[....] Starting enhanced syslogd: rsyslogd[   13.131551] audit: type=1400 audit(1517787872.098:4): avc:  denied  { syslog } for  pid=3646 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 '10.128.0.51' (ECDSA) to the list of known hosts.
executing program
executing program
executing program
syzkaller login: [   97.475460] ------------[ cut here ]------------
[   97.480304] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0
[   97.488792] Kernel panic - not syncing: panic_on_warn set ...
[   97.488792] 
[   97.496125] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.80-gb30d2b5 #28
[   97.503018] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   97.512341]  ffff8801db307cb8 ffffffff81d94b69 ffffffff83a47c40 ffff8801db307d90
[   97.520333]  ffffffff83f2f100 ffffffff832ec2d6 0000000000000009 ffff8801db307d80
[   97.528344]  ffffffff8142f541 0000000041b58ab3 ffffffff8418ab20 ffffffff8142f385
[   97.536307] Call Trace:
[   97.538857]  <IRQ> [   97.540892]  [<ffffffff81d94b69>] dump_stack+0xc1/0x128
[   97.546251]  [<ffffffff832ec2d6>] ? inet_sock_destruct+0x5f6/0x7b0
[   97.552541]  [<ffffffff8142f541>] panic+0x1bc/0x3a8
[   97.557525]  [<ffffffff8142f385>] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7
[   97.565751]  [<ffffffff814301a5>] ? load_image_and_restore+0xf9/0xf9
[   97.572217]  [<ffffffff81131159>] ? __warn+0x1a9/0x1e0
[   97.577474]  [<ffffffff832ec2d6>] ? inet_sock_destruct+0x5f6/0x7b0
[   97.583760]  [<ffffffff81131174>] __warn+0x1c4/0x1e0
[   97.588833]  [<ffffffff811313dc>] warn_slowpath_null+0x2c/0x40
[   97.594771]  [<ffffffff832ec2d6>] inet_sock_destruct+0x5f6/0x7b0
[   97.600896]  [<ffffffff8123b85d>] ? trace_hardirqs_on+0xd/0x10
[   97.606836]  [<ffffffff832ebce0>] ? ipv4_mib_init_net+0x560/0x560
[   97.613044]  [<ffffffff83585212>] l2tp_tunnel_destruct+0x352/0x5a0
[   97.619334]  [<ffffffff8358506a>] ? l2tp_tunnel_destruct+0x1aa/0x5a0
[   97.625794]  [<ffffffff83584ec0>] ? l2tp_tunnel_del_work+0x460/0x460
[   97.632256]  [<ffffffff82ee5033>] __sk_destruct+0x53/0x570
[   97.637859]  [<ffffffff812931d8>] rcu_process_callbacks+0x898/0x1300
[   97.644320]  [<ffffffff812932b7>] ? rcu_process_callbacks+0x977/0x1300
[   97.650963]  [<ffffffff82ee4fe0>] ? __sk_dst_check+0x240/0x240
[   97.656906]  [<ffffffff838ba0c6>] __do_softirq+0x206/0x951
[   97.662496]  [<ffffffff81146bf5>] irq_exit+0x165/0x190
[   97.667752]  [<ffffffff838b8cdb>] smp_apic_timer_interrupt+0x7b/0xa0
[   97.674212]  [<ffffffff838b4f60>] apic_timer_interrupt+0xa0/0xb0
[   97.680843]  <EOI> [   97.682880]  [<ffffffff838b20c6>] ? native_safe_halt+0x6/0x10
[   97.688752]  [<ffffffff8123b85d>] ? trace_hardirqs_on+0xd/0x10
[   97.694692]  [<ffffffff838b16f5>] default_idle+0x55/0x360
[   97.700199]  [<ffffffff8106bc9a>] arch_cpu_idle+0xa/0x10
[   97.705617]  [<ffffffff838b2506>] default_idle_call+0x36/0x60
[   97.711483]  [<ffffffff812265e0>] cpu_startup_entry+0x2b0/0x380
[   97.717518]  [<ffffffff81226330>] ? cpu_in_idle+0x20/0x20
[   97.723039]  [<ffffffff812d1bd3>] ? clockevents_register_device+0x123/0x200
[   97.730107]  [<ffffffff810afd13>] start_secondary+0x303/0x3e0
[   97.735957]  [<ffffffff810afa10>] ? set_cpu_sibling_map+0x11f0/0x11f0
[   97.743042] Dumping ftrace buffer:
[   97.746587]    (ftrace buffer empty)
[   97.750266] Kernel Offset: disabled
[   97.753871] Rebooting in 86400 seconds..