[....] Starting enhanced syslogd: rsyslogd[ 13.070223] audit: type=1400 audit(1517194086.638:4): avc: denied { syslog } for pid=3183 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 '10.128.0.55' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 45.382766] ------------[ cut here ]------------ [ 45.387535] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 45.396002] Kernel panic - not syncing: panic_on_warn set ... [ 45.396002] [ 45.403331] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.78-g68d447c #23 [ 45.410222] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.419545] ffff8801db207cb8 ffffffff81d943a9 ffffffff83a47c40 ffff8801db207d90 [ 45.427529] ffffffff83f2f100 ffffffff832ebc36 0000000000000009 ffff8801db207d80 [ 45.435497] ffffffff8142f451 0000000041b58ab3 ffffffff8418ac30 ffffffff8142f295 [ 45.443459] Call Trace: [ 45.446005] [ 45.448040] [] dump_stack+0xc1/0x128 [ 45.453388] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 45.459673] [] panic+0x1bc/0x3a8 [ 45.464658] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 45.472852] [] ? load_image_and_restore+0xf9/0xf9 [ 45.479309] [] ? __warn+0x1a9/0x1e0 [ 45.484551] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 45.490832] [] __warn+0x1c4/0x1e0 [ 45.495900] [] warn_slowpath_null+0x2c/0x40 [ 45.501835] [] inet_sock_destruct+0x5f6/0x7b0 [ 45.507947] [] ? trace_hardirqs_on+0xd/0x10 [ 45.513886] [] ? ipv4_mib_init_net+0x560/0x560 [ 45.520083] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 45.526368] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 45.532825] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 45.539283] [] __sk_destruct+0x53/0x570 [ 45.544875] [] rcu_process_callbacks+0x898/0x1300 [ 45.551335] [] ? rcu_process_callbacks+0x977/0x1300 [ 45.557967] [] ? __sk_dst_check+0x240/0x240 [ 45.563902] [] __do_softirq+0x206/0x951 [ 45.569490] [] irq_exit+0x165/0x190 [ 45.574734] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 45.581193] [] apic_timer_interrupt+0xa0/0xb0 [ 45.587300] [ 45.589333] [] ? native_safe_halt+0x6/0x10 [ 45.595198] [] default_idle+0x55/0x360 [ 45.600703] [] arch_cpu_idle+0xa/0x10 [ 45.606119] [] default_idle_call+0x36/0x60 [ 45.611975] [] cpu_startup_entry+0x2b0/0x380 [ 45.617998] [] ? cpu_in_idle+0x20/0x20 [ 45.623502] [] rest_init+0x184/0x190 [ 45.628834] [] start_kernel+0x688/0x6bd [ 45.634426] [] ? thread_stack_cache_init+0xb/0xb [ 45.640884] [] ? early_idt_handler_array+0x120/0x120 [ 45.647602] [] x86_64_start_reservations+0x2a/0x2c [ 45.654149] [] x86_64_start_kernel+0x140/0x163 [ 45.660763] Dumping ftrace buffer: [ 45.664295] (ftrace buffer empty) [ 45.667974] Kernel Offset: disabled [ 45.671577] Rebooting in 86400 seconds..