[ 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: [ 83.100156][ T8424] sshd (8424) used greatest stack depth: 3816 bytes left Warning: Permanently added '10.128.1.15' (ECDSA) to the list of known hosts. [ 92.425399][ T32] audit: type=1400 audit(1596397847.407:8): avc: denied { execmem } for pid=8458 comm="syz-executor464" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 92.447121][ T8459] IPVS: ftp: loaded support on port[0] = 21 executing program [ 93.572165][ T2202] Bluetooth: hci0: unknown advertising packet type: 0x2b [ 93.572174][ T2202] ===================================================== [ 93.586255][ T2202] BUG: KMSAN: uninit-value in process_adv_report+0x781/0x2000 [ 93.593701][ T2202] CPU: 0 PID: 2202 Comm: kworker/u5:0 Not tainted 5.8.0-rc5-syzkaller #0 [ 93.602200][ T2202] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.612260][ T2202] Workqueue: hci0 hci_rx_work [ 93.616924][ T2202] Call Trace: [ 93.620212][ T2202] dump_stack+0x1df/0x240 [ 93.624535][ T2202] kmsan_report+0xf7/0x1e0 [ 93.628948][ T2202] __msan_warning+0x58/0xa0 [ 93.633447][ T2202] process_adv_report+0x781/0x2000 [ 93.638645][ T2202] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 93.644707][ T2202] hci_event_packet+0x1d08/0x33ee0 [ 93.649818][ T2202] ? kmsan_get_metadata+0x11d/0x180 [ 93.655006][ T2202] ? kmsan_set_origin_checked+0x95/0xf0 [ 93.660561][ T2202] ? kmsan_get_metadata+0x110/0x180 [ 93.665864][ T2202] ? hci_send_to_monitor+0x138/0x520 [ 93.671247][ T2202] ? kmsan_get_metadata+0x11d/0x180 [ 93.676439][ T2202] hci_rx_work+0x95f/0xce0 [ 93.680955][ T2202] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 93.686757][ T2202] ? hci_alloc_dev+0x2680/0x2680 [ 93.691683][ T2202] process_one_work+0x1540/0x1f30 [ 93.696714][ T2202] worker_thread+0xed2/0x23f0 [ 93.701388][ T2202] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 93.708234][ T2202] kthread+0x515/0x550 [ 93.712292][ T2202] ? process_one_work+0x1f30/0x1f30 [ 93.717480][ T2202] ? kthread_blkcg+0xf0/0xf0 [ 93.722058][ T2202] ret_from_fork+0x22/0x30 [ 93.726464][ T2202] [ 93.728773][ T2202] Uninit was created at: [ 93.733001][ T2202] kmsan_internal_poison_shadow+0x66/0xd0 [ 93.738706][ T2202] kmsan_slab_alloc+0x8a/0xe0 [ 93.743372][ T2202] __kmalloc_node_track_caller+0xb40/0x1200 [ 93.749272][ T2202] __alloc_skb+0x2fd/0xac0 [ 93.753674][ T2202] vhci_write+0x15b/0x800 [ 93.757990][ T2202] vfs_write+0xd98/0x1480 [ 93.762758][ T2202] ksys_write+0x267/0x450 [ 93.767086][ T2202] __se_sys_write+0x92/0xb0 [ 93.771577][ T2202] __ia32_sys_write+0x4a/0x70 [ 93.776241][ T2202] __do_fast_syscall_32+0x2aa/0x400 [ 93.781424][ T2202] do_fast_syscall_32+0x6b/0xd0 [ 93.786266][ T2202] do_SYSENTER_32+0x73/0x90 [ 93.790759][ T2202] entry_SYSENTER_compat_after_hwframe+0x4d/0x5c [ 93.797067][ T2202] ===================================================== [ 93.804005][ T2202] Disabling lock debugging due to kernel taint [ 93.810344][ T2202] Kernel panic - not syncing: panic_on_warn set ... [ 93.816938][ T2202] CPU: 0 PID: 2202 Comm: kworker/u5:0 Tainted: G B 5.8.0-rc5-syzkaller #0 [ 93.826724][ T2202] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.836867][ T2202] Workqueue: hci0 hci_rx_work [ 93.841529][ T2202] Call Trace: [ 93.844811][ T2202] dump_stack+0x1df/0x240 [ 93.849134][ T2202] panic+0x3d5/0xc3e [ 93.853127][ T2202] kmsan_report+0x1df/0x1e0 [ 93.857627][ T2202] __msan_warning+0x58/0xa0 [ 93.862129][ T2202] process_adv_report+0x781/0x2000 [ 93.867243][ T2202] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 93.873309][ T2202] hci_event_packet+0x1d08/0x33ee0 [ 93.878421][ T2202] ? kmsan_get_metadata+0x11d/0x180 [ 93.883617][ T2202] ? kmsan_set_origin_checked+0x95/0xf0 [ 93.889154][ T2202] ? kmsan_get_metadata+0x110/0x180 [ 93.894371][ T2202] ? hci_send_to_monitor+0x138/0x520 [ 93.899874][ T2202] ? kmsan_get_metadata+0x11d/0x180 [ 93.905086][ T2202] hci_rx_work+0x95f/0xce0 [ 93.909612][ T2202] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 93.915412][ T2202] ? hci_alloc_dev+0x2680/0x2680 [ 93.920351][ T2202] process_one_work+0x1540/0x1f30 [ 93.925386][ T2202] worker_thread+0xed2/0x23f0 [ 93.930059][ T2202] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 93.935867][ T2202] kthread+0x515/0x550 [ 93.939926][ T2202] ? process_one_work+0x1f30/0x1f30 [ 93.945122][ T2202] ? kthread_blkcg+0xf0/0xf0 [ 93.949704][ T2202] ret_from_fork+0x22/0x30 [ 93.955834][ T2202] Kernel Offset: 0x19000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 93.967459][ T2202] Rebooting in 86400 seconds..