[....] Starting enhanced syslogd: rsyslogd[ 10.475545] audit: type=1400 audit(1517135628.716:4): avc: denied { syslog } for pid=3174 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] 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 '10.128.0.36' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 33.195652] ------------[ cut here ]------------ [ 33.196408] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 33.197534] Kernel panic - not syncing: panic_on_warn set ... [ 33.197534] [ 33.198501] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.78-g68d447c #32 [ 33.199429] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.200651] ffff8801db307cb8 ffffffff81d943a9 ffffffff83a47c40 ffff8801db307d90 [ 33.201943] ffffffff83f2f100 ffffffff832ebc36 0000000000000009 ffff8801db307d80 [ 33.203156] ffffffff8142f451 0000000041b58ab3 ffffffff8418ac30 ffffffff8142f295 [ 33.204362] Call Trace: [ 33.204717] [ 33.205008] [] dump_stack+0xc1/0x128 [ 33.205736] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 33.206609] [] panic+0x1bc/0x3a8 [ 33.207291] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 33.208373] [] ? load_image_and_restore+0xf9/0xf9 [ 33.209229] [] ? debug_object_deactivate+0x3c0/0x3c0 [ 33.210135] [] ? __warn+0x1a9/0x1e0 [ 33.210837] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 33.211689] [] __warn+0x1c4/0x1e0 [ 33.212388] [] warn_slowpath_null+0x2c/0x40 [ 33.213179] [] inet_sock_destruct+0x5f6/0x7b0 [ 33.213993] [] ? ipv4_mib_init_net+0x560/0x560 [ 33.214834] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 33.215666] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 33.222062] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 33.228532] [] __sk_destruct+0x53/0x570 [ 33.234127] [] rcu_process_callbacks+0x898/0x1300 [ 33.240588] [] ? rcu_process_callbacks+0x977/0x1300 [ 33.247219] [] ? __sk_dst_check+0x240/0x240 [ 33.253160] [] __do_softirq+0x206/0x951 [ 33.258755] [] irq_exit+0x165/0x190 [ 33.264000] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 33.270464] [] apic_timer_interrupt+0xa0/0xb0 [ 33.276576] [ 33.278607] [] ? native_safe_halt+0x6/0x10 [ 33.284489] [] ? trace_hardirqs_on+0xd/0x10 [ 33.290429] [] default_idle+0x55/0x360 [ 33.295935] [] arch_cpu_idle+0xa/0x10 [ 33.301353] [] default_idle_call+0x36/0x60 [ 33.307204] [] cpu_startup_entry+0x2b0/0x380 [ 33.313238] [] ? cpu_in_idle+0x20/0x20 [ 33.318747] [] ? clockevents_register_device+0x123/0x200 [ 33.325817] [] start_secondary+0x303/0x3e0 [ 33.331672] [] ? set_cpu_sibling_map+0x11f0/0x11f0 [ 33.338653] Dumping ftrace buffer: [ 33.342196] (ftrace buffer empty) [ 33.345879] Kernel Offset: disabled [ 33.349485] Rebooting in 86400 seconds..