[....] Starting enhanced syslogd: rsyslogd[ 10.292390] audit: type=1400 audit(1516413521.506:4): 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 '10.128.0.16' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 20.084282] ------------[ cut here ]------------ [ 20.085016] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 20.086202] Kernel panic - not syncing: panic_on_warn set ... [ 20.086202] [ 20.087268] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.77-ge12a9c4 #27 [ 20.088196] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 20.089434] ffff8801db307cb8 ffffffff81d941c9 ffffffff83a47bc0 ffff8801db307d90 [ 20.090609] ffffffff83f2f000 ffffffff832ebc36 0000000000000009 ffff8801db307d80 [ 20.091769] ffffffff8142f3c1 0000000041b58ab3 ffffffff8418ab70 ffffffff8142f205 [ 20.092936] Call Trace: [ 20.093294] [ 20.093626] [] dump_stack+0xc1/0x128 [ 20.094414] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 20.095283] [] panic+0x1bc/0x3a8 [ 20.095950] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 20.097048] [] ? load_image_and_restore+0xf9/0xf9 [ 20.097906] [] ? __warn+0x1a9/0x1e0 [ 20.098605] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 20.099439] [] __warn+0x1c4/0x1e0 [ 20.100119] [] warn_slowpath_null+0x2c/0x40 [ 20.100913] [] inet_sock_destruct+0x5f6/0x7b0 [ 20.101735] [] ? trace_hardirqs_on+0xd/0x10 [ 20.102524] [] ? ipv4_mib_init_net+0x560/0x560 [ 20.103416] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 20.104253] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 20.105129] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 20.111587] [] __sk_destruct+0x53/0x570 [ 20.117180] [] rcu_process_callbacks+0x898/0x1300 [ 20.123642] [] ? rcu_process_callbacks+0x977/0x1300 [ 20.130280] [] ? __sk_dst_check+0x240/0x240 [ 20.136220] [] __do_softirq+0x206/0x951 [ 20.141809] [] irq_exit+0x165/0x190 [ 20.147055] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 20.153514] [] apic_timer_interrupt+0xa0/0xb0 [ 20.159622] [ 20.161653] [] ? native_safe_halt+0x6/0x10 [ 20.167521] [] ? trace_hardirqs_on+0xd/0x10 [ 20.173458] [] default_idle+0x55/0x360 [ 20.178962] [] arch_cpu_idle+0xa/0x10 [ 20.184379] [] default_idle_call+0x36/0x60 [ 20.190235] [] cpu_startup_entry+0x2b0/0x380 [ 20.196259] [] ? cpu_in_idle+0x20/0x20 [ 20.201763] [] ? clockevents_register_device+0x123/0x200 [ 20.208830] [] start_secondary+0x303/0x3e0 [ 20.214770] [] ? set_cpu_sibling_map+0x11f0/0x11f0 [ 20.221846] Dumping ftrace buffer: [ 20.225397] (ftrace buffer empty) [ 20.229076] Kernel Offset: disabled [ 20.232677] Rebooting in 86400 seconds..