[....] Starting enhanced syslogd: rsyslogd[ 10.756133] audit: type=1400 audit(1516135294.634:4): avc: denied { syslog } for pid=3168 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 '10.128.0.43' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 28.210433] ------------[ cut here ]------------ [ 28.211246] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 28.212388] Kernel panic - not syncing: panic_on_warn set ... [ 28.212388] [ 28.213384] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.76-g8dec074 #13 [ 28.214312] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.215546] ffff8801db207cb8 ffffffff81d93169 ffffffff83a47180 ffff8801db207d90 [ 28.216770] ffffffff83f2e500 ffffffff832e9cb6 0000000000000009 ffff8801db207d80 [ 28.217991] ffffffff8142e371 0000000041b58ab3 ffffffff84189690 ffffffff8142e1b5 [ 28.219166] Call Trace: [ 28.219521] [ 28.219828] [] dump_stack+0xc1/0x128 [ 28.220598] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 28.221453] [] panic+0x1bc/0x3a8 [ 28.222139] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 28.223236] [] ? load_image_and_restore+0xf9/0xf9 [ 28.224096] [] ? debug_object_deactivate+0x3c0/0x3c0 [ 28.225039] [] ? __warn+0x1a9/0x1e0 [ 28.225742] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 28.226595] [] __warn+0x1c4/0x1e0 [ 28.227273] [] warn_slowpath_null+0x2c/0x40 [ 28.228080] [] inet_sock_destruct+0x5f6/0x7b0 [ 28.228909] [] ? ipv4_mib_init_net+0x560/0x560 [ 28.229751] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 28.230863] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 28.237323] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 28.243786] [] __sk_destruct+0x53/0x570 [ 28.249383] [] rcu_process_callbacks+0x898/0x1300 [ 28.255844] [] ? rcu_process_callbacks+0x977/0x1300 [ 28.262478] [] ? __sk_dst_check+0x240/0x240 [ 28.268418] [] __do_softirq+0x206/0x951 [ 28.274019] [] irq_exit+0x165/0x190 [ 28.279273] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 28.285751] [] apic_timer_interrupt+0xa0/0xb0 [ 28.291870] [ 28.293905] [] ? native_safe_halt+0x6/0x10 [ 28.299773] [] default_idle+0x55/0x360 [ 28.305280] [] arch_cpu_idle+0xa/0x10 [ 28.310699] [] default_idle_call+0x36/0x60 [ 28.316556] [] cpu_startup_entry+0x2b0/0x380 [ 28.322581] [] ? cpu_in_idle+0x20/0x20 [ 28.328089] [] rest_init+0x184/0x190 [ 28.333423] [] start_kernel+0x688/0x6bd [ 28.339016] [] ? thread_stack_cache_init+0xb/0xb [ 28.345390] [] ? early_idt_handler_array+0x120/0x120 [ 28.352109] [] x86_64_start_reservations+0x2a/0x2c [ 28.358654] [] x86_64_start_kernel+0x140/0x163 [ 28.365366] Dumping ftrace buffer: [ 28.368902] (ftrace buffer empty) [ 28.372582] Kernel Offset: disabled [ 28.376202] Rebooting in 86400 seconds..