[....] Starting enhanced syslogd: rsyslogd[ 13.423662] audit: type=1400 audit(1517228795.956:4): avc: denied { syslog } for pid=3810 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 '10.128.0.38' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 25.035512] ------------[ cut here ]------------ [ 25.040302] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 25.048783] Kernel panic - not syncing: panic_on_warn set ... [ 25.048783] [ 25.056125] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.78-g68d447c #23 [ 25.063021] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.072349] ffff8801db207cb8 ffffffff81d943a9 ffffffff83a47c40 ffff8801db207d90 [ 25.080343] ffffffff83f2f100 ffffffff832ebc36 0000000000000009 ffff8801db207d80 [ 25.088331] ffffffff8142f451 0000000041b58ab3 ffffffff8418ac30 ffffffff8142f295 [ 25.096297] Call Trace: [ 25.098864] [ 25.100910] [] dump_stack+0xc1/0x128 [ 25.106262] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 25.112559] [] panic+0x1bc/0x3a8 [ 25.117547] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 25.125743] [] ? load_image_and_restore+0xf9/0xf9 [ 25.132217] [] ? __warn+0x1a9/0x1e0 [ 25.137467] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 25.143755] [] __warn+0x1c4/0x1e0 [ 25.148827] [] warn_slowpath_null+0x2c/0x40 [ 25.154768] [] inet_sock_destruct+0x5f6/0x7b0 [ 25.160884] [] ? trace_hardirqs_on+0xd/0x10 [ 25.166835] [] ? ipv4_mib_init_net+0x560/0x560 [ 25.173045] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 25.179338] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 25.185810] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 25.192296] [] __sk_destruct+0x53/0x570 [ 25.197910] [] rcu_process_callbacks+0x898/0x1300 [ 25.204371] [] ? rcu_process_callbacks+0x977/0x1300 [ 25.211007] [] ? __sk_dst_check+0x240/0x240 [ 25.216947] [] __do_softirq+0x206/0x951 [ 25.222548] [] irq_exit+0x165/0x190 [ 25.227792] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 25.234251] [] apic_timer_interrupt+0xa0/0xb0 [ 25.240362] [ 25.242400] [] ? native_safe_halt+0x6/0x10 [ 25.248268] [] default_idle+0x55/0x360 [ 25.253776] [] arch_cpu_idle+0xa/0x10 [ 25.259194] [] default_idle_call+0x36/0x60 [ 25.265047] [] cpu_startup_entry+0x2b0/0x380 [ 25.271071] [] ? cpu_in_idle+0x20/0x20 [ 25.276576] [] rest_init+0x184/0x190 [ 25.281908] [] start_kernel+0x688/0x6bd [ 25.287499] [] ? thread_stack_cache_init+0xb/0xb [ 25.293872] [] ? early_idt_handler_array+0x120/0x120 [ 25.300591] [] x86_64_start_reservations+0x2a/0x2c [ 25.307136] [] x86_64_start_kernel+0x140/0x163 [ 25.313862] Dumping ftrace buffer: [ 25.317407] (ftrace buffer empty) [ 25.321085] Kernel Offset: disabled [ 25.324687] Rebooting in 86400 seconds..