[ OK ] Started OpenBSD Secure Shell server. [ 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. Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 84.939724][ T8776] sshd (8776) used greatest stack depth: 4768 bytes left Warning: Permanently added '10.128.0.31' (ECDSA) to the list of known hosts. executing program [ 93.266424][ T8814] ===================================================== [ 93.273487][ T8814] BUG: KMSAN: uninit-value in hci_event_packet+0x153f/0x359e0 [ 93.280974][ T8814] CPU: 1 PID: 8814 Comm: kworker/u5:1 Not tainted 5.7.0-rc4-syzkaller #0 [ 93.289396][ T8814] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.299482][ T8814] Workqueue: hci0 hci_rx_work [ 93.304179][ T8814] Call Trace: [ 93.307498][ T8814] dump_stack+0x1c9/0x220 [ 93.311864][ T8814] kmsan_report+0xf7/0x1e0 [ 93.316317][ T8814] __msan_warning+0x58/0xa0 [ 93.320856][ T8814] hci_event_packet+0x153f/0x359e0 [ 93.326039][ T8814] ? kmsan_get_metadata+0x11d/0x180 [ 93.331304][ T8814] ? kmsan_get_metadata+0x4f/0x180 [ 93.336507][ T8814] ? kmsan_get_metadata+0x11d/0x180 [ 93.341763][ T8814] ? hci_send_to_monitor+0x138/0x520 [ 93.347080][ T8814] ? kmsan_get_metadata+0x11d/0x180 [ 93.352359][ T8814] hci_rx_work+0xa8f/0xd20 [ 93.356832][ T8814] ? hci_alloc_dev+0x2680/0x2680 [ 93.361792][ T8814] process_one_work+0x1555/0x1f40 [ 93.366873][ T8814] worker_thread+0xef6/0x2450 [ 93.371591][ T8814] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 93.377420][ T8814] ? kmsan_get_metadata+0x11d/0x180 [ 93.382672][ T8814] kthread+0x4b5/0x4f0 [ 93.386758][ T8814] ? process_one_work+0x1f40/0x1f40 [ 93.392811][ T8814] ? kthread_blkcg+0xf0/0xf0 [ 93.397521][ T8814] ret_from_fork+0x35/0x40 [ 93.403303][ T8814] [ 93.405643][ T8814] Uninit was created at: [ 93.409923][ T8814] kmsan_internal_poison_shadow+0x66/0xd0 [ 93.417258][ T8814] kmsan_slab_alloc+0x8a/0xe0 [ 93.423712][ T8814] __kmalloc_node_track_caller+0xb40/0x1200 [ 93.431114][ T8814] __alloc_skb+0x2fd/0xac0 [ 93.435768][ T8814] vhci_write+0x15b/0x800 [ 93.441784][ T8814] __vfs_write+0xa5a/0xca0 [ 93.447500][ T8814] vfs_write+0x444/0x8e0 [ 93.453720][ T8814] ksys_write+0x267/0x450 [ 93.459145][ T8814] __se_sys_write+0x92/0xb0 [ 93.464142][ T8814] __x64_sys_write+0x4a/0x70 [ 93.468845][ T8814] do_syscall_64+0xb8/0x160 [ 93.475983][ T8814] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 93.484233][ T8814] ===================================================== [ 93.492128][ T8814] Disabling lock debugging due to kernel taint [ 93.498290][ T8814] Kernel panic - not syncing: panic_on_warn set ... [ 93.504902][ T8814] CPU: 1 PID: 8814 Comm: kworker/u5:1 Tainted: G B 5.7.0-rc4-syzkaller #0 [ 93.514709][ T8814] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.524823][ T8814] Workqueue: hci0 hci_rx_work [ 93.529514][ T8814] Call Trace: [ 93.532835][ T8814] dump_stack+0x1c9/0x220 [ 93.537288][ T8814] panic+0x3d5/0xc3e [ 93.541336][ T8814] kmsan_report+0x1df/0x1e0 [ 93.545877][ T8814] __msan_warning+0x58/0xa0 [ 93.550418][ T8814] hci_event_packet+0x153f/0x359e0 [ 93.555841][ T8814] ? kmsan_get_metadata+0x11d/0x180 [ 93.561114][ T8814] ? kmsan_get_metadata+0x4f/0x180 [ 93.566270][ T8814] ? kmsan_get_metadata+0x11d/0x180 [ 93.571610][ T8814] ? hci_send_to_monitor+0x138/0x520 [ 93.577046][ T8814] ? kmsan_get_metadata+0x11d/0x180 [ 93.582302][ T8814] hci_rx_work+0xa8f/0xd20 [ 93.586763][ T8814] ? hci_alloc_dev+0x2680/0x2680 [ 93.591718][ T8814] process_one_work+0x1555/0x1f40 [ 93.596785][ T8814] worker_thread+0xef6/0x2450 [ 93.601519][ T8814] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 93.607356][ T8814] ? kmsan_get_metadata+0x11d/0x180 [ 93.612607][ T8814] kthread+0x4b5/0x4f0 [ 93.616732][ T8814] ? process_one_work+0x1f40/0x1f40 [ 93.621994][ T8814] ? kthread_blkcg+0xf0/0xf0 [ 93.626671][ T8814] ret_from_fork+0x35/0x40 [ 93.632539][ T8814] Kernel Offset: 0x13800000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 93.644446][ T8814] Rebooting in 86400 seconds..