 120.914994][T12513] process_one_work+0x1572/0x1f00 [ 120.920330][T12513] worker_thread+0x111b/0x2460 [ 120.925118][T12513] kthread+0x4b5/0x4f0 [ 120.929200][T12513] ret_from_fork+0x35/0x40 [ 120.933614][T12513] [ 120.935947][T12513] Uninit was created at: [ 120.940199][T12513] kmsan_internal_poison_shadow+0x53/0xa0 [ 120.946019][T12513] kmsan_kmalloc+0xa4/0x130 [ 120.950542][T12513] kmsan_slab_alloc+0xe/0x10 [ 120.955151][T12513] __kmalloc_node_track_caller+0xcba/0xf30 [ 120.960970][T12513] __alloc_skb+0x306/0xa10 [ 120.965836][T12513] vhci_write+0x15b/0x7e0 [ 120.970325][T12513] __vfs_write+0xa2c/0xcb0 [ 120.974761][T12513] vfs_write+0x481/0x920 [ 120.979013][T12513] ksys_write+0x265/0x430 [ 120.983356][T12513] __se_sys_write+0x92/0xb0 [ 120.987867][T12513] __x64_sys_write+0x4a/0x70 [ 120.992581][T12513] do_syscall_64+0xbc/0xf0 [ 120.997104][T12513] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 121.003085][T12513] ================================================================== [ 121.011234][T12513] Disabling lock debugging due to kernel taint [ 121.017554][T12513] Kernel panic - not syncing: panic_on_warn set ... [ 121.024260][T12513] CPU: 0 PID: 12513 Comm: kworker/u5:2 Tainted: G B 5.2.0-rc4+ #3 [ 121.033373][T12513] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 121.043462][T12513] Workqueue: hci0 hci_rx_work [ 121.048294][T12513] Call Trace: [ 121.051634][T12513] dump_stack+0x191/0x1f0 [ 121.056003][T12513] panic+0x3c9/0xc1e [ 121.060215][T12513] kmsan_report+0x2ca/0x2d0 [ 121.064836][T12513] __msan_warning+0x75/0xe0 [ 121.069479][T12513] bcmp+0x117/0x180 [ 121.073422][T12513] hci_inquiry_cache_update+0x430/0x19a0 [ 121.079088][T12513] ? apic_timer_interrupt+0xa/0x40 [ 121.084252][T12513] ? stack_trace_save+0x1b0/0x1b0 [ 121.089408][T12513] hci_event_packet+0x8ef4/0x34b60 [ 121.094847][T12513] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 121.100896][T12513] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 121.106829][T12513] hci_rx_work+0x478/0xcc0 [ 121.111287][T12513] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 121.117207][T12513] ? hci_alloc_dev+0x2320/0x2320 [ 121.122263][T12513] process_one_work+0x1572/0x1f00 [ 121.127424][T12513] worker_thread+0x111b/0x2460 [ 121.132255][T12513] kthread+0x4b5/0x4f0 [ 121.136337][T12513] ? process_one_work+0x1f00/0x1f00 [ 121.141562][T12513] ? kthread_blkcg+0xf0/0xf0 [ 121.146348][T12513] ret_from_fork+0x35/0x40 [ 121.151892][T12513] Kernel Offset: disabled [ 121.156316][T12513] Rebooting in 86400 seconds..