[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   13.188613] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   16.636369] random: sshd: uninitialized urandom read (32 bytes read)
[   17.051147] random: sshd: uninitialized urandom read (32 bytes read)
[   17.993581] random: sshd: uninitialized urandom read (32 bytes read)
[   33.171924] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.15' (ECDSA) to the list of known hosts.
[   38.607519] random: sshd: uninitialized urandom read (32 bytes read)
executing program
executing program
executing program
[   38.846608] ------------[ cut here ]------------
[   38.851430] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760
[   38.859930] Kernel panic - not syncing: panic_on_warn set ...
[   38.859930] 
[   38.867270] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.116-g0137ea2 #70
[   38.874403] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   38.883734]  ffff8801db207cc0 ffffffff81eb46a9 ffffffff83c48980 00000000ffffffff
[   38.891719]  0000000000000000 0000000000000000 00000000000000a7 ffff8801db207d80
[   38.899725]  ffffffff81421a75 0000000041b58ab3 ffffffff843bbff8 ffffffff814218b6
[   38.907711] Call Trace:
[   38.910275]  <IRQ> [   38.912324]  [<ffffffff81eb46a9>] dump_stack+0xc1/0x128
[   38.917708]  [<ffffffff81421a75>] panic+0x1bf/0x3bc
[   38.922799]  [<ffffffff814218b6>] ? add_taint.cold.6+0x16/0x16
[   38.928744]  [<ffffffff81421d46>] ? __warn.cold.9+0xa6/0x17f
[   38.934518]  [<ffffffff83426628>] ? inet_sock_destruct+0x598/0x760
[   38.940809]  [<ffffffff81421d61>] __warn.cold.9+0xc1/0x17f
[   38.946424]  [<ffffffff836bf1cf>] ? l2tp_tunnel_closeall+0x2af/0x350
[   38.953499]  [<ffffffff8113683c>] warn_slowpath_null+0x2c/0x40
[   38.959442]  [<ffffffff83426628>] inet_sock_destruct+0x598/0x760
[   38.965564]  [<ffffffff83426090>] ? ipv4_mib_init_net+0x570/0x570
[   38.971786]  [<ffffffff836bfa19>] l2tp_tunnel_destruct+0x339/0x590
[   38.978077]  [<ffffffff836bf88a>] ? l2tp_tunnel_destruct+0x1aa/0x590
[   38.984543]  [<ffffffff836bf6e0>] ? l2tp_tunnel_del_work+0x470/0x470
[   38.991011]  [<ffffffff83022095>] __sk_destruct+0x55/0x590
[   38.996609]  [<ffffffff812877ce>] rcu_process_callbacks+0x8ae/0x12b0
[   39.003080]  [<ffffffff812878ae>] ? rcu_process_callbacks+0x98e/0x12b0
[   39.009725]  [<ffffffff83022040>] ? sock_set_timeout+0x210/0x210
[   39.015844]  [<ffffffff83a027fb>] __do_softirq+0x20b/0x937
[   39.021441]  [<ffffffff8114b277>] irq_exit+0x147/0x190
[   39.026688]  [<ffffffff83a013e1>] smp_apic_timer_interrupt+0x81/0xa0
[   39.033156]  [<ffffffff839fd570>] apic_timer_interrupt+0xa0/0xb0
[   39.039269]  <EOI> [   39.041308]  [<ffffffff839fa816>] ? native_safe_halt+0x6/0x10
[   39.047192]  [<ffffffff839f9e55>] default_idle+0x55/0x360
[   39.052703]  [<ffffffff8106ae20>] arch_cpu_idle+0x10/0x20
[   39.058212]  [<ffffffff839fac75>] default_idle_call+0x45/0x60
[   39.064075]  [<ffffffff812231d5>] cpu_startup_entry+0x2b5/0x380
[   39.070111]  [<ffffffff81222f20>] ? cpu_in_idle+0x20/0x20
[   39.075622]  [<ffffffff839e7adc>] rest_init+0x183/0x189
[   39.080970]  [<ffffffff84c97943>] start_kernel+0x67e/0x6b2
[   39.086566]  [<ffffffff84c972c5>] ? thread_stack_cache_init+0xb/0xb
[   39.092947]  [<ffffffff81ee3262>] ? x86_family+0x32/0x40
[   39.098371]  [<ffffffff84c96120>] ? early_idt_handler_array+0x120/0x120
[   39.105099]  [<ffffffff84c9629a>] x86_64_start_reservations+0x29/0x2b
[   39.111660]  [<ffffffff84c963db>] x86_64_start_kernel+0x13f/0x162
[   39.118337] Dumping ftrace buffer:
[   39.121907]    (ftrace buffer empty)
[   39.125600] Kernel Offset: disabled
[   39.129315] Rebooting in 86400 seconds..