[....] Starting enhanced syslogd: rsyslogd[ 13.810773] audit: type=1400 audit(1517765758.562:4): avc: denied { syslog } for pid=3651 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 '10.128.0.31' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 26.431516] ------------[ cut here ]------------ [ 26.436306] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 26.444785] Kernel panic - not syncing: panic_on_warn set ... [ 26.444785] [ 26.452646] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.80-gb30d2b5 #36 [ 26.459539] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.468864] ffff8801db307cb8 ffffffff81d94b69 ffffffff83a47c40 ffff8801db307d90 [ 26.476863] ffffffff83f2f100 ffffffff832ec2d6 0000000000000009 ffff8801db307d80 [ 26.484836] ffffffff8142f541 0000000041b58ab3 ffffffff8418ab20 ffffffff8142f385 [ 26.492804] Call Trace: [ 26.495363] [ 26.497399] [] dump_stack+0xc1/0x128 [ 26.502754] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 26.509043] [] panic+0x1bc/0x3a8 [ 26.514028] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 26.522234] [] ? load_image_and_restore+0xf9/0xf9 [ 26.528702] [] ? __warn+0x1a9/0x1e0 [ 26.533953] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 26.540242] [] __warn+0x1c4/0x1e0 [ 26.545314] [] warn_slowpath_null+0x2c/0x40 [ 26.551256] [] inet_sock_destruct+0x5f6/0x7b0 [ 26.557371] [] ? trace_hardirqs_on+0xd/0x10 [ 26.563312] [] ? ipv4_mib_init_net+0x560/0x560 [ 26.569524] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 26.575818] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 26.582283] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 26.588759] [] __sk_destruct+0x53/0x570 [ 26.594359] [] rcu_process_callbacks+0x898/0x1300 [ 26.601254] [] ? rcu_process_callbacks+0x977/0x1300 [ 26.608717] [] ? __sk_dst_check+0x240/0x240 [ 26.614668] [] __do_softirq+0x206/0x951 [ 26.620283] [] irq_exit+0x165/0x190 [ 26.625554] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 26.632019] [] apic_timer_interrupt+0xa0/0xb0 [ 26.638131] [ 26.640165] [] ? native_safe_halt+0x6/0x10 [ 26.646042] [] ? trace_hardirqs_on+0xd/0x10 [ 26.651994] [] default_idle+0x55/0x360 [ 26.657504] [] arch_cpu_idle+0xa/0x10 [ 26.662938] [] default_idle_call+0x36/0x60 [ 26.668808] [] cpu_startup_entry+0x2b0/0x380 [ 26.674854] [] ? cpu_in_idle+0x20/0x20 [ 26.680366] [] ? clockevents_register_device+0x123/0x200 [ 26.687437] [] start_secondary+0x303/0x3e0 [ 26.693293] [] ? set_cpu_sibling_map+0x11f0/0x11f0 [ 26.700330] Dumping ftrace buffer: [ 26.703905] (ftrace buffer empty) [ 26.707590] Kernel Offset: disabled [ 26.711195] Rebooting in 86400 seconds..