[....] Starting enhanced syslogd: rsyslogd[ 13.592286] audit: type=1400 audit(1517915886.161:4): avc: denied { syslog } for pid=3656 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 '10.128.15.192' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 58.576519] ------------[ cut here ]------------ [ 58.581314] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 58.589812] Kernel panic - not syncing: panic_on_warn set ... [ 58.589812] [ 58.597147] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.80-gb30d2b5 #28 [ 58.604042] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.613378] ffff8801db207cb8 ffffffff81d94b69 ffffffff83a47c40 ffff8801db207d90 [ 58.621347] ffffffff83f2f100 ffffffff832ec2d6 0000000000000009 ffff8801db207d80 [ 58.629315] ffffffff8142f541 0000000041b58ab3 ffffffff8418ab20 ffffffff8142f385 [ 58.637296] Call Trace: [ 58.639845] [ 58.641881] [] dump_stack+0xc1/0x128 [ 58.647229] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 58.653520] [] panic+0x1bc/0x3a8 [ 58.658505] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 58.666701] [] ? load_image_and_restore+0xf9/0xf9 [ 58.673162] [] ? debug_object_deactivate+0x3c0/0x3c0 [ 58.679883] [] ? __warn+0x1a9/0x1e0 [ 58.685128] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 58.691417] [] __warn+0x1c4/0x1e0 [ 58.696487] [] warn_slowpath_null+0x2c/0x40 [ 58.702426] [] inet_sock_destruct+0x5f6/0x7b0 [ 58.708541] [] ? ipv4_mib_init_net+0x560/0x560 [ 58.714739] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 58.721025] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 58.727486] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 58.733945] [] __sk_destruct+0x53/0x570 [ 58.739537] [] rcu_process_callbacks+0x898/0x1300 [ 58.746010] [] ? rcu_process_callbacks+0x977/0x1300 [ 58.752645] [] ? __sk_dst_check+0x240/0x240 [ 58.758585] [] __do_softirq+0x206/0x951 [ 58.764177] [] irq_exit+0x165/0x190 [ 58.769421] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 58.775881] [] apic_timer_interrupt+0xa0/0xb0 [ 58.781989] [ 58.784026] [] ? native_safe_halt+0x6/0x10 [ 58.789894] [] default_idle+0x55/0x360 [ 58.795401] [] arch_cpu_idle+0xa/0x10 [ 58.800820] [] default_idle_call+0x36/0x60 [ 58.806676] [] cpu_startup_entry+0x2b0/0x380 [ 58.812704] [] ? cpu_in_idle+0x20/0x20 [ 58.818208] [] rest_init+0x184/0x190 [ 58.823539] [] start_kernel+0x688/0x6bd [ 58.829129] [] ? thread_stack_cache_init+0xb/0xb [ 58.835512] [] ? early_idt_handler_array+0x120/0x120 [ 58.842234] [] x86_64_start_reservations+0x2a/0x2c [ 58.848792] [] x86_64_start_kernel+0x140/0x163 [ 58.855515] Dumping ftrace buffer: [ 58.859063] (ftrace buffer empty) [ 58.862743] Kernel Offset: disabled [ 58.866354] Rebooting in 86400 seconds..