[....] Starting enhanced syslogd: rsyslogd[ 11.073830] audit: type=1400 audit(1516269345.703:4): avc: denied { syslog } for pid=3170 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 '10.128.0.18' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 19.224458] ------------[ cut here ]------------ [ 19.225217] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 19.226374] Kernel panic - not syncing: panic_on_warn set ... [ 19.226374] [ 19.227344] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.77-g033d019 #14 [ 19.228381] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.229706] ffff8801db207cb8 ffffffff81d941c9 ffffffff83a47bc0 ffff8801db207d90 [ 19.230914] ffffffff83f2f000 ffffffff832ebc16 0000000000000009 ffff8801db207d80 [ 19.232156] ffffffff8142f3c1 0000000041b58ab3 ffffffff8418ab70 ffffffff8142f205 [ 19.233376] Call Trace: [ 19.233751] [ 19.234083] [] dump_stack+0xc1/0x128 [ 19.234849] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 19.235710] [] panic+0x1bc/0x3a8 [ 19.236378] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 19.237478] [] ? load_image_and_restore+0xf9/0xf9 [ 19.238360] [] ? __warn+0x1a9/0x1e0 [ 19.239096] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 19.239959] [] __warn+0x1c4/0x1e0 [ 19.240717] [] warn_slowpath_null+0x2c/0x40 [ 19.241507] [] inet_sock_destruct+0x5f6/0x7b0 [ 19.242320] [] ? trace_hardirqs_on+0xd/0x10 [ 19.243129] [] ? ipv4_mib_init_net+0x560/0x560 [ 19.243973] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 19.244825] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 19.251285] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 19.257747] [] __sk_destruct+0x53/0x570 [ 19.263486] [] rcu_process_callbacks+0x898/0x1300 [ 19.269946] [] ? rcu_process_callbacks+0x977/0x1300 [ 19.276580] [] ? __sk_dst_check+0x240/0x240 [ 19.282522] [] __do_softirq+0x206/0x951 [ 19.288114] [] irq_exit+0x165/0x190 [ 19.293359] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 19.299821] [] apic_timer_interrupt+0xa0/0xb0 [ 19.305940] [ 19.307975] [] ? native_safe_halt+0x6/0x10 [ 19.313857] [] default_idle+0x55/0x360 [ 19.319372] [] arch_cpu_idle+0xa/0x10 [ 19.324789] [] default_idle_call+0x36/0x60 [ 19.330643] [] cpu_startup_entry+0x2b0/0x380 [ 19.336674] [] ? cpu_in_idle+0x20/0x20 [ 19.342190] [] rest_init+0x184/0x190 [ 19.347521] [] start_kernel+0x688/0x6bd [ 19.353116] [] ? thread_stack_cache_init+0xb/0xb [ 19.359504] [] ? early_idt_handler_array+0x120/0x120 [ 19.366231] [] x86_64_start_reservations+0x2a/0x2c [ 19.372777] [] x86_64_start_kernel+0x140/0x163 [ 19.379486] Dumping ftrace buffer: [ 19.383040] (ftrace buffer empty) [ 19.386718] Kernel Offset: disabled [ 19.390321] Rebooting in 86400 seconds..