[....] Starting enhanced syslogd: rsyslogd[ 12.489155] audit: type=1400 audit(1520764050.727:4): avc: denied { syslog } for pid=3453 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 '10.128.0.40' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 26.685499] ------------[ cut here ]------------ [ 26.690268] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 26.698746] Kernel panic - not syncing: panic_on_warn set ... [ 26.698746] [ 26.706098] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.86-g00db063 #52 [ 26.712995] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.722320] ffff8801db207cb8 ffffffff81d956f9 ffffffff83a480c0 ffff8801db207d90 [ 26.730302] ffffffff83f2fb00 ffffffff832eda06 0000000000000009 ffff8801db207d80 [ 26.738266] ffffffff8142f531 0000000041b58ab3 ffffffff8418b470 ffffffff8142f375 [ 26.746226] Call Trace: [ 26.748780] [ 26.750819] [] dump_stack+0xc1/0x128 [ 26.756172] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 26.762478] [] panic+0x1bc/0x3a8 [ 26.767464] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 26.775662] [] ? load_image_and_restore+0xf9/0xf9 [ 26.782133] [] ? __warn+0x1a9/0x1e0 [ 26.787379] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 26.793665] [] __warn+0x1c4/0x1e0 [ 26.798736] [] warn_slowpath_null+0x2c/0x40 [ 26.804677] [] inet_sock_destruct+0x5f6/0x7b0 [ 26.810790] [] ? trace_hardirqs_on+0xd/0x10 [ 26.816728] [] ? ipv4_mib_init_net+0x560/0x560 [ 26.822928] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 26.829215] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 26.835680] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 26.842143] [] __sk_destruct+0x53/0x570 [ 26.847738] [] rcu_process_callbacks+0x898/0x1300 [ 26.854198] [] ? rcu_process_callbacks+0x977/0x1300 [ 26.860831] [] ? __sk_dst_check+0x240/0x240 [ 26.866774] [] __do_softirq+0x206/0x951 [ 26.872370] [] irq_exit+0x165/0x190 [ 26.877623] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 26.884083] [] apic_timer_interrupt+0xa0/0xb0 [ 26.890194] [ 26.892315] [] ? native_safe_halt+0x6/0x10 [ 26.898186] [] default_idle+0x55/0x360 [ 26.903705] [] arch_cpu_idle+0xa/0x10 [ 26.909123] [] default_idle_call+0x36/0x60 [ 26.914984] [] cpu_startup_entry+0x2b0/0x380 [ 26.921010] [] ? cpu_in_idle+0x20/0x20 [ 26.926523] [] rest_init+0x184/0x190 [ 26.931856] [] start_kernel+0x688/0x6bd [ 26.937449] [] ? thread_stack_cache_init+0xb/0xb [ 26.943821] [] ? x86_family+0x32/0x40 [ 26.949242] [] ? early_idt_handler_array+0x120/0x120 [ 26.955969] [] x86_64_start_reservations+0x2a/0x2c [ 26.962523] [] x86_64_start_kernel+0x140/0x163 [ 26.969266] Dumping ftrace buffer: [ 26.972820] (ftrace buffer empty) [ 26.976499] Kernel Offset: disabled [ 26.980101] Rebooting in 86400 seconds..