[....] Starting enhanced syslogd: rsyslogd[ 13.479882] audit: type=1400 audit(1517504285.176:4): avc: denied { syslog } for pid=3915 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 '10.128.15.217' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 26.750766] ------------[ cut here ]------------ [ 26.755698] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 26.764225] Kernel panic - not syncing: panic_on_warn set ... [ 26.764225] [ 26.771582] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.79-g71f1469 #25 [ 26.778494] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.787827] ffff8801db207cb8 ffffffff81d94829 ffffffff83a47c40 ffff8801db207d90 [ 26.795806] ffffffff83f2f100 ffffffff832ec2d6 0000000000000009 ffff8801db207d80 [ 26.803774] ffffffff8142f531 0000000041b58ab3 ffffffff8418ab10 ffffffff8142f375 [ 26.811741] Call Trace: [ 26.814295] [ 26.816334] [] dump_stack+0xc1/0x128 [ 26.821688] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 26.827980] [] panic+0x1bc/0x3a8 [ 26.832981] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 26.841185] [] ? load_image_and_restore+0xf9/0xf9 [ 26.847652] [] ? __warn+0x1a9/0x1e0 [ 26.852899] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 26.859194] [] __warn+0x1c4/0x1e0 [ 26.864278] [] warn_slowpath_null+0x2c/0x40 [ 26.870306] [] inet_sock_destruct+0x5f6/0x7b0 [ 26.876440] [] ? trace_hardirqs_on+0xd/0x10 [ 26.882382] [] ? ipv4_mib_init_net+0x560/0x560 [ 26.888594] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 26.894884] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 26.901354] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 26.907815] [] __sk_destruct+0x53/0x570 [ 26.913422] [] rcu_process_callbacks+0x898/0x1300 [ 26.919884] [] ? rcu_process_callbacks+0x977/0x1300 [ 26.926521] [] ? __sk_dst_check+0x240/0x240 [ 26.932463] [] __do_softirq+0x206/0x951 [ 26.938057] [] irq_exit+0x165/0x190 [ 26.943302] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 26.949762] [] apic_timer_interrupt+0xa0/0xb0 [ 26.955880] [ 26.957917] [] ? native_safe_halt+0x6/0x10 [ 26.963789] [] default_idle+0x55/0x360 [ 26.969298] [] arch_cpu_idle+0xa/0x10 [ 26.974737] [] default_idle_call+0x36/0x60 [ 26.980603] [] cpu_startup_entry+0x2b0/0x380 [ 26.986635] [] ? cpu_in_idle+0x20/0x20 [ 26.992141] [] rest_init+0x184/0x190 [ 26.997495] [] start_kernel+0x688/0x6bd [ 27.003096] [] ? thread_stack_cache_init+0xb/0xb [ 27.009827] [] ? early_idt_handler_array+0x120/0x120 [ 27.016808] [] x86_64_start_reservations+0x2a/0x2c [ 27.023530] [] x86_64_start_kernel+0x140/0x163 [ 27.030344] Dumping ftrace buffer: [ 27.033883] (ftrace buffer empty) [ 27.037564] Kernel Offset: disabled [ 27.041171] Rebooting in 86400 seconds..