[....] Starting enhanced syslogd: rsyslogd[ 12.993382] audit: type=1400 audit(1517562650.575:4): avc: denied { syslog } for pid=3783 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 '10.128.15.196' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 24.370219] ------------[ cut here ]------------ [ 24.375002] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 24.383481] Kernel panic - not syncing: panic_on_warn set ... [ 24.383481] [ 24.390820] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.79-g71f1469 #34 [ 24.397717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.407062] ffff8801db207cb8 ffffffff81d94829 ffffffff83a47c40 ffff8801db207d90 [ 24.415018] ffffffff83f2f100 ffffffff832ec2d6 0000000000000009 ffff8801db207d80 [ 24.423068] ffffffff8142f531 0000000041b58ab3 ffffffff8418ab10 ffffffff8142f375 [ 24.431028] Call Trace: [ 24.433838] [ 24.435880] [] dump_stack+0xc1/0x128 [ 24.441236] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 24.447529] [] panic+0x1bc/0x3a8 [ 24.452512] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 24.460707] [] ? load_image_and_restore+0xf9/0xf9 [ 24.467166] [] ? __warn+0x1a9/0x1e0 [ 24.472411] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 24.478696] [] __warn+0x1c4/0x1e0 [ 24.483765] [] warn_slowpath_null+0x2c/0x40 [ 24.489703] [] inet_sock_destruct+0x5f6/0x7b0 [ 24.495827] [] ? trace_hardirqs_on+0xd/0x10 [ 24.501766] [] ? ipv4_mib_init_net+0x560/0x560 [ 24.507966] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 24.514259] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 24.520718] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 24.527177] [] __sk_destruct+0x53/0x570 [ 24.532767] [] rcu_process_callbacks+0x898/0x1300 [ 24.539224] [] ? rcu_process_callbacks+0x977/0x1300 [ 24.545855] [] ? __sk_dst_check+0x240/0x240 [ 24.551794] [] __do_softirq+0x206/0x951 [ 24.557384] [] irq_exit+0x165/0x190 [ 24.562627] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 24.569085] [] apic_timer_interrupt+0xa0/0xb0 [ 24.575196] [ 24.577321] [] ? native_safe_halt+0x6/0x10 [ 24.583186] [] default_idle+0x55/0x360 [ 24.588689] [] arch_cpu_idle+0xa/0x10 [ 24.594107] [] default_idle_call+0x36/0x60 [ 24.599956] [] cpu_startup_entry+0x2b0/0x380 [ 24.605990] [] ? cpu_in_idle+0x20/0x20 [ 24.611496] [] rest_init+0x184/0x190 [ 24.616834] [] start_kernel+0x688/0x6bd [ 24.622424] [] ? thread_stack_cache_init+0xb/0xb [ 24.628797] [] ? early_idt_handler_array+0x120/0x120 [ 24.635525] [] x86_64_start_reservations+0x2a/0x2c [ 24.642072] [] x86_64_start_kernel+0x140/0x163 [ 24.648762] Dumping ftrace buffer: [ 24.652305] (ftrace buffer empty) [ 24.655984] Kernel Offset: disabled [ 24.659588] Rebooting in 86400 seconds..