[....] 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[   16.218985] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   19.846703] random: sshd: uninitialized urandom read (32 bytes read)
[   20.122447] random: sshd: uninitialized urandom read (32 bytes read)
[   20.640789] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.61' (ECDSA) to the list of known hosts.
[   26.300157] urandom_read: 1 callbacks suppressed
[   26.300161] random: sshd: uninitialized urandom read (32 bytes read)
executing program
executing program
executing program
executing program
executing program
[   26.417490] ------------[ cut here ]------------
[   26.422309] WARNING: CPU: 0 PID: 3 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760
[   26.430829] Kernel panic - not syncing: panic_on_warn set ...
[   26.430829] 
[   26.438206] CPU: 0 PID: 3 Comm: ksoftirqd/0 Not tainted 4.9.123-g8dd3fc2 #31
[   26.445386] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   26.454723]  ffff8801d99efa48 ffffffff81eb9689 ffffffff83c48ac0 00000000ffffffff
[   26.462756]  0000000000000000 0000000000000000 00000000000000a7 ffff8801d99efb08
[   26.470795]  ffffffff81423f75 0000000041b58ab3 ffffffff843bb878 ffffffff81423db6
[   26.478834] Call Trace:
[   26.481413]  [<ffffffff81eb9689>] dump_stack+0xc1/0x128
[   26.486766]  [<ffffffff81423f75>] panic+0x1bf/0x3bc
[   26.491778]  [<ffffffff81423db6>] ? add_taint.cold.6+0x16/0x16
[   26.497735]  [<ffffffff81f222d0>] ? debug_object_deactivate+0x340/0x340
[   26.504472]  [<ffffffff81424246>] ? __warn.cold.9+0xa6/0x17f
[   26.510275]  [<ffffffff8342c778>] ? inet_sock_destruct+0x598/0x760
[   26.516588]  [<ffffffff81424261>] __warn.cold.9+0xc1/0x17f
[   26.522196]  [<ffffffff811383bc>] warn_slowpath_null+0x2c/0x40
[   26.528150]  [<ffffffff8342c778>] inet_sock_destruct+0x598/0x760
[   26.534274]  [<ffffffff8342c1e0>] ? ipv4_mib_init_net+0x570/0x570
[   26.540489]  [<ffffffff836c5ab9>] l2tp_tunnel_destruct+0x339/0x590
[   26.546790]  [<ffffffff836c592a>] ? l2tp_tunnel_destruct+0x1aa/0x590
[   26.553269]  [<ffffffff836c5780>] ? l2tp_tunnel_del_work+0x470/0x470
[   26.559766]  [<ffffffff830280f5>] __sk_destruct+0x55/0x590
[   26.565374]  [<ffffffff81289aae>] rcu_process_callbacks+0x8ae/0x12b0
[   26.571847]  [<ffffffff81289b8e>] ? rcu_process_callbacks+0x98e/0x12b0
[   26.578519]  [<ffffffff830280a0>] ? sock_set_timeout+0x210/0x210
[   26.584647]  [<ffffffff83a08880>] __do_softirq+0x210/0x940
[   26.590257]  [<ffffffff8114d2f0>] ? takeover_tasklets+0x780/0x780
[   26.596476]  [<ffffffff8114d320>] run_ksoftirqd+0x30/0x60
[   26.601996]  [<ffffffff811aa5a9>] smpboot_thread_fn+0x5c9/0x900
[   26.608036]  [<ffffffff811a9fe0>] ? sort_range+0x30/0x30
[   26.613471]  [<ffffffff8119ea2f>] ? __kthread_parkme+0xcf/0x240
[   26.619514]  [<ffffffff839f23c9>] ? schedule+0x89/0x1b0
[   26.624868]  [<ffffffff8119ead5>] ? __kthread_parkme+0x175/0x240
[   26.630996]  [<ffffffff8119f3cd>] kthread+0x26d/0x300
[   26.636168]  [<ffffffff811a9fe0>] ? sort_range+0x30/0x30
[   26.641598]  [<ffffffff8119f160>] ? kthread_park+0xa0/0xa0
[   26.647209]  [<ffffffff83a01dc4>] ? __switch_to_asm+0x34/0x70
[   26.653077]  [<ffffffff8119f160>] ? kthread_park+0xa0/0xa0
[   26.658683]  [<ffffffff8119f160>] ? kthread_park+0xa0/0xa0
[   26.664290]  [<ffffffff83a01e5c>] ret_from_fork+0x5c/0x70
[   26.670179] Dumping ftrace buffer:
[   26.673718]    (ftrace buffer empty)
[   26.677406] Kernel Offset: disabled
[   26.681014] Rebooting in 86400 seconds..