[....] 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[   12.828151] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   17.204287] random: sshd: uninitialized urandom read (32 bytes read)
[   17.460014] random: sshd: uninitialized urandom read (32 bytes read)
[   17.935557] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.58' (ECDSA) to the list of known hosts.
[   23.510833] urandom_read: 1 callbacks suppressed
[   23.510836] random: sshd: uninitialized urandom read (32 bytes read)
executing program
executing program
executing program
[   23.737593] ------------[ cut here ]------------
[   23.742375] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760
[   23.750852] Kernel panic - not syncing: panic_on_warn set ...
[   23.750852] 
[   23.758202] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.118-g856452b #21
[   23.765187] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   23.774513]  ffff8801db307cc0 ffffffff81eb4b89 ffffffff83c48980 00000000ffffffff
[   23.782513]  0000000000000000 0000000000000001 00000000000000a7 ffff8801db307d80
[   23.790629]  ffffffff81421c25 0000000041b58ab3 ffffffff843bbfe8 ffffffff81421a66
[   23.798710] Call Trace:
[   23.801270]  <IRQ> [   23.803332]  [<ffffffff81eb4b89>] dump_stack+0xc1/0x128
[   23.808702]  [<ffffffff81421c25>] panic+0x1bf/0x3bc
[   23.813692]  [<ffffffff81421a66>] ? add_taint.cold.6+0x16/0x16
[   23.819638]  [<ffffffff81421ef6>] ? __warn.cold.9+0xa6/0x17f
[   23.825410]  [<ffffffff83427538>] ? inet_sock_destruct+0x598/0x760
[   23.831715]  [<ffffffff81421f11>] __warn.cold.9+0xc1/0x17f
[   23.837311]  [<ffffffff836c005f>] ? l2tp_tunnel_closeall+0x2af/0x350
[   23.843778]  [<ffffffff8113683c>] warn_slowpath_null+0x2c/0x40
[   23.849720]  [<ffffffff83427538>] inet_sock_destruct+0x598/0x760
[   23.855838]  [<ffffffff83426fa0>] ? ipv4_mib_init_net+0x570/0x570
[   23.862051]  [<ffffffff836c08a9>] l2tp_tunnel_destruct+0x339/0x590
[   23.868355]  [<ffffffff836c071a>] ? l2tp_tunnel_destruct+0x1aa/0x590
[   23.874976]  [<ffffffff836c0570>] ? l2tp_tunnel_del_work+0x470/0x470
[   23.881457]  [<ffffffff830230f5>] __sk_destruct+0x55/0x590
[   23.887109]  [<ffffffff812877ae>] rcu_process_callbacks+0x8ae/0x12b0
[   23.893584]  [<ffffffff8128788e>] ? rcu_process_callbacks+0x98e/0x12b0
[   23.900225]  [<ffffffff830230a0>] ? sock_set_timeout+0x210/0x210
[   23.906347]  [<ffffffff83a0367b>] __do_softirq+0x20b/0x937
[   23.911946]  [<ffffffff8114b277>] irq_exit+0x147/0x190
[   23.917197]  [<ffffffff83a02261>] smp_apic_timer_interrupt+0x81/0xa0
[   23.923674]  [<ffffffff839fe3f0>] apic_timer_interrupt+0xa0/0xb0
[   23.929788]  <EOI> [   23.931827]  [<ffffffff839fb6b6>] ? native_safe_halt+0x6/0x10
[   23.937710]  [<ffffffff81235c2d>] ? trace_hardirqs_on+0xd/0x10
[   23.943664]  [<ffffffff839facf5>] default_idle+0x55/0x360
[   23.949174]  [<ffffffff8106ae20>] arch_cpu_idle+0x10/0x20
[   23.954684]  [<ffffffff839fbb15>] default_idle_call+0x45/0x60
[   23.960556]  [<ffffffff812231b5>] cpu_startup_entry+0x2b5/0x380
[   23.966585]  [<ffffffff81222f00>] ? cpu_in_idle+0x20/0x20
[   23.972097]  [<ffffffff810aefa8>] start_secondary+0x328/0x400
[   23.977954]  [<ffffffff810aec80>] ? set_cpu_sibling_map+0x1300/0x1300
[   23.984940] Dumping ftrace buffer:
[   23.988476]    (ftrace buffer empty)
[   23.992161] Kernel Offset: disabled
[   23.995765] Rebooting in 86400 seconds..