[....] Starting enhanced syslogd: rsyslogd[ 14.234256] audit: type=1400 audit(1517357788.955:4): avc: denied { syslog } for pid=3901 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 '10.128.0.25' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 26.306092] ------------[ cut here ]------------ [ 26.310895] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 26.319389] Kernel panic - not syncing: panic_on_warn set ... [ 26.319389] [ 26.326735] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.78-g7be1985 #24 [ 26.333632] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.342959] ffff8801db307cb8 ffffffff81d94409 ffffffff83a47c40 ffff8801db307d90 [ 26.350945] ffffffff83f2f100 ffffffff832ebc36 0000000000000009 ffff8801db307d80 [ 26.358932] ffffffff8142f4a1 0000000041b58ab3 ffffffff8418ac30 ffffffff8142f2e5 [ 26.366909] Call Trace: [ 26.369462] [ 26.371501] [] dump_stack+0xc1/0x128 [ 26.376858] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 26.383152] [] panic+0x1bc/0x3a8 [ 26.388147] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 26.396364] [] ? load_image_and_restore+0xf9/0xf9 [ 26.402841] [] ? __warn+0x1a9/0x1e0 [ 26.408100] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 26.414389] [] __warn+0x1c4/0x1e0 [ 26.419461] [] warn_slowpath_null+0x2c/0x40 [ 26.425402] [] inet_sock_destruct+0x5f6/0x7b0 [ 26.431521] [] ? trace_hardirqs_on+0xd/0x10 [ 26.437467] [] ? ipv4_mib_init_net+0x560/0x560 [ 26.443682] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 26.449973] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 26.456438] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 26.462904] [] __sk_destruct+0x53/0x570 [ 26.468506] [] rcu_process_callbacks+0x898/0x1300 [ 26.474969] [] ? rcu_process_callbacks+0x977/0x1300 [ 26.481607] [] ? __sk_dst_check+0x240/0x240 [ 26.487547] [] __do_softirq+0x206/0x951 [ 26.493144] [] irq_exit+0x165/0x190 [ 26.498396] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 26.504855] [] apic_timer_interrupt+0xa0/0xb0 [ 26.510966] [ 26.513005] [] ? native_safe_halt+0x6/0x10 [ 26.518876] [] ? trace_hardirqs_on+0xd/0x10 [ 26.524817] [] default_idle+0x55/0x360 [ 26.530324] [] arch_cpu_idle+0xa/0x10 [ 26.535743] [] default_idle_call+0x36/0x60 [ 26.541598] [] cpu_startup_entry+0x2b0/0x380 [ 26.547625] [] ? cpu_in_idle+0x20/0x20 [ 26.553134] [] ? clockevents_register_device+0x123/0x200 [ 26.560203] [] start_secondary+0x303/0x3e0 [ 26.566060] [] ? set_cpu_sibling_map+0x11f0/0x11f0 [ 26.573139] Dumping ftrace buffer: [ 26.576685] (ftrace buffer empty) [ 26.580366] Kernel Offset: disabled [ 26.583981] Rebooting in 86400 seconds..