[....] Starting enhanced syslogd: rsyslogd[ 13.736999] audit: type=1400 audit(1517487686.832:4): avc: denied { syslog } for pid=3910 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 '10.128.0.12' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 24.710668] ------------[ cut here ]------------ [ 24.715465] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 24.723957] Kernel panic - not syncing: panic_on_warn set ... [ 24.723957] [ 24.731300] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.79-g71f1469 #25 [ 24.738208] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.747538] ffff8801db307cb8 ffffffff81d94829 ffffffff83a47c40 ffff8801db307d90 [ 24.755517] ffffffff83f2f100 ffffffff832ec2d6 0000000000000009 ffff8801db307d80 [ 24.763481] ffffffff8142f531 0000000041b58ab3 ffffffff8418ab10 ffffffff8142f375 [ 24.771461] Call Trace: [ 24.774017] [ 24.776054] [] dump_stack+0xc1/0x128 [ 24.781423] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 24.787718] [] panic+0x1bc/0x3a8 [ 24.792708] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 24.800932] [] ? load_image_and_restore+0xf9/0xf9 [ 24.807421] [] ? __warn+0x1a9/0x1e0 [ 24.812671] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 24.818970] [] __warn+0x1c4/0x1e0 [ 24.824053] [] warn_slowpath_null+0x2c/0x40 [ 24.830020] [] inet_sock_destruct+0x5f6/0x7b0 [ 24.836147] [] ? trace_hardirqs_on+0xd/0x10 [ 24.842090] [] ? ipv4_mib_init_net+0x560/0x560 [ 24.848304] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 24.854593] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 24.861067] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 24.867542] [] __sk_destruct+0x53/0x570 [ 24.873145] [] rcu_process_callbacks+0x898/0x1300 [ 24.879620] [] ? rcu_process_callbacks+0x977/0x1300 [ 24.886260] [] ? __sk_dst_check+0x240/0x240 [ 24.892205] [] __do_softirq+0x206/0x951 [ 24.897806] [] irq_exit+0x165/0x190 [ 24.903056] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 24.909521] [] apic_timer_interrupt+0xa0/0xb0 [ 24.915639] [ 24.917679] [] ? native_safe_halt+0x6/0x10 [ 24.923555] [] ? trace_hardirqs_on+0xd/0x10 [ 24.929509] [] default_idle+0x55/0x360 [ 24.935025] [] arch_cpu_idle+0xa/0x10 [ 24.940451] [] default_idle_call+0x36/0x60 [ 24.946309] [] cpu_startup_entry+0x2b0/0x380 [ 24.952339] [] ? cpu_in_idle+0x20/0x20 [ 24.957857] [] ? clockevents_register_device+0x123/0x200 [ 24.964935] [] start_secondary+0x303/0x3e0 [ 24.970793] [] ? set_cpu_sibling_map+0x11f0/0x11f0 [ 24.977910] Dumping ftrace buffer: [ 24.981500] (ftrace buffer empty) [ 24.985191] Kernel Offset: disabled [ 24.988801] Rebooting in 86400 seconds..