[....] Starting enhanced syslogd: rsyslogd[ 15.765086] audit: type=1400 audit(1517746286.211:4): avc: denied { syslog } for pid=3648 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 '10.128.0.9' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 62.104569] ------------[ cut here ]------------ [ 62.109334] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 62.117807] Kernel panic - not syncing: panic_on_warn set ... [ 62.117807] [ 62.125136] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.80-gb30d2b5 #28 [ 62.132025] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.141347] ffff8801db207cb8 ffffffff81d94b69 ffffffff83a47c40 ffff8801db207d90 [ 62.149312] ffffffff83f2f100 ffffffff832ec2d6 0000000000000009 ffff8801db207d80 [ 62.157271] ffffffff8142f541 0000000041b58ab3 ffffffff8418ab20 ffffffff8142f385 [ 62.165241] Call Trace: [ 62.167799] [ 62.169835] [] dump_stack+0xc1/0x128 [ 62.175184] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 62.181470] [] panic+0x1bc/0x3a8 [ 62.186453] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 62.194651] [] ? load_image_and_restore+0xf9/0xf9 [ 62.201112] [] ? __warn+0x1a9/0x1e0 [ 62.206357] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 62.212638] [] __warn+0x1c4/0x1e0 [ 62.217708] [] warn_slowpath_null+0x2c/0x40 [ 62.223642] [] inet_sock_destruct+0x5f6/0x7b0 [ 62.229758] [] ? trace_hardirqs_on+0xd/0x10 [ 62.235693] [] ? ipv4_mib_init_net+0x560/0x560 [ 62.241892] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 62.248183] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 62.254642] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 62.261101] [] __sk_destruct+0x53/0x570 [ 62.266693] [] rcu_process_callbacks+0x898/0x1300 [ 62.273153] [] ? rcu_process_callbacks+0x977/0x1300 [ 62.279796] [] ? __sk_dst_check+0x240/0x240 [ 62.285737] [] __do_softirq+0x206/0x951 [ 62.291328] [] irq_exit+0x165/0x190 [ 62.296569] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 62.303027] [] apic_timer_interrupt+0xa0/0xb0 [ 62.309138] [ 62.311174] [] ? native_safe_halt+0x6/0x10 [ 62.317041] [] default_idle+0x55/0x360 [ 62.322546] [] arch_cpu_idle+0xa/0x10 [ 62.327966] [] default_idle_call+0x36/0x60 [ 62.333818] [] cpu_startup_entry+0x2b0/0x380 [ 62.339857] [] ? cpu_in_idle+0x20/0x20 [ 62.345364] [] rest_init+0x184/0x190 [ 62.350697] [] start_kernel+0x688/0x6bd [ 62.356287] [] ? thread_stack_cache_init+0xb/0xb [ 62.362679] [] ? early_idt_handler_array+0x120/0x120 [ 62.369400] [] x86_64_start_reservations+0x2a/0x2c [ 62.375948] [] x86_64_start_kernel+0x140/0x163 [ 62.382672] Dumping ftrace buffer: [ 62.386219] (ftrace buffer empty) [ 62.389900] Kernel Offset: disabled [ 62.393506] Rebooting in 86400 seconds..