[....] Starting enhanced syslogd: rsyslogd[ 11.161029] audit: type=1400 audit(1516199380.418:4): avc: denied { syslog } for pid=3179 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 '10.128.0.14' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 19.571009] ------------[ cut here ]------------ [ 19.572588] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 19.574672] Kernel panic - not syncing: panic_on_warn set ... [ 19.574672] [ 19.576899] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.77-g033d019 #14 [ 19.579241] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.581552] ffff8801db207cb8 ffffffff81d941c9 ffffffff83a47bc0 ffff8801db207d90 [ 19.584164] ffffffff83f2f000 ffffffff832ebc16 0000000000000009 ffff8801db207d80 [ 19.586256] ffffffff8142f3c1 0000000041b58ab3 ffffffff8418ab70 ffffffff8142f205 [ 19.588483] Call Trace: [ 19.589332] [ 19.590023] [] dump_stack+0xc1/0x128 [ 19.593188] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 19.599486] [] panic+0x1bc/0x3a8 [ 19.604474] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 19.612674] [] ? load_image_and_restore+0xf9/0xf9 [ 19.619139] [] ? debug_object_deactivate+0x3c0/0x3c0 [ 19.625872] [] ? __warn+0x1a9/0x1e0 [ 19.631130] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 19.637419] [] __warn+0x1c4/0x1e0 [ 19.642493] [] warn_slowpath_null+0x2c/0x40 [ 19.648445] [] inet_sock_destruct+0x5f6/0x7b0 [ 19.654561] [] ? ipv4_mib_init_net+0x560/0x560 [ 19.660766] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 19.667066] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 19.673535] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 19.679998] [] __sk_destruct+0x53/0x570 [ 19.685594] [] rcu_process_callbacks+0x898/0x1300 [ 19.692055] [] ? rcu_process_callbacks+0x977/0x1300 [ 19.698688] [] ? __sk_dst_check+0x240/0x240 [ 19.704629] [] __do_softirq+0x206/0x951 [ 19.710225] [] irq_exit+0x165/0x190 [ 19.715480] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 19.721943] [] apic_timer_interrupt+0xa0/0xb0 [ 19.728054] [ 19.730090] [] ? native_safe_halt+0x6/0x10 [ 19.735959] [] default_idle+0x55/0x360 [ 19.741469] [] arch_cpu_idle+0xa/0x10 [ 19.746890] [] default_idle_call+0x36/0x60 [ 19.752746] [] cpu_startup_entry+0x2b0/0x380 [ 19.758771] [] ? cpu_in_idle+0x20/0x20 [ 19.764279] [] rest_init+0x184/0x190 [ 19.769612] [] start_kernel+0x688/0x6bd [ 19.775210] [] ? thread_stack_cache_init+0xb/0xb [ 19.781587] [] ? early_idt_handler_array+0x120/0x120 [ 19.788316] [] x86_64_start_reservations+0x2a/0x2c [ 19.794864] [] x86_64_start_kernel+0x140/0x163 [ 19.801623] Dumping ftrace buffer: [ 19.805191] (ftrace buffer empty) [ 19.808877] Kernel Offset: disabled [ 19.812481] Rebooting in 86400 seconds..