[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   15.883751] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   23.668764] random: sshd: uninitialized urandom read (32 bytes read)
[   24.000897] random: sshd: uninitialized urandom read (32 bytes read)
[   24.509822] random: sshd: uninitialized urandom read (32 bytes read)
[   41.006905] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.0' (ECDSA) to the list of known hosts.
[   46.566305] random: sshd: uninitialized urandom read (32 bytes read)
executing program
executing program
executing program
[   46.788664] ------------[ cut here ]------------
[   46.793558] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760
[   46.802051] Kernel panic - not syncing: panic_on_warn set ...
[   46.802051] 
[   46.809514] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.123-g8dd3fc2 #79
[   46.816505] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   46.825844]  ffff8801db307cc0 ffffffff81eb9689 ffffffff83c48ac0 00000000ffffffff
[   46.833909]  0000000000000000 0000000000000001 00000000000000a7 ffff8801db307d80
[   46.841915]  ffffffff81423f75 0000000041b58ab3 ffffffff843bb878 ffffffff81423db6
[   46.849994] Call Trace:
[   46.852558]  <IRQ> [   46.854606]  [<ffffffff81eb9689>] dump_stack+0xc1/0x128
[   46.859980]  [<ffffffff81423f75>] panic+0x1bf/0x3bc
[   46.865028]  [<ffffffff81423db6>] ? add_taint.cold.6+0x16/0x16
[   46.871032]  [<ffffffff81424246>] ? __warn.cold.9+0xa6/0x17f
[   46.876829]  [<ffffffff8342c778>] ? inet_sock_destruct+0x598/0x760
[   46.883140]  [<ffffffff81424261>] __warn.cold.9+0xc1/0x17f
[   46.888751]  [<ffffffff836c526f>] ? l2tp_tunnel_closeall+0x2af/0x350
[   46.895235]  [<ffffffff811383bc>] warn_slowpath_null+0x2c/0x40
[   46.901209]  [<ffffffff8342c778>] inet_sock_destruct+0x598/0x760
[   46.907346]  [<ffffffff8342c1e0>] ? ipv4_mib_init_net+0x570/0x570
[   46.913558]  [<ffffffff836c5ab9>] l2tp_tunnel_destruct+0x339/0x590
[   46.919860]  [<ffffffff836c592a>] ? l2tp_tunnel_destruct+0x1aa/0x590
[   46.926477]  [<ffffffff836c5780>] ? l2tp_tunnel_del_work+0x470/0x470
[   46.932955]  [<ffffffff830280f5>] __sk_destruct+0x55/0x590
[   46.938564]  [<ffffffff81289aae>] rcu_process_callbacks+0x8ae/0x12b0
[   46.945036]  [<ffffffff81289b8e>] ? rcu_process_callbacks+0x98e/0x12b0
[   46.951853]  [<ffffffff830280a0>] ? sock_set_timeout+0x210/0x210
[   46.957987]  [<ffffffff83a08880>] __do_softirq+0x210/0x940
[   46.963699]  [<ffffffff8114d554>] irq_exit+0x114/0x150
[   46.968964]  [<ffffffff83a07461>] smp_apic_timer_interrupt+0x81/0xa0
[   46.975437]  [<ffffffff83a035f0>] apic_timer_interrupt+0xa0/0xb0
[   46.981603]  <EOI> [   46.983658]  [<ffffffff83a008c6>] ? native_safe_halt+0x6/0x10
[   46.989541]  [<ffffffff81237f0d>] ? trace_hardirqs_on+0xd/0x10
[   46.995502]  [<ffffffff839fff05>] default_idle+0x55/0x360
[   47.001041]  [<ffffffff8106ae20>] arch_cpu_idle+0x10/0x20
[   47.006575]  [<ffffffff83a00d25>] default_idle_call+0x45/0x60
[   47.012514]  [<ffffffff81225495>] cpu_startup_entry+0x2b5/0x380
[   47.018559]  [<ffffffff812251e0>] ? cpu_in_idle+0x20/0x20
[   47.024082]  [<ffffffff810af308>] start_secondary+0x328/0x400
[   47.029950]  [<ffffffff810aefe0>] ? set_cpu_sibling_map+0x1340/0x1340
[   47.036919] Dumping ftrace buffer:
[   47.040483]    (ftrace buffer empty)
[   47.044174] Kernel Offset: disabled
[   47.047792] Rebooting in 86400 seconds..