[....] 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[   30.861971] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   32.773380] random: sshd: uninitialized urandom read (32 bytes read)
[   33.117886] random: sshd: uninitialized urandom read (32 bytes read)
[   34.454228] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.33' (ECDSA) to the list of known hosts.
[   40.015779] random: sshd: uninitialized urandom read (32 bytes read)
2018/07/03 00:35:49 fuzzer started
[   41.584756] random: cc1: uninitialized urandom read (8 bytes read)
2018/07/03 00:35:52 dialing manager at 10.128.0.26:36811
2018/07/03 00:35:56 syscalls: 1518
2018/07/03 00:35:56 code coverage: enabled
2018/07/03 00:35:56 comparison tracing: ioctl(KCOV_TRACE_CMP) failed: errno 524
2018/07/03 00:35:56 setuid sandbox: enabled
2018/07/03 00:35:56 namespace sandbox: enabled
2018/07/03 00:35:56 fault injection: enabled
2018/07/03 00:35:56 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2018/07/03 00:35:56 net packed injection: enabled
[   48.588215] random: crng init done
[  100.938179] ==================================================================
[  100.945614] BUG: KMSAN: uninit-value in sg_init_one+0x1f7/0x290
[  100.951653] CPU: 0 PID: 8 Comm: ksoftirqd/0 Not tainted 4.17.0+ #16
[  100.958032] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  100.967360] Call Trace:
[  100.969928]  dump_stack+0x185/0x1d0
[  100.973532]  kmsan_report+0x188/0x2a0
[  100.977309]  __msan_warning_32+0x70/0xc0
[  100.981347]  sg_init_one+0x1f7/0x290
[  100.985036]  try_fill_recv+0x6ed/0x2580
[  100.988988]  virtnet_poll+0xfe3/0x1420
[  100.992851]  ? kmsan_set_origin_inline+0x6b/0x120
[  100.997678]  ? refill_work+0x2c0/0x2c0
[  101.001543]  net_rx_action+0x766/0x1a80
[  101.005496]  ? net_tx_action+0xad0/0xad0
[  101.009541]  __do_softirq+0x592/0x979
[  101.013323]  ? ksoftirqd_should_run+0x30/0x30
[  101.017797]  run_ksoftirqd+0x24/0x40
[  101.021491]  smpboot_thread_fn+0x4ac/0x9a0
[  101.025714]  kthread+0x4db/0x6c0
[  101.029054]  ? cpu_report_death+0x1f0/0x1f0
[  101.033352]  ? kthread_blkcg+0xf0/0xf0
[  101.037234]  ret_from_fork+0x35/0x40
[  101.040920] 
[  101.042522] Local variable description: ----list@net_rx_action
[  101.048464] Variable was created at:
[  101.052153]  net_rx_action+0x6e/0x1a80
[  101.056014]  __do_softirq+0x592/0x979
[  101.059796] ==================================================================
[  101.067135] Disabling lock debugging due to kernel taint
[  101.072572] Kernel panic - not syncing: panic_on_warn set ...
[  101.072572] 
[  101.079911] CPU: 0 PID: 8 Comm: ksoftirqd/0 Tainted: G    B             4.17.0+ #16
[  101.087681] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  101.097010] Call Trace:
[  101.099580]  dump_stack+0x185/0x1d0
[  101.103184]  panic+0x3d0/0x990
[  101.106361]  kmsan_report+0x29e/0x2a0
[  101.110140]  __msan_warning_32+0x70/0xc0
[  101.114178]  sg_init_one+0x1f7/0x290
[  101.117872]  try_fill_recv+0x6ed/0x2580
[  101.121828]  virtnet_poll+0xfe3/0x1420
[  101.125692]  ? kmsan_set_origin_inline+0x6b/0x120
[  101.130512]  ? refill_work+0x2c0/0x2c0
[  101.134376]  net_rx_action+0x766/0x1a80
[  101.138330]  ? net_tx_action+0xad0/0xad0
[  101.142368]  __do_softirq+0x592/0x979
[  101.146147]  ? ksoftirqd_should_run+0x30/0x30
[  101.150618]  run_ksoftirqd+0x24/0x40
[  101.154316]  smpboot_thread_fn+0x4ac/0x9a0
[  101.158534]  kthread+0x4db/0x6c0
[  101.161876]  ? cpu_report_death+0x1f0/0x1f0
[  101.166177]  ? kthread_blkcg+0xf0/0xf0
[  101.170041]  ret_from_fork+0x35/0x40
[  101.174263] Dumping ftrace buffer:
[  101.177787]    (ftrace buffer empty)
[  101.181472] Kernel Offset: disabled
[  101.185074] Rebooting in 86400 seconds..