[ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.192' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 100.005239][ T2304] ===================================================== [ 100.012270][ T2304] BUG: KMSAN: uninit-value in hci_event_packet+0x169f/0x35870 [ 100.019751][ T2304] CPU: 1 PID: 2304 Comm: kworker/u5:0 Not tainted 5.6.0-rc7-syzkaller #0 [ 100.028172][ T2304] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 100.038257][ T2304] Workqueue: hci0 hci_rx_work [ 100.042939][ T2304] Call Trace: [ 100.046242][ T2304] dump_stack+0x1c9/0x220 [ 100.050599][ T2304] kmsan_report+0xf7/0x1e0 [ 100.055039][ T2304] __msan_warning+0x58/0xa0 [ 100.059563][ T2304] hci_event_packet+0x169f/0x35870 [ 100.064687][ T2304] ? kmsan_get_metadata+0x4f/0x180 [ 100.069818][ T2304] ? kmsan_get_metadata+0x11d/0x180 [ 100.075084][ T2304] ? hci_send_to_monitor+0x138/0x520 [ 100.080391][ T2304] ? kmsan_get_metadata+0x11d/0x180 [ 100.085613][ T2304] hci_rx_work+0xa86/0xd40 [ 100.090057][ T2304] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 100.095881][ T2304] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 100.101959][ T2304] ? kmsan_get_metadata+0x11d/0x180 [ 100.107201][ T2304] ? hci_alloc_dev+0x2460/0x2460 [ 100.112160][ T2304] process_one_work+0x1555/0x1f40 [ 100.117272][ T2304] worker_thread+0xef6/0x2450 [ 100.122017][ T2304] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 100.127887][ T2304] ? kmsan_get_metadata+0x11d/0x180 [ 100.133158][ T2304] kthread+0x4b5/0x4f0 [ 100.137254][ T2304] ? process_one_work+0x1f40/0x1f40 [ 100.142489][ T2304] ? kthread_blkcg+0xf0/0xf0 [ 100.147103][ T2304] ret_from_fork+0x35/0x40 [ 100.151548][ T2304] [ 100.153879][ T2304] Uninit was created at: [ 100.158132][ T2304] kmsan_internal_poison_shadow+0x66/0xd0 [ 100.163856][ T2304] kmsan_slab_alloc+0x8a/0xe0 [ 100.168537][ T2304] __kmalloc_node_track_caller+0xb40/0x1200 [ 100.174441][ T2304] __alloc_skb+0x2fd/0xac0 [ 100.178867][ T2304] vhci_write+0x15b/0x800 [ 100.183206][ T2304] __vfs_write+0xa5a/0xca0 [ 100.187628][ T2304] vfs_write+0x44a/0x8f0 [ 100.191874][ T2304] ksys_write+0x267/0x450 [ 100.196213][ T2304] __ia32_sys_write+0xdb/0x120 [ 100.200991][ T2304] do_fast_syscall_32+0x3c7/0x6e0 [ 100.206057][ T2304] entry_SYSENTER_compat+0x68/0x77 [ 100.211165][ T2304] ===================================================== [ 100.218183][ T2304] Disabling lock debugging due to kernel taint [ 100.224344][ T2304] Kernel panic - not syncing: panic_on_warn set ... [ 100.230943][ T2304] CPU: 1 PID: 2304 Comm: kworker/u5:0 Tainted: G B 5.6.0-rc7-syzkaller #0 [ 100.240748][ T2304] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 100.250834][ T2304] Workqueue: hci0 hci_rx_work [ 100.255524][ T2304] Call Trace: [ 100.258837][ T2304] dump_stack+0x1c9/0x220 [ 100.263201][ T2304] panic+0x3d5/0xc3e [ 100.267180][ T2304] kmsan_report+0x1df/0x1e0 [ 100.271716][ T2304] __msan_warning+0x58/0xa0 [ 100.276267][ T2304] hci_event_packet+0x169f/0x35870 [ 100.281395][ T2304] ? kmsan_get_metadata+0x4f/0x180 [ 100.286529][ T2304] ? kmsan_get_metadata+0x11d/0x180 [ 100.291801][ T2304] ? hci_send_to_monitor+0x138/0x520 [ 100.297106][ T2304] ? kmsan_get_metadata+0x11d/0x180 [ 100.302331][ T2304] hci_rx_work+0xa86/0xd40 [ 100.306779][ T2304] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 100.312603][ T2304] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 100.318696][ T2304] ? kmsan_get_metadata+0x11d/0x180 [ 100.323923][ T2304] ? hci_alloc_dev+0x2460/0x2460 [ 100.328878][ T2304] process_one_work+0x1555/0x1f40 [ 100.333978][ T2304] worker_thread+0xef6/0x2450 [ 100.338687][ T2304] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 100.344514][ T2304] ? kmsan_get_metadata+0x11d/0x180 [ 100.349768][ T2304] kthread+0x4b5/0x4f0 [ 100.353846][ T2304] ? process_one_work+0x1f40/0x1f40 [ 100.359077][ T2304] ? kthread_blkcg+0xf0/0xf0 [ 100.363684][ T2304] ret_from_fork+0x35/0x40 [ 100.369166][ T2304] Kernel Offset: 0x2ac00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 100.380837][ T2304] Rebooting in 86400 seconds..