[ OK ] Reached target Login Prompts. [ 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 Warning: Permanently added '10.128.0.144' (ECDSA) to the list of known hosts. syzkaller login: [ 152.380070][ T8488] IPVS: ftp: loaded support on port[0] = 21 executing program [ 152.485263][ T8495] ===================================================== [ 152.492284][ T8495] BUG: KMSAN: uninit-value in hci_event_packet+0x11e7/0x39d30 [ 152.499775][ T8495] CPU: 0 PID: 8495 Comm: kworker/u5:2 Not tainted 5.8.0-rc5-syzkaller #0 [ 152.508202][ T8495] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 152.518299][ T8495] Workqueue: hci0 hci_rx_work [ 152.523029][ T8495] Call Trace: [ 152.526354][ T8495] dump_stack+0x21c/0x280 [ 152.530725][ T8495] kmsan_report+0xf7/0x1e0 [ 152.535182][ T8495] __msan_warning+0x58/0xa0 [ 152.539721][ T8495] hci_event_packet+0x11e7/0x39d30 [ 152.544877][ T8495] ? kmsan_get_metadata+0x116/0x180 [ 152.550117][ T8495] ? kmsan_get_metadata+0x116/0x180 [ 152.555380][ T8495] ? kmsan_get_metadata+0x116/0x180 [ 152.560616][ T8495] hci_rx_work+0x6df/0xd30 [ 152.565074][ T8495] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 152.570923][ T8495] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 152.577031][ T8495] ? hci_alloc_dev+0x2680/0x2680 [ 152.582005][ T8495] process_one_work+0x1688/0x2140 [ 152.587091][ T8495] worker_thread+0x10bc/0x2730 [ 152.591879][ T8495] ? kmsan_get_metadata+0x116/0x180 [ 152.597111][ T8495] ? kmsan_get_metadata+0x116/0x180 [ 152.602359][ T8495] kthread+0x551/0x590 [ 152.606462][ T8495] ? process_one_work+0x2140/0x2140 [ 152.611686][ T8495] ? kthread_blkcg+0x110/0x110 [ 152.616492][ T8495] ret_from_fork+0x1f/0x30 [ 152.620974][ T8495] [ 152.623334][ T8495] Uninit was created at: [ 152.627672][ T8495] kmsan_internal_poison_shadow+0x66/0xd0 [ 152.633491][ T8495] kmsan_slab_alloc+0x8a/0xe0 [ 152.638703][ T8495] __kmalloc_node_track_caller+0xeab/0x12e0 [ 152.644655][ T8495] __alloc_skb+0x35f/0xb30 [ 152.649133][ T8495] vhci_write+0x18a/0x890 [ 152.653503][ T8495] vfs_write+0xf9a/0x17c0 [ 152.657866][ T8495] ksys_write+0x275/0x500 [ 152.662222][ T8495] __se_sys_write+0x92/0xb0 [ 152.666769][ T8495] __x64_sys_write+0x4a/0x70 [ 152.671434][ T8495] do_syscall_64+0xad/0x160 [ 152.676007][ T8495] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 152.681921][ T8495] ===================================================== [ 152.688880][ T8495] Disabling lock debugging due to kernel taint [ 152.695052][ T8495] Kernel panic - not syncing: panic_on_warn set ... [ 152.701691][ T8495] CPU: 0 PID: 8495 Comm: kworker/u5:2 Tainted: G B 5.8.0-rc5-syzkaller #0 [ 152.711518][ T8495] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 152.721638][ T8495] Workqueue: hci0 hci_rx_work [ 152.726348][ T8495] Call Trace: [ 152.729689][ T8495] dump_stack+0x21c/0x280 [ 152.734066][ T8495] panic+0x4d7/0xef7 [ 152.738029][ T8495] ? add_taint+0x17c/0x210 [ 152.742485][ T8495] kmsan_report+0x1df/0x1e0 [ 152.747023][ T8495] __msan_warning+0x58/0xa0 [ 152.751587][ T8495] hci_event_packet+0x11e7/0x39d30 [ 152.756733][ T8495] ? kmsan_get_metadata+0x116/0x180 [ 152.761961][ T8495] ? kmsan_get_metadata+0x116/0x180 [ 152.767213][ T8495] ? kmsan_get_metadata+0x116/0x180 [ 152.772441][ T8495] hci_rx_work+0x6df/0xd30 [ 152.776895][ T8495] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 152.782733][ T8495] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 152.788839][ T8495] ? hci_alloc_dev+0x2680/0x2680 [ 152.793813][ T8495] process_one_work+0x1688/0x2140 [ 152.798896][ T8495] worker_thread+0x10bc/0x2730 [ 152.803677][ T8495] ? kmsan_get_metadata+0x116/0x180 [ 152.808893][ T8495] ? kmsan_get_metadata+0x116/0x180 [ 152.814142][ T8495] kthread+0x551/0x590 [ 152.818234][ T8495] ? process_one_work+0x2140/0x2140 [ 152.823456][ T8495] ? kthread_blkcg+0x110/0x110 [ 152.828264][ T8495] ret_from_fork+0x1f/0x30 [ 152.833771][ T8495] Kernel Offset: disabled [ 152.838099][ T8495] Rebooting in 86400 seconds..