[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 101.377822][ T32] audit: type=1800 audit(1584390647.454:25): pid=10917 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 101.404663][ T32] audit: type=1800 audit(1584390647.484:26): pid=10917 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 101.454004][ T32] audit: type=1800 audit(1584390647.504:27): pid=10917 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[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.33' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 113.750463][T11082] ===================================================== [ 113.757463][T11082] BUG: KMSAN: uninit-value in hci_event_packet+0x169f/0x35870 [ 113.764923][T11082] CPU: 0 PID: 11082 Comm: kworker/u5:3 Not tainted 5.6.0-rc6-syzkaller #0 [ 113.773419][T11082] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 113.783599][T11082] Workqueue: hci0 hci_rx_work [ 113.788279][T11082] Call Trace: [ 113.791577][T11082] dump_stack+0x1c9/0x220 [ 113.795922][T11082] kmsan_report+0xf7/0x1e0 executing program executing program executing program [ 113.800351][T11082] __msan_warning+0x58/0xa0 [ 113.804867][T11082] hci_event_packet+0x169f/0x35870 [ 113.809991][T11082] ? kmsan_get_metadata+0x4f/0x180 [ 113.815126][T11082] ? kmsan_get_metadata+0x11d/0x180 [ 113.820362][T11082] ? hci_send_to_monitor+0x138/0x520 [ 113.825658][T11082] ? kmsan_get_metadata+0x11d/0x180 [ 113.830869][T11082] hci_rx_work+0xa86/0xd40 [ 113.835415][T11082] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 113.841490][T11082] ? kmsan_get_metadata+0x11d/0x180 executing program executing program executing program [ 113.846707][T11082] ? hci_alloc_dev+0x2460/0x2460 [ 113.851761][T11082] process_one_work+0x1555/0x1f40 [ 113.856829][T11082] worker_thread+0xef6/0x2450 [ 113.861523][T11082] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 113.867341][T11082] ? kmsan_get_metadata+0x11d/0x180 [ 113.872569][T11082] kthread+0x4b5/0x4f0 [ 113.876648][T11082] ? process_one_work+0x1f40/0x1f40 [ 113.881859][T11082] ? kthread_blkcg+0xf0/0xf0 [ 113.886459][T11082] ret_from_fork+0x35/0x40 [ 113.890881][T11082] [ 113.893208][T11082] Uninit was created at: executing program [ 113.897457][T11082] kmsan_internal_poison_shadow+0x66/0xd0 [ 113.903182][T11082] kmsan_slab_alloc+0x8a/0xe0 [ 113.907859][T11082] __kmalloc_node_track_caller+0xb40/0x1200 [ 113.913755][T11082] __alloc_skb+0x2fd/0xac0 [ 113.918198][T11082] vhci_write+0x15b/0x800 [ 113.922530][T11082] __vfs_write+0xa5a/0xca0 [ 113.927068][T11082] vfs_write+0x44a/0x8f0 [ 113.931317][T11082] ksys_write+0x267/0x450 [ 113.935658][T11082] __se_sys_write+0x92/0xb0 [ 113.940168][T11082] __x64_sys_write+0x4a/0x70 [ 113.944764][T11082] do_syscall_64+0xb8/0x160 [ 113.949276][T11082] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 113.955163][T11082] ===================================================== [ 113.962095][T11082] Disabling lock debugging due to kernel taint [ 113.968255][T11082] Kernel panic - not syncing: panic_on_warn set ... [ 113.974856][T11082] CPU: 0 PID: 11082 Comm: kworker/u5:3 Tainted: G B 5.6.0-rc6-syzkaller #0 [ 113.984748][T11082] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 113.994816][T11082] Workqueue: hci0 hci_rx_work [ 113.999493][T11082] Call Trace: [ 114.002792][T11082] dump_stack+0x1c9/0x220 [ 114.007136][T11082] panic+0x3d5/0xc3e [ 114.011077][T11082] kmsan_report+0x1df/0x1e0 [ 114.015725][T11082] __msan_warning+0x58/0xa0 [ 114.020252][T11082] hci_event_packet+0x169f/0x35870 [ 114.025378][T11082] ? kmsan_get_metadata+0x4f/0x180 [ 114.030501][T11082] ? kmsan_get_metadata+0x11d/0x180 [ 114.035746][T11082] ? hci_send_to_monitor+0x138/0x520 [ 114.041055][T11082] ? kmsan_get_metadata+0x11d/0x180 [ 114.046270][T11082] hci_rx_work+0xa86/0xd40 [ 114.050711][T11082] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 114.056789][T11082] ? kmsan_get_metadata+0x11d/0x180 [ 114.061999][T11082] ? hci_alloc_dev+0x2460/0x2460 [ 114.066944][T11082] process_one_work+0x1555/0x1f40 [ 114.072007][T11082] worker_thread+0xef6/0x2450 [ 114.076703][T11082] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 114.082520][T11082] ? kmsan_get_metadata+0x11d/0x180 [ 114.087748][T11082] kthread+0x4b5/0x4f0 [ 114.091818][T11082] ? process_one_work+0x1f40/0x1f40 [ 114.097029][T11082] ? kthread_blkcg+0xf0/0xf0 [ 114.101635][T11082] ret_from_fork+0x35/0x40 [ 114.107375][T11082] Kernel Offset: 0x19e00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 114.118987][T11082] Rebooting in 86400 seconds..