[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 37.315373] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 38.087288] random: sshd: uninitialized urandom read (32 bytes read) [ 38.381330] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 39.290391] random: sshd: uninitialized urandom read (32 bytes read) [ 39.565784] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.24' (ECDSA) to the list of known hosts. [ 45.222289] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 67.053897] ================================================================== [ 67.061393] BUG: KMSAN: uninit-value in snd_midi_event_encode_byte+0x569/0xff0 [ 67.068823] CPU: 1 PID: 1659 Comm: kworker/1:1H Not tainted 4.19.0-rc1+ #40 [ 67.075949] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.085337] Workqueue: events_highpri snd_vmidi_output_work [ 67.091065] Call Trace: [ 67.093681] dump_stack+0x14b/0x190 [ 67.097340] kmsan_report+0x183/0x2b0 executing program executing program executing program executing program [ 67.101173] __msan_warning+0x70/0xc0 [ 67.105023] snd_midi_event_encode_byte+0x569/0xff0 [ 67.110083] snd_vmidi_output_work+0x34e/0x5b0 [ 67.114698] ? __list_del_entry_valid+0x123/0x440 [ 67.119573] ? snd_virmidi_output_trigger+0x1a0/0x1a0 [ 67.124798] ? snd_virmidi_output_trigger+0x1a0/0x1a0 [ 67.130021] process_one_work+0x1605/0x1f40 [ 67.134400] worker_thread+0x11a2/0x2590 [ 67.138542] kthread+0x465/0x4a0 [ 67.141953] ? process_one_work+0x1f40/0x1f40 [ 67.146526] ? kthread_blkcg+0xf0/0xf0 [ 67.150443] ret_from_fork+0x35/0x40 executing program executing program executing program [ 67.154191] [ 67.155829] Uninit was stored to memory at: [ 67.160173] kmsan_internal_chain_origin+0x128/0x210 [ 67.165299] __msan_chain_origin+0x69/0xc0 [ 67.169572] snd_rawmidi_transmit+0xa75/0xbf0 [ 67.174087] snd_vmidi_output_work+0x2ac/0x5b0 [ 67.178689] process_one_work+0x1605/0x1f40 [ 67.183036] worker_thread+0x11a2/0x2590 [ 67.187116] kthread+0x465/0x4a0 [ 67.190500] ret_from_fork+0x35/0x40 [ 67.194224] [ 67.195858] Uninit was created at: [ 67.199440] kmsan_internal_poison_shadow+0xb8/0x1b0 [ 67.204559] kmsan_kmalloc+0x98/0x100 [ 67.208378] __kmalloc_node+0x7bf/0x11c0 [ 67.212463] kvmalloc_node+0x19d/0x3e0 [ 67.216368] open_substream+0x3c8/0xaa0 [ 67.220363] rawmidi_open_priv+0x347/0x1000 [ 67.224705] snd_rawmidi_open+0x7d4/0x1120 [ 67.228959] soundcore_open+0x9be/0xa60 [ 67.232964] chrdev_open+0xc26/0xdb0 [ 67.236712] do_dentry_open+0xce6/0x1740 [ 67.240801] vfs_open+0xaf/0xe0 [ 67.244095] path_openat+0x1799/0x6870 [ 67.248018] do_filp_open+0x259/0x610 [ 67.251829] do_sys_open+0x630/0x940 [ 67.255565] __se_sys_open+0xad/0xc0 [ 67.259299] __x64_sys_open+0x4a/0x70 [ 67.263114] do_syscall_64+0xb8/0x100 [ 67.266918] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 67.272090] ================================================================== [ 67.279439] Disabling lock debugging due to kernel taint [ 67.284912] Kernel panic - not syncing: panic_on_warn set ... [ 67.284912] [ 67.292298] CPU: 1 PID: 1659 Comm: kworker/1:1H Tainted: G B 4.19.0-rc1+ #40 [ 67.300796] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.310174] Workqueue: events_highpri snd_vmidi_output_work [ 67.315905] Call Trace: [ 67.318531] dump_stack+0x14b/0x190 [ 67.322191] panic+0x35d/0x8cb [ 67.325431] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 67.330913] kmsan_report+0x2a8/0x2b0 [ 67.334745] __msan_warning+0x70/0xc0 [ 67.338575] snd_midi_event_encode_byte+0x569/0xff0 [ 67.343663] snd_vmidi_output_work+0x34e/0x5b0 [ 67.348277] ? __list_del_entry_valid+0x123/0x440 [ 67.353141] ? snd_virmidi_output_trigger+0x1a0/0x1a0 [ 67.358350] ? snd_virmidi_output_trigger+0x1a0/0x1a0 [ 67.363578] process_one_work+0x1605/0x1f40 [ 67.367951] worker_thread+0x11a2/0x2590 [ 67.372114] kthread+0x465/0x4a0 [ 67.375498] ? process_one_work+0x1f40/0x1f40 [ 67.380037] ? kthread_blkcg+0xf0/0xf0 [ 67.383945] ret_from_fork+0x35/0x40 [ 67.388078] Dumping ftrace buffer: [ 67.391619] (ftrace buffer empty) [ 67.395313] Kernel Offset: disabled [ 67.398929] Rebooting in 86400 seconds..