[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   11.503738] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   16.658125] random: sshd: uninitialized urandom read (32 bytes read)
[   16.944695] random: sshd: uninitialized urandom read (32 bytes read)
[   17.495075] random: sshd: uninitialized urandom read (32 bytes read)
[   19.158729] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.11' (ECDSA) to the list of known hosts.
[   24.546199] random: sshd: uninitialized urandom read (32 bytes read)
executing program
executing program
executing program
[   24.770964] ------------[ cut here ]------------
[   24.775742] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760
[   24.784219] Kernel panic - not syncing: panic_on_warn set ...
[   24.784219] 
[   24.791584] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.117-g8b21e85 #71
[   24.798563] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   24.807889]  ffff8801db207cc0 ffffffff81eb4be9 ffffffff83c48980 00000000ffffffff
[   24.815861]  0000000000000000 0000000000000000 00000000000000a7 ffff8801db207d80
[   24.823834]  ffffffff81421c85 0000000041b58ab3 ffffffff843bc020 ffffffff81421ac6
[   24.831807] Call Trace:
[   24.834372]  <IRQ> [   24.836413]  [<ffffffff81eb4be9>] dump_stack+0xc1/0x128
[   24.841767]  [<ffffffff81421c85>] panic+0x1bf/0x3bc
[   24.846756]  [<ffffffff81421ac6>] ? add_taint.cold.6+0x16/0x16
[   24.852699]  [<ffffffff81421f56>] ? __warn.cold.9+0xa6/0x17f
[   24.858471]  [<ffffffff83427628>] ? inet_sock_destruct+0x598/0x760
[   24.864761]  [<ffffffff81421f71>] __warn.cold.9+0xc1/0x17f
[   24.870356]  [<ffffffff836c01cf>] ? l2tp_tunnel_closeall+0x2af/0x350
[   24.876822]  [<ffffffff8113683c>] warn_slowpath_null+0x2c/0x40
[   24.882774]  [<ffffffff83427628>] inet_sock_destruct+0x598/0x760
[   24.888892]  [<ffffffff83427090>] ? ipv4_mib_init_net+0x570/0x570
[   24.895106]  [<ffffffff836c0a19>] l2tp_tunnel_destruct+0x339/0x590
[   24.901394]  [<ffffffff836c088a>] ? l2tp_tunnel_destruct+0x1aa/0x590
[   24.907860]  [<ffffffff836c06e0>] ? l2tp_tunnel_del_work+0x470/0x470
[   24.914324]  [<ffffffff83023095>] __sk_destruct+0x55/0x590
[   24.919921]  [<ffffffff8128780e>] rcu_process_callbacks+0x8ae/0x12b0
[   24.926386]  [<ffffffff812878ee>] ? rcu_process_callbacks+0x98e/0x12b0
[   24.933024]  [<ffffffff83023040>] ? sock_set_timeout+0x210/0x210
[   24.939141]  [<ffffffff83a037fb>] __do_softirq+0x20b/0x937
[   24.944740]  [<ffffffff8114b277>] irq_exit+0x147/0x190
[   24.949990]  [<ffffffff83a023e1>] smp_apic_timer_interrupt+0x81/0xa0
[   24.956457]  [<ffffffff839fe570>] apic_timer_interrupt+0xa0/0xb0
[   24.962570]  <EOI> [   24.964605]  [<ffffffff839fb816>] ? native_safe_halt+0x6/0x10
[   24.970478]  [<ffffffff839fae55>] default_idle+0x55/0x360
[   24.975986]  [<ffffffff8106ae20>] arch_cpu_idle+0x10/0x20
[   24.981499]  [<ffffffff839fbc75>] default_idle_call+0x45/0x60
[   24.987360]  [<ffffffff81223215>] cpu_startup_entry+0x2b5/0x380
[   24.993399]  [<ffffffff81222f60>] ? cpu_in_idle+0x20/0x20
[   24.998921]  [<ffffffff839e8adc>] rest_init+0x183/0x189
[   25.004259]  [<ffffffff84c97943>] start_kernel+0x67e/0x6b2
[   25.009856]  [<ffffffff84c972c5>] ? thread_stack_cache_init+0xb/0xb
[   25.016234]  [<ffffffff81ee37a2>] ? x86_family+0x32/0x40
[   25.021676]  [<ffffffff84c96120>] ? early_idt_handler_array+0x120/0x120
[   25.028422]  [<ffffffff84c9629a>] x86_64_start_reservations+0x29/0x2b
[   25.034989]  [<ffffffff84c963db>] x86_64_start_kernel+0x13f/0x162
[   25.041577] Dumping ftrace buffer:
[   25.045114]    (ftrace buffer empty)
[   25.048800] Kernel Offset: disabled
[   25.052432] Rebooting in 86400 seconds..