[....] 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[   14.769823] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   19.462187] random: sshd: uninitialized urandom read (32 bytes read)
[   19.665012] random: sshd: uninitialized urandom read (32 bytes read)
[   20.180615] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.14' (ECDSA) to the list of known hosts.
[   25.916742] urandom_read: 1 callbacks suppressed
[   25.916745] random: sshd: uninitialized urandom read (32 bytes read)
executing program
executing program
executing program
[   26.139209] ------------[ cut here ]------------
[   26.144007] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760
[   26.152501] Kernel panic - not syncing: panic_on_warn set ...
[   26.152501] 
[   26.159852] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.124-g09eb2ba #83
[   26.166840] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   26.176175]  ffff8801db207cc0 ffffffff81eb95e9 ffffffff83c48ac0 00000000ffffffff
[   26.184266]  0000000000000000 0000000000000000 00000000000000a7 ffff8801db207d80
[   26.192408]  ffffffff81423eb5 0000000041b58ab3 ffffffff843bb8e8 ffffffff81423cf6
[   26.200640] Call Trace:
[   26.203205]  <IRQ> [   26.205249]  [<ffffffff81eb95e9>] dump_stack+0xc1/0x128
[   26.210618]  [<ffffffff81423eb5>] panic+0x1bf/0x3bc
[   26.215609]  [<ffffffff81423cf6>] ? add_taint.cold.6+0x16/0x16
[   26.221556]  [<ffffffff81424186>] ? __warn.cold.9+0xa6/0x17f
[   26.227335]  [<ffffffff8342c878>] ? inet_sock_destruct+0x598/0x760
[   26.233765]  [<ffffffff814241a1>] __warn.cold.9+0xc1/0x17f
[   26.239373]  [<ffffffff836c4fef>] ? l2tp_tunnel_closeall+0x2af/0x350
[   26.245849]  [<ffffffff811383bc>] warn_slowpath_null+0x2c/0x40
[   26.251811]  [<ffffffff8342c878>] inet_sock_destruct+0x598/0x760
[   26.257932]  [<ffffffff8342c2e0>] ? ipv4_mib_init_net+0x570/0x570
[   26.264162]  [<ffffffff836c5839>] l2tp_tunnel_destruct+0x339/0x590
[   26.270528]  [<ffffffff836c56aa>] ? l2tp_tunnel_destruct+0x1aa/0x590
[   26.277002]  [<ffffffff836c5500>] ? l2tp_tunnel_del_work+0x470/0x470
[   26.283473]  [<ffffffff830281f5>] __sk_destruct+0x55/0x590
[   26.289080]  [<ffffffff812899ee>] rcu_process_callbacks+0x8ae/0x12b0
[   26.295559]  [<ffffffff81289ace>] ? rcu_process_callbacks+0x98e/0x12b0
[   26.302201]  [<ffffffff830281a0>] ? sock_set_timeout+0x210/0x210
[   26.308322]  [<ffffffff83a085c0>] __do_softirq+0x210/0x940
[   26.313947]  [<ffffffff8114d554>] irq_exit+0x114/0x150
[   26.319204]  [<ffffffff83a071a1>] smp_apic_timer_interrupt+0x81/0xa0
[   26.325674]  [<ffffffff83a03330>] apic_timer_interrupt+0xa0/0xb0
[   26.331791]  <EOI> [   26.333834]  [<ffffffff83a00606>] ? native_safe_halt+0x6/0x10
[   26.339824]  [<ffffffff839ffc45>] default_idle+0x55/0x360
[   26.345346]  [<ffffffff8106ae20>] arch_cpu_idle+0x10/0x20
[   26.350864]  [<ffffffff83a00a65>] default_idle_call+0x45/0x60
[   26.356729]  [<ffffffff81225495>] cpu_startup_entry+0x2b5/0x380
[   26.362905]  [<ffffffff812251e0>] ? cpu_in_idle+0x20/0x20
[   26.368421]  [<ffffffff839ed8cc>] rest_init+0x183/0x189
[   26.373767]  [<ffffffff84c98943>] start_kernel+0x67e/0x6b2
[   26.379370]  [<ffffffff84c982c5>] ? thread_stack_cache_init+0xb/0xb
[   26.386187]  [<ffffffff81ee81e2>] ? x86_family+0x32/0x40
[   26.391619]  [<ffffffff84c97120>] ? early_idt_handler_array+0x120/0x120
[   26.398349]  [<ffffffff84c9729a>] x86_64_start_reservations+0x29/0x2b
[   26.404905]  [<ffffffff84c973db>] x86_64_start_kernel+0x13f/0x162
[   26.411584] Dumping ftrace buffer:
[   26.415139]    (ftrace buffer empty)
[   26.418836] Kernel Offset: disabled
[   26.422449] Rebooting in 86400 seconds..