[ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started Getty on tty3. [ OK ] Started System Logging Service. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.109' (ECDSA) to the list of known hosts. syzkaller login: [ 140.968072][ T8480] IPVS: ftp: loaded support on port[0] = 21 executing program [ 141.089823][ T8486] ===================================================== [ 141.096829][ T8486] BUG: KMSAN: uninit-value in hci_chan_lookup_handle+0x1e3/0x310 [ 141.104562][ T8486] CPU: 1 PID: 8486 Comm: kworker/u5:2 Not tainted 5.8.0-rc5-syzkaller #0 [ 141.112961][ T8486] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 141.123014][ T8486] Workqueue: hci0 hci_rx_work [ 141.127679][ T8486] Call Trace: [ 141.130967][ T8486] dump_stack+0x21c/0x280 [ 141.135293][ T8486] kmsan_report+0xf7/0x1e0 [ 141.139705][ T8486] __msan_warning+0x58/0xa0 [ 141.144209][ T8486] hci_chan_lookup_handle+0x1e3/0x310 [ 141.149581][ T8486] hci_event_packet+0x14e10/0x39d30 [ 141.154770][ T8486] ? kmsan_get_metadata+0x116/0x180 [ 141.159960][ T8486] ? kmsan_get_metadata+0x116/0x180 [ 141.165149][ T8486] ? kmsan_set_origin_checked+0x95/0xf0 [ 141.170688][ T8486] ? kmsan_get_metadata+0x116/0x180 [ 141.175884][ T8486] ? kmsan_get_metadata+0x116/0x180 [ 141.181075][ T8486] ? kmsan_get_metadata+0x116/0x180 [ 141.186268][ T8486] ? kmsan_get_metadata+0x116/0x180 [ 141.191470][ T8486] hci_rx_work+0x6df/0xd30 [ 141.195886][ T8486] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 141.201685][ T8486] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 141.207744][ T8486] ? hci_alloc_dev+0x2680/0x2680 [ 141.212673][ T8486] process_one_work+0x1688/0x2140 [ 141.217703][ T8486] worker_thread+0x10bc/0x2730 [ 141.222466][ T8486] ? kmsan_get_metadata+0x116/0x180 [ 141.227654][ T8486] ? kmsan_get_metadata+0x116/0x180 [ 141.232858][ T8486] kthread+0x551/0x590 [ 141.236921][ T8486] ? process_one_work+0x2140/0x2140 [ 141.242114][ T8486] ? kthread_blkcg+0x110/0x110 [ 141.246872][ T8486] ret_from_fork+0x1f/0x30 [ 141.251276][ T8486] [ 141.253592][ T8486] Uninit was created at: [ 141.257824][ T8486] kmsan_internal_poison_shadow+0x66/0xd0 [ 141.263533][ T8486] kmsan_slab_alloc+0x8a/0xe0 [ 141.268200][ T8486] __kmalloc_node_track_caller+0xeab/0x12e0 [ 141.274081][ T8486] __alloc_skb+0x35f/0xb30 [ 141.278505][ T8486] vhci_write+0x18a/0x890 [ 141.282836][ T8486] vfs_write+0xf9a/0x17c0 [ 141.287162][ T8486] ksys_write+0x275/0x500 [ 141.291485][ T8486] __se_sys_write+0x92/0xb0 [ 141.295999][ T8486] __x64_sys_write+0x4a/0x70 [ 141.300589][ T8486] do_syscall_64+0xad/0x160 [ 141.305084][ T8486] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 141.310960][ T8486] ===================================================== [ 141.317875][ T8486] Disabling lock debugging due to kernel taint [ 141.324020][ T8486] Kernel panic - not syncing: panic_on_warn set ... [ 141.330598][ T8486] CPU: 1 PID: 8486 Comm: kworker/u5:2 Tainted: G B 5.8.0-rc5-syzkaller #0 [ 141.340387][ T8486] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 141.350437][ T8486] Workqueue: hci0 hci_rx_work [ 141.355096][ T8486] Call Trace: [ 141.358380][ T8486] dump_stack+0x21c/0x280 [ 141.362706][ T8486] panic+0x4d7/0xef7 [ 141.366606][ T8486] ? add_taint+0x17c/0x210 [ 141.371016][ T8486] kmsan_report+0x1df/0x1e0 [ 141.375513][ T8486] __msan_warning+0x58/0xa0 [ 141.380011][ T8486] hci_chan_lookup_handle+0x1e3/0x310 [ 141.385382][ T8486] hci_event_packet+0x14e10/0x39d30 [ 141.390579][ T8486] ? kmsan_get_metadata+0x116/0x180 [ 141.395785][ T8486] ? kmsan_get_metadata+0x116/0x180 [ 141.400993][ T8486] ? kmsan_set_origin_checked+0x95/0xf0 [ 141.406545][ T8486] ? kmsan_get_metadata+0x116/0x180 [ 141.411861][ T8486] ? kmsan_get_metadata+0x116/0x180 [ 141.417053][ T8486] ? kmsan_get_metadata+0x116/0x180 [ 141.422255][ T8486] ? kmsan_get_metadata+0x116/0x180 [ 141.427446][ T8486] hci_rx_work+0x6df/0xd30 [ 141.431865][ T8486] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 141.437671][ T8486] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 141.443733][ T8486] ? hci_alloc_dev+0x2680/0x2680 [ 141.448758][ T8486] process_one_work+0x1688/0x2140 [ 141.453788][ T8486] worker_thread+0x10bc/0x2730 [ 141.458543][ T8486] ? kmsan_get_metadata+0x116/0x180 [ 141.463733][ T8486] ? kmsan_get_metadata+0x116/0x180 [ 141.468933][ T8486] kthread+0x551/0x590 [ 141.472994][ T8486] ? process_one_work+0x2140/0x2140 [ 141.478196][ T8486] ? kthread_blkcg+0x110/0x110 [ 141.482951][ T8486] ret_from_fork+0x1f/0x30 [ 141.488491][ T8486] Kernel Offset: disabled [ 141.492811][ T8486] Rebooting in 86400 seconds..