[....] Starting enhanced syslogd: rsyslogd[ 15.072798] audit: type=1400 audit(1517592605.085:4): avc: denied { syslog } for pid=3911 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 periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [....] 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 '10.128.0.29' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 28.400937] ------------[ cut here ]------------ [ 28.405720] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 28.414189] Kernel panic - not syncing: panic_on_warn set ... [ 28.414189] [ 28.421522] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.79-g71f1469 #34 [ 28.428416] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.437741] ffff8801db307cb8 ffffffff81d94829 ffffffff83a47c40 ffff8801db307d90 [ 28.445708] ffffffff83f2f100 ffffffff832ec2d6 0000000000000009 ffff8801db307d80 [ 28.453693] ffffffff8142f531 0000000041b58ab3 ffffffff8418ab10 ffffffff8142f375 [ 28.461672] Call Trace: [ 28.464228] [ 28.466276] [] dump_stack+0xc1/0x128 [ 28.471643] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 28.477932] [] panic+0x1bc/0x3a8 [ 28.482925] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 28.491137] [] ? load_image_and_restore+0xf9/0xf9 [ 28.497611] [] ? __warn+0x1a9/0x1e0 [ 28.502876] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 28.509179] [] __warn+0x1c4/0x1e0 [ 28.514254] [] warn_slowpath_null+0x2c/0x40 [ 28.520200] [] inet_sock_destruct+0x5f6/0x7b0 [ 28.526329] [] ? trace_hardirqs_on+0xd/0x10 [ 28.532277] [] ? ipv4_mib_init_net+0x560/0x560 [ 28.538483] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 28.544776] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 28.551239] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 28.557703] [] __sk_destruct+0x53/0x570 [ 28.563302] [] rcu_process_callbacks+0x898/0x1300 [ 28.569768] [] ? rcu_process_callbacks+0x977/0x1300 [ 28.576411] [] ? __sk_dst_check+0x240/0x240 [ 28.582359] [] __do_softirq+0x206/0x951 [ 28.587955] [] irq_exit+0x165/0x190 [ 28.593211] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 28.599685] [] apic_timer_interrupt+0xa0/0xb0 [ 28.605796] [ 28.607833] [] ? native_safe_halt+0x6/0x10 [ 28.613712] [] ? trace_hardirqs_on+0xd/0x10 [ 28.619653] [] default_idle+0x55/0x360 [ 28.625162] [] arch_cpu_idle+0xa/0x10 [ 28.630583] [] default_idle_call+0x36/0x60 [ 28.636447] [] cpu_startup_entry+0x2b0/0x380 [ 28.642480] [] ? cpu_in_idle+0x20/0x20 [ 28.647988] [] ? clockevents_register_device+0x123/0x200 [ 28.655061] [] start_secondary+0x303/0x3e0 [ 28.660922] [] ? set_cpu_sibling_map+0x11f0/0x11f0 [ 28.668005] Dumping ftrace buffer: [ 28.671593] (ftrace buffer empty) [ 28.675280] Kernel Offset: disabled [ 28.678886] Rebooting in 86400 seconds..