[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   12.413299] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.
[   12.792732] random: sshd: uninitialized urandom read (32 bytes read)
[   12.920878] random: sshd: uninitialized urandom read (32 bytes read)

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   24.285493] urandom_read: 1 callbacks suppressed
[   24.285496] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.42' (ECDSA) to the list of known hosts.
[   29.761127] random: sshd: uninitialized urandom read (32 bytes read)
executing program
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[   29.880568] ------------[ cut here ]------------
[   29.885348] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760
[   29.893837] Kernel panic - not syncing: panic_on_warn set ...
[   29.893837] 
[   29.901177] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.124-g09eb2ba #31
[   29.908162] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   29.917496]  ffff8801db307cc0 ffffffff81eb95e9 ffffffff83c48ac0 00000000ffffffff
[   29.925494]  0000000000000000 0000000000000001 00000000000000a7 ffff8801db307d80
[   29.933504]  ffffffff81423eb5 0000000041b58ab3 ffffffff843bb8e8 ffffffff81423cf6
[   29.941907] Call Trace:
[   29.944467]  <IRQ> [   29.946518]  [<ffffffff81eb95e9>] dump_stack+0xc1/0x128
[   29.951921]  [<ffffffff81423eb5>] panic+0x1bf/0x3bc
[   29.956919]  [<ffffffff81423cf6>] ? add_taint.cold.6+0x16/0x16
[   29.962868]  [<ffffffff81424186>] ? __warn.cold.9+0xa6/0x17f
[   29.968644]  [<ffffffff8342c878>] ? inet_sock_destruct+0x598/0x760
[   29.974938]  [<ffffffff814241a1>] __warn.cold.9+0xc1/0x17f
[   29.980538]  [<ffffffff811383bc>] warn_slowpath_null+0x2c/0x40
[   29.986495]  [<ffffffff8342c878>] inet_sock_destruct+0x598/0x760
[   29.992613]  [<ffffffff8342c2e0>] ? ipv4_mib_init_net+0x570/0x570
[   29.998941]  [<ffffffff836c5839>] l2tp_tunnel_destruct+0x339/0x590
[   30.005244]  [<ffffffff836c56aa>] ? l2tp_tunnel_destruct+0x1aa/0x590
[   30.012134]  [<ffffffff836c5500>] ? l2tp_tunnel_del_work+0x470/0x470
[   30.018614]  [<ffffffff830281f5>] __sk_destruct+0x55/0x590
[   30.024223]  [<ffffffff812899ee>] rcu_process_callbacks+0x8ae/0x12b0
[   30.030692]  [<ffffffff81289ace>] ? rcu_process_callbacks+0x98e/0x12b0
[   30.037347]  [<ffffffff830281a0>] ? sock_set_timeout+0x210/0x210
[   30.043479]  [<ffffffff83a085c0>] __do_softirq+0x210/0x940
[   30.049078]  [<ffffffff8114d554>] irq_exit+0x114/0x150
[   30.054328]  [<ffffffff83a071a1>] smp_apic_timer_interrupt+0x81/0xa0
[   30.060797]  [<ffffffff83a03330>] apic_timer_interrupt+0xa0/0xb0
[   30.066924]  <EOI> [   30.068960]  [<ffffffff83a00606>] ? native_safe_halt+0x6/0x10
[   30.074840]  [<ffffffff812383ad>] ? trace_hardirqs_on+0xd/0x10
[   30.080788]  [<ffffffff839ffc45>] default_idle+0x55/0x360
[   30.086301]  [<ffffffff8106ae20>] arch_cpu_idle+0x10/0x20
[   30.091922]  [<ffffffff83a00a65>] default_idle_call+0x45/0x60
[   30.097781]  [<ffffffff81225495>] cpu_startup_entry+0x2b5/0x380
[   30.103814]  [<ffffffff812251e0>] ? cpu_in_idle+0x20/0x20
[   30.109473]  [<ffffffff810af308>] start_secondary+0x328/0x400
[   30.115335]  [<ffffffff810aefe0>] ? set_cpu_sibling_map+0x1340/0x1340
[   30.122292] Dumping ftrace buffer:
[   30.125833]    (ftrace buffer empty)
[   30.129524] Kernel Offset: disabled
[   30.133156] Rebooting in 86400 seconds..