[....] Starting enhanced syslogd: rsyslogd[ 13.524700] audit: type=1400 audit(1517481146.281:4): avc: denied { syslog } for pid=3906 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 '10.128.15.207' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 27.110793] ------------[ cut here ]------------ [ 27.115566] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 27.124036] Kernel panic - not syncing: panic_on_warn set ... [ 27.124036] [ 27.131379] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.79-g71f1469 #25 [ 27.138274] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.147601] ffff8801db207cb8 ffffffff81d94829 ffffffff83a47c40 ffff8801db207d90 [ 27.155566] ffffffff83f2f100 ffffffff832ec2d6 0000000000000009 ffff8801db207d80 [ 27.163540] ffffffff8142f531 0000000041b58ab3 ffffffff8418ab10 ffffffff8142f375 [ 27.171508] Call Trace: [ 27.174064] [ 27.176098] [] dump_stack+0xc1/0x128 [ 27.181465] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 27.187754] [] panic+0x1bc/0x3a8 [ 27.192739] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 27.200937] [] ? load_image_and_restore+0xf9/0xf9 [ 27.207400] [] ? __warn+0x1a9/0x1e0 [ 27.212645] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 27.218930] [] __warn+0x1c4/0x1e0 [ 27.224000] [] warn_slowpath_null+0x2c/0x40 [ 27.229937] [] inet_sock_destruct+0x5f6/0x7b0 [ 27.236049] [] ? trace_hardirqs_on+0xd/0x10 [ 27.242014] [] ? ipv4_mib_init_net+0x560/0x560 [ 27.248217] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 27.254504] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 27.260965] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 27.267425] [] __sk_destruct+0x53/0x570 [ 27.273019] [] rcu_process_callbacks+0x898/0x1300 [ 27.279476] [] ? rcu_process_callbacks+0x977/0x1300 [ 27.286109] [] ? __sk_dst_check+0x240/0x240 [ 27.292397] [] __do_softirq+0x206/0x951 [ 27.297989] [] irq_exit+0x165/0x190 [ 27.303236] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 27.309698] [] apic_timer_interrupt+0xa0/0xb0 [ 27.315809] [ 27.317847] [] ? native_safe_halt+0x6/0x10 [ 27.323718] [] default_idle+0x55/0x360 [ 27.329223] [] arch_cpu_idle+0xa/0x10 [ 27.334645] [] default_idle_call+0x36/0x60 [ 27.340499] [] cpu_startup_entry+0x2b0/0x380 [ 27.346798] [] ? cpu_in_idle+0x20/0x20 [ 27.352307] [] rest_init+0x184/0x190 [ 27.357638] [] start_kernel+0x688/0x6bd [ 27.363231] [] ? thread_stack_cache_init+0xb/0xb [ 27.369606] [] ? early_idt_handler_array+0x120/0x120 [ 27.376327] [] x86_64_start_reservations+0x2a/0x2c [ 27.382875] [] x86_64_start_kernel+0x140/0x163 [ 27.389586] Dumping ftrace buffer: [ 27.393131] (ftrace buffer empty) [ 27.396808] Kernel Offset: disabled [ 27.400411] Rebooting in 86400 seconds..