[....] Starting enhanced syslogd: rsyslogd[   10.341503] audit: type=1400 audit(1516136240.988:4): avc:  denied  { syslog } for  pid=3181 comm="rsyslogd" capability=34  scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1
[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
Starting mcstransd: 
[....] Starting file context maintaining daemon: restorecond[?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 '10.128.0.13' (ECDSA) to the list of known hosts.
executing program
executing program
executing program
syzkaller login: [   31.956256] ------------[ cut here ]------------
[   31.957055] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0
[   31.958190] Kernel panic - not syncing: panic_on_warn set ...
[   31.958190] 
[   31.959159] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.76-g8dec074 #13
[   31.960067] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   31.961289]  ffff8801db307cb8 ffffffff81d93169 ffffffff83a47180 ffff8801db307d90
[   31.962513]  ffffffff83f2e500 ffffffff832e9cb6 0000000000000009 ffff8801db307d80
[   31.963688]  ffffffff8142e371 0000000041b58ab3 ffffffff84189690 ffffffff8142e1b5
[   31.964832] Call Trace:
[   31.965187]  <IRQ> [   31.965477]  [<ffffffff81d93169>] dump_stack+0xc1/0x128
[   31.966216]  [<ffffffff832e9cb6>] ? inet_sock_destruct+0x5f6/0x7b0
[   31.967063]  [<ffffffff8142e371>] panic+0x1bc/0x3a8
[   31.967733]  [<ffffffff8142e1b5>] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7
[   31.968831]  [<ffffffff8142efd5>] ? load_image_and_restore+0xf9/0xf9
[   31.969689]  [<ffffffff811300d9>] ? __warn+0x1a9/0x1e0
[   31.970403]  [<ffffffff832e9cb6>] ? inet_sock_destruct+0x5f6/0x7b0
[   31.971258]  [<ffffffff811300f4>] __warn+0x1c4/0x1e0
[   31.971952]  [<ffffffff8113035c>] warn_slowpath_null+0x2c/0x40
[   31.972741]  [<ffffffff832e9cb6>] inet_sock_destruct+0x5f6/0x7b0
[   31.973552]  [<ffffffff8123a72d>] ? trace_hardirqs_on+0xd/0x10
[   31.974353]  [<ffffffff832e96c0>] ? ipv4_mib_init_net+0x560/0x560
[   31.975177]  [<ffffffff835827e2>] l2tp_tunnel_destruct+0x352/0x5a0
[   31.976026]  [<ffffffff8358263a>] ? l2tp_tunnel_destruct+0x1aa/0x5a0
[   31.980399]  [<ffffffff83582490>] ? l2tp_tunnel_del_work+0x460/0x460
[   31.986858]  [<ffffffff82ee3033>] __sk_destruct+0x53/0x570
[   31.992449]  [<ffffffff812920a8>] rcu_process_callbacks+0x898/0x1300
[   31.998907]  [<ffffffff81292187>] ? rcu_process_callbacks+0x977/0x1300
[   32.005538]  [<ffffffff82ee2fe0>] ? __sk_dst_check+0x240/0x240
[   32.011477]  [<ffffffff838b76c6>] __do_softirq+0x206/0x951
[   32.017064]  [<ffffffff81145b75>] irq_exit+0x165/0x190
[   32.022305]  [<ffffffff838b62db>] smp_apic_timer_interrupt+0x7b/0xa0
[   32.028767]  [<ffffffff838b2560>] apic_timer_interrupt+0xa0/0xb0
[   32.034878]  <EOI> [   32.036910]  [<ffffffff838af6e6>] ? native_safe_halt+0x6/0x10
[   32.042775]  [<ffffffff8123a72d>] ? trace_hardirqs_on+0xd/0x10
[   32.048713]  [<ffffffff838aed15>] default_idle+0x55/0x360
[   32.054219]  [<ffffffff8106bbca>] arch_cpu_idle+0xa/0x10
[   32.059638]  [<ffffffff838afb26>] default_idle_call+0x36/0x60
[   32.065486]  [<ffffffff812254b0>] cpu_startup_entry+0x2b0/0x380
[   32.071510]  [<ffffffff81225200>] ? cpu_in_idle+0x20/0x20
[   32.077018]  [<ffffffff812d0a63>] ? clockevents_register_device+0x123/0x200
[   32.084085]  [<ffffffff810af803>] start_secondary+0x303/0x3e0
[   32.089935]  [<ffffffff810af500>] ? set_cpu_sibling_map+0x11f0/0x11f0
[   32.096939] Dumping ftrace buffer:
[   32.100464]    (ftrace buffer empty)
[   32.104145] Kernel Offset: disabled
[   32.107750] Rebooting in 86400 seconds..