[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   34.928482] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   37.443994] random: sshd: uninitialized urandom read (32 bytes read)
[   37.817172] random: sshd: uninitialized urandom read (32 bytes read)
[   38.799219] random: sshd: uninitialized urandom read (32 bytes read)
[   39.085952] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.15.232' (ECDSA) to the list of known hosts.
[   44.729625] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   45.067720] psmouse serio2: Failed to reset mouse on : -5
[   47.563716] misc userio: Buffer overflowed, userio client isn't keeping up
[   48.603658] ==================================================================
[   48.611047] BUG: KMSAN: uninit-value in synaptics_detect+0x1fa/0x2a0
[   48.617529] CPU: 1 PID: 41 Comm: kworker/1:2 Not tainted 4.19.0-rc1+ #42
[   48.624351] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   48.633698] Workqueue: events_long serio_handle_event
[   48.638882] Call Trace:
[   48.641457]  dump_stack+0x14b/0x190
[   48.645084]  kmsan_report+0x183/0x2b0
[   48.648885]  __msan_warning+0x70/0xc0
[   48.652681]  synaptics_detect+0x1fa/0x2a0
[   48.656825]  psmouse_extensions+0x10fd/0x3820
[   48.661317]  psmouse_switch_protocol+0x184/0xd90
[   48.666067]  psmouse_connect+0x1387/0x2290
[   48.670314]  serio_driver_probe+0xe3/0x150
[   48.674535]  ? psmouse_interrupt+0x1960/0x1960
[   48.679107]  ? serio_uevent+0x6e0/0x6e0
[   48.683075]  really_probe+0x19ae/0x2040
[   48.687049]  driver_probe_device+0x1b4/0x4f0
[   48.691454]  __device_attach_driver+0x632/0x750
[   48.696122]  bus_for_each_drv+0x27e/0x390
[   48.700257]  ? coredump_store+0xf0/0xf0
[   48.704223]  __device_attach+0x381/0x5e0
[   48.708280]  device_initial_probe+0x4a/0x60
[   48.712595]  bus_probe_device+0x137/0x390
[   48.716742]  device_add+0x2687/0x2c70
[   48.720553]  serio_handle_event+0x1d90/0x2700
[   48.725057]  ? serio_resume+0x2b0/0x2b0
[   48.729024]  process_one_work+0x1605/0x1f40
[   48.733354]  worker_thread+0x11a2/0x2590
[   48.737432]  kthread+0x465/0x4a0
[   48.740788]  ? process_one_work+0x1f40/0x1f40
[   48.745281]  ? kthread_blkcg+0xf0/0xf0
[   48.749162]  ret_from_fork+0x35/0x40
[   48.752877] 
[   48.754490] Local variable description: ----param@synaptics_detect
[   48.760786] Variable was created at:
[   48.764487]  synaptics_detect+0x50/0x2a0
[   48.768532]  psmouse_extensions+0x10fd/0x3820
[   48.773007] ==================================================================
[   48.780348] Disabling lock debugging due to kernel taint
[   48.785803] Kernel panic - not syncing: panic_on_warn set ...
[   48.785803] 
[   48.793161] CPU: 1 PID: 41 Comm: kworker/1:2 Tainted: G    B             4.19.0-rc1+ #42
[   48.801392] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   48.810747] Workqueue: events_long serio_handle_event
[   48.815923] Call Trace:
[   48.818500]  dump_stack+0x14b/0x190
[   48.822125]  panic+0x35d/0x8cb
[   48.825339]  ? psmouse_extensions+0x10fd/0x3820
[   48.830001]  ? __msan_metadata_ptr_for_store_1+0x13/0x20
[   48.835457]  kmsan_report+0x2a8/0x2b0
[   48.839258]  __msan_warning+0x70/0xc0
[   48.843053]  synaptics_detect+0x1fa/0x2a0
[   48.847196]  psmouse_extensions+0x10fd/0x3820
[   48.851703]  psmouse_switch_protocol+0x184/0xd90
[   48.856456]  psmouse_connect+0x1387/0x2290
[   48.860701]  serio_driver_probe+0xe3/0x150
[   48.864976]  ? psmouse_interrupt+0x1960/0x1960
[   48.869769]  ? serio_uevent+0x6e0/0x6e0
[   48.873737]  really_probe+0x19ae/0x2040
[   48.877713]  driver_probe_device+0x1b4/0x4f0
[   48.882115]  __device_attach_driver+0x632/0x750
[   48.886783]  bus_for_each_drv+0x27e/0x390
[   48.890920]  ? coredump_store+0xf0/0xf0
[   48.894892]  __device_attach+0x381/0x5e0
[   48.898951]  device_initial_probe+0x4a/0x60
[   48.903265]  bus_probe_device+0x137/0x390
[   48.907412]  device_add+0x2687/0x2c70
[   48.911219]  serio_handle_event+0x1d90/0x2700
[   48.915714]  ? serio_resume+0x2b0/0x2b0
[   48.919677]  process_one_work+0x1605/0x1f40
[   48.924022]  worker_thread+0x11a2/0x2590
[   48.928095]  kthread+0x465/0x4a0
[   48.931464]  ? process_one_work+0x1f40/0x1f40
[   48.935956]  ? kthread_blkcg+0xf0/0xf0
[   48.939833]  ret_from_fork+0x35/0x40
[   48.943959] Dumping ftrace buffer:
[   48.947491]    (ftrace buffer empty)
[   48.951188] Kernel Offset: disabled
[   48.954822] Rebooting in 86400 seconds..