[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   31.738674] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   34.836799] random: sshd: uninitialized urandom read (32 bytes read)
[   35.417344] random: sshd: uninitialized urandom read (32 bytes read)
[   36.793415] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.46' (ECDSA) to the list of known hosts.
[   42.400733] random: sshd: uninitialized urandom read (32 bytes read)
2018/07/02 17:44:51 fuzzer started
[   43.751940] random: cc1: uninitialized urandom read (8 bytes read)
2018/07/02 17:44:54 dialing manager at 10.128.0.26:36811
2018/07/02 17:44:59 syscalls: 1518
2018/07/02 17:44:59 code coverage: enabled
2018/07/02 17:44:59 comparison tracing: ioctl(KCOV_TRACE_CMP) failed: errno 524
2018/07/02 17:44:59 setuid sandbox: enabled
2018/07/02 17:44:59 namespace sandbox: enabled
2018/07/02 17:44:59 fault injection: enabled
2018/07/02 17:44:59 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2018/07/02 17:44:59 net packed injection: enabled
[   51.774613] random: crng init done
[  108.795606] ==================================================================
[  108.803040] BUG: KMSAN: uninit-value in ip_fast_csum+0x444/0x460
[  108.809192] CPU: 0 PID: 8 Comm: ksoftirqd/0 Not tainted 4.17.0+ #16
[  108.815601] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  108.824952] Call Trace:
[  108.827547]  dump_stack+0x185/0x1d0
[  108.831178]  kmsan_report+0x188/0x2a0
[  108.834977]  __msan_warning_32+0x70/0xc0
[  108.839035]  ip_fast_csum+0x444/0x460
[  108.842833]  ? inet_gso_segment+0x1c10/0x1c10
[  108.847326]  inet_gro_receive+0x6c9/0x1950
[  108.851567]  ? inet_gso_segment+0x1c10/0x1c10
[  108.856065]  dev_gro_receive+0x214c/0x32e0
[  108.860303]  ? kmsan_set_origin_inline+0x6b/0x120
[  108.865148]  napi_gro_receive+0x624/0xb60
[  108.869298]  receive_buf+0x4c96/0x6ae0
[  108.873196]  virtnet_poll+0x8ff/0x1420
[  108.877081]  ? kmsan_set_origin_inline+0x6b/0x120
[  108.881927]  ? refill_work+0x2c0/0x2c0
[  108.885815]  net_rx_action+0x766/0x1a80
[  108.889795]  ? net_tx_action+0xad0/0xad0
[  108.893854]  __do_softirq+0x592/0x979
[  108.897651]  ? ksoftirqd_should_run+0x30/0x30
[  108.902134]  run_ksoftirqd+0x24/0x40
[  108.905826]  smpboot_thread_fn+0x4ac/0x9a0
[  108.910039]  kthread+0x4db/0x6c0
[  108.913380]  ? cpu_report_death+0x1f0/0x1f0
[  108.917677]  ? kthread_blkcg+0xf0/0xf0
[  108.921559]  ret_from_fork+0x35/0x40
[  108.925254] 
[  108.926855] Uninit was created at:
[  108.930374]  kmsan_internal_poison_shadow+0xb8/0x1b0
[  108.935450]  kmsan_kmalloc+0x94/0x100
[  108.939226]  kmem_cache_alloc+0xa97/0xb70
[  108.943351]  __napi_alloc_skb+0x27c/0xa10
[  108.947472]  page_to_skb+0x141/0x1190
[  108.951247]  receive_buf+0xc98/0x6ae0
[  108.955021]  virtnet_poll+0x8ff/0x1420
[  108.958883]  net_rx_action+0x766/0x1a80
[  108.962833]  __do_softirq+0x592/0x979
[  108.966604] ==================================================================
[  108.973933] Disabling lock debugging due to kernel taint
[  108.979355] Kernel panic - not syncing: panic_on_warn set ...
[  108.979355] 
[  108.986693] CPU: 0 PID: 8 Comm: ksoftirqd/0 Tainted: G    B             4.17.0+ #16
[  108.994469] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  109.003799] Call Trace:
[  109.006363]  dump_stack+0x185/0x1d0
[  109.009967]  panic+0x3d0/0x990
[  109.013149]  kmsan_report+0x29e/0x2a0
[  109.016932]  __msan_warning_32+0x70/0xc0
[  109.020968]  ip_fast_csum+0x444/0x460
[  109.024745]  ? inet_gso_segment+0x1c10/0x1c10
[  109.029217]  inet_gro_receive+0x6c9/0x1950
[  109.033430]  ? inet_gso_segment+0x1c10/0x1c10
[  109.037910]  dev_gro_receive+0x214c/0x32e0
[  109.042122]  ? kmsan_set_origin_inline+0x6b/0x120
[  109.046943]  napi_gro_receive+0x624/0xb60
[  109.051071]  receive_buf+0x4c96/0x6ae0
[  109.054942]  virtnet_poll+0x8ff/0x1420
[  109.058805]  ? kmsan_set_origin_inline+0x6b/0x120
[  109.063623]  ? refill_work+0x2c0/0x2c0
[  109.067499]  net_rx_action+0x766/0x1a80
[  109.071461]  ? net_tx_action+0xad0/0xad0
[  109.075511]  __do_softirq+0x592/0x979
[  109.079290]  ? ksoftirqd_should_run+0x30/0x30
[  109.084020]  run_ksoftirqd+0x24/0x40
[  109.087711]  smpboot_thread_fn+0x4ac/0x9a0
[  109.091928]  kthread+0x4db/0x6c0
[  109.095274]  ? cpu_report_death+0x1f0/0x1f0
[  109.099666]  ? kthread_blkcg+0xf0/0xf0
[  109.103532]  ret_from_fork+0x35/0x40
[  109.107762] Dumping ftrace buffer:
[  109.111296]    (ftrace buffer empty)
[  109.114983] Kernel Offset: disabled
[  109.118595] Rebooting in 86400 seconds..