[....] Starting enhanced syslogd: rsyslogd[ 11.141299] audit: type=1400 audit(1516437117.626:4): avc: denied { syslog } for pid=3177 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[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.215' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 18.786852] ------------[ cut here ]------------ [ 18.788099] WARNING: CPU: 0 PID: 3 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 18.789330] Kernel panic - not syncing: panic_on_warn set ... [ 18.789330] [ 18.790585] CPU: 0 PID: 3 Comm: ksoftirqd/0 Not tainted 4.9.77-ge12a9c4 #27 [ 18.791804] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 18.793565] ffff8801da357a40 ffffffff81d941c9 ffffffff83a47bc0 ffff8801da357b18 [ 18.795497] ffffffff83f2f000 ffffffff832ebc36 0000000000000009 ffff8801da357b08 [ 18.797064] ffffffff8142f3c1 0000000041b58ab3 ffffffff8418ab70 ffffffff8142f205 [ 18.798430] Call Trace: [ 18.799148] [] dump_stack+0xc1/0x128 [ 18.800187] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 18.801165] [] panic+0x1bc/0x3a8 [ 18.802320] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 18.803561] [] ? load_image_and_restore+0xf9/0xf9 [ 18.804459] [] ? debug_object_deactivate+0x3c0/0x3c0 [ 18.805417] [] ? __warn+0x1a9/0x1e0 [ 18.806330] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 18.809035] [] __warn+0x1c4/0x1e0 [ 18.814125] [] warn_slowpath_null+0x2c/0x40 [ 18.820087] [] inet_sock_destruct+0x5f6/0x7b0 [ 18.826225] [] ? ipv4_mib_init_net+0x560/0x560 [ 18.832450] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 18.838756] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 18.845238] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 18.851725] [] __sk_destruct+0x53/0x570 [ 18.857339] [] rcu_process_callbacks+0x898/0x1300 [ 18.863822] [] ? rcu_process_callbacks+0x977/0x1300 [ 18.870485] [] ? __sk_dst_check+0x240/0x240 [ 18.876451] [] __do_softirq+0x206/0x951 [ 18.882065] [] ? takeover_tasklets+0x760/0x760 [ 18.888291] [] run_ksoftirqd+0x2e/0x60 [ 18.893816] [] smpboot_thread_fn+0x5c1/0x8f0 [ 18.899863] [] ? sort_range+0x30/0x30 [ 18.905302] [] ? __kthread_parkme+0xcf/0x240 [ 18.911349] [] ? schedule+0x89/0x1b0 [ 18.916709] [] ? __kthread_parkme+0x175/0x240 [ 18.922850] [] kthread+0x26d/0x300 [ 18.928036] [] ? sort_range+0x30/0x30 [ 18.933484] [] ? kthread_park+0xa0/0xa0 [ 18.939111] [] ? kthread_park+0xa0/0xa0 [ 18.944727] [] ? kthread_park+0xa0/0xa0 [ 18.950349] [] ret_from_fork+0x59/0x70 [ 18.956403] Dumping ftrace buffer: [ 18.959947] (ftrace buffer empty) [ 18.963631] Kernel Offset: disabled [ 18.967235] Rebooting in 86400 seconds..