INIT: Entering runlevel: 2

[info] Using makefile-style concurrent boot in runlevel 2.
[....] 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[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added '10.128.0.5' (ECDSA) to the list of known hosts.
executing program
executing program
executing program
syzkaller login: [   26.812261] ------------[ cut here ]------------
[   26.817078] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760
[   26.825560] Kernel panic - not syncing: panic_on_warn set ...
[   26.825560] 
[   26.832910] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.95-gee0bcd6 #6
[   26.839731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   26.849063]  ffff8801db207cc0 ffffffff81eb0f89 ffffffff83a484a0 00000000ffffffff
[   26.857047]  0000000000000000 0000000000000000 00000000000000a7 ffff8801db207d80
[   26.865046]  ffffffff8141f945 0000000041b58ab3 ffffffff841b7cf8 ffffffff8141f786
[   26.873033] Call Trace:
[   26.875590]  <IRQ> [   26.877637]  [<ffffffff81eb0f89>] dump_stack+0xc1/0x128
[   26.882994]  [<ffffffff8141f945>] panic+0x1bf/0x3bc
[   26.887984]  [<ffffffff8141f786>] ? add_taint.cold.6+0x16/0x16
[   26.893929]  [<ffffffff8141fc16>] ? __warn.cold.9+0xa6/0x17f
[   26.899705]  [<ffffffff8341dc28>] ? inet_sock_destruct+0x598/0x760
[   26.905999]  [<ffffffff8141fc31>] __warn.cold.9+0xc1/0x17f
[   26.911599]  [<ffffffff836b5bef>] ? l2tp_tunnel_closeall+0x2af/0x350
[   26.918073]  [<ffffffff8113461c>] warn_slowpath_null+0x2c/0x40
[   26.924030]  [<ffffffff8341dc28>] inet_sock_destruct+0x598/0x760
[   26.930152]  [<ffffffff8341d690>] ? ipv4_mib_init_net+0x570/0x570
[   26.936363]  [<ffffffff836b6439>] l2tp_tunnel_destruct+0x339/0x590
[   26.942660]  [<ffffffff836b62aa>] ? l2tp_tunnel_destruct+0x1aa/0x590
[   26.949147]  [<ffffffff836b6100>] ? l2tp_tunnel_del_work+0x470/0x470
[   26.955622]  [<ffffffff8301b095>] __sk_destruct+0x55/0x590
[   26.961227]  [<ffffffff8128575e>] rcu_process_callbacks+0x8ae/0x12b0
[   26.967703]  [<ffffffff8128583e>] ? rcu_process_callbacks+0x98e/0x12b0
[   26.974352]  [<ffffffff8301b040>] ? sock_set_timeout+0x210/0x210
[   26.980487]  [<ffffffff839f8efb>] __do_softirq+0x20b/0x937
[   26.986089]  [<ffffffff81149037>] irq_exit+0x147/0x190
[   26.991342]  [<ffffffff839f7ae1>] smp_apic_timer_interrupt+0x81/0xa0
[   26.997810]  [<ffffffff839f3c70>] apic_timer_interrupt+0xa0/0xb0
[   27.003922]  <EOI> [   27.005962]  [<ffffffff839f0f16>] ? native_safe_halt+0x6/0x10
[   27.011838]  [<ffffffff839f0555>] default_idle+0x55/0x360
[   27.017358]  [<ffffffff81069fa0>] arch_cpu_idle+0x10/0x20
[   27.022882]  [<ffffffff839f1375>] default_idle_call+0x45/0x60
[   27.028743]  [<ffffffff81220e35>] cpu_startup_entry+0x2b5/0x380
[   27.034776]  [<ffffffff81220b80>] ? cpu_in_idle+0x20/0x20
[   27.040295]  [<ffffffff839de1dc>] rest_init+0x183/0x189
[   27.045643]  [<ffffffff84a96943>] start_kernel+0x67e/0x6b2
[   27.051244]  [<ffffffff84a962c5>] ? thread_stack_cache_init+0xb/0xb
[   27.057632]  [<ffffffff81edfb72>] ? x86_family+0x32/0x40
[   27.063061]  [<ffffffff84a95120>] ? early_idt_handler_array+0x120/0x120
[   27.069798]  [<ffffffff84a9529a>] x86_64_start_reservations+0x29/0x2b
[   27.076359]  [<ffffffff84a953db>] x86_64_start_kernel+0x13f/0x162
[   27.083168] Dumping ftrace buffer:
[   27.086763]    (ftrace buffer empty)
[   27.090449] Kernel Offset: disabled
[   27.094065] Rebooting in 86400 seconds..