[....] Starting enhanced syslogd: rsyslogd[ 10.341503] audit: type=1400 audit(1516136240.988:4): avc: denied { syslog } for pid=3181 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 '10.128.0.13' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 31.956256] ------------[ cut here ]------------ [ 31.957055] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 31.958190] Kernel panic - not syncing: panic_on_warn set ... [ 31.958190] [ 31.959159] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.76-g8dec074 #13 [ 31.960067] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.961289] ffff8801db307cb8 ffffffff81d93169 ffffffff83a47180 ffff8801db307d90 [ 31.962513] ffffffff83f2e500 ffffffff832e9cb6 0000000000000009 ffff8801db307d80 [ 31.963688] ffffffff8142e371 0000000041b58ab3 ffffffff84189690 ffffffff8142e1b5 [ 31.964832] Call Trace: [ 31.965187] [ 31.965477] [] dump_stack+0xc1/0x128 [ 31.966216] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 31.967063] [] panic+0x1bc/0x3a8 [ 31.967733] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 31.968831] [] ? load_image_and_restore+0xf9/0xf9 [ 31.969689] [] ? __warn+0x1a9/0x1e0 [ 31.970403] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 31.971258] [] __warn+0x1c4/0x1e0 [ 31.971952] [] warn_slowpath_null+0x2c/0x40 [ 31.972741] [] inet_sock_destruct+0x5f6/0x7b0 [ 31.973552] [] ? trace_hardirqs_on+0xd/0x10 [ 31.974353] [] ? ipv4_mib_init_net+0x560/0x560 [ 31.975177] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 31.976026] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 31.980399] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 31.986858] [] __sk_destruct+0x53/0x570 [ 31.992449] [] rcu_process_callbacks+0x898/0x1300 [ 31.998907] [] ? rcu_process_callbacks+0x977/0x1300 [ 32.005538] [] ? __sk_dst_check+0x240/0x240 [ 32.011477] [] __do_softirq+0x206/0x951 [ 32.017064] [] irq_exit+0x165/0x190 [ 32.022305] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 32.028767] [] apic_timer_interrupt+0xa0/0xb0 [ 32.034878] [ 32.036910] [] ? native_safe_halt+0x6/0x10 [ 32.042775] [] ? trace_hardirqs_on+0xd/0x10 [ 32.048713] [] default_idle+0x55/0x360 [ 32.054219] [] arch_cpu_idle+0xa/0x10 [ 32.059638] [] default_idle_call+0x36/0x60 [ 32.065486] [] cpu_startup_entry+0x2b0/0x380 [ 32.071510] [] ? cpu_in_idle+0x20/0x20 [ 32.077018] [] ? clockevents_register_device+0x123/0x200 [ 32.084085] [] start_secondary+0x303/0x3e0 [ 32.089935] [] ? set_cpu_sibling_map+0x11f0/0x11f0 [ 32.096939] Dumping ftrace buffer: [ 32.100464] (ftrace buffer empty) [ 32.104145] Kernel Offset: disabled [ 32.107750] Rebooting in 86400 seconds..