[....] Starting enhanced syslogd: rsyslogd[ 12.976304] audit: type=1400 audit(1516449076.888:4): avc: denied { syslog } for pid=3173 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 '10.128.15.230' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 28.372752] ------------[ cut here ]------------ [ 28.377545] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 28.386025] Kernel panic - not syncing: panic_on_warn set ... [ 28.386025] [ 28.393358] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.77-ge12a9c4 #27 [ 28.400249] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.409576] ffff8801db307cb8 ffffffff81d941c9 ffffffff83a47bc0 ffff8801db307d90 [ 28.417558] ffffffff83f2f000 ffffffff832ebc36 0000000000000009 ffff8801db307d80 [ 28.425521] ffffffff8142f3c1 0000000041b58ab3 ffffffff8418ab70 ffffffff8142f205 [ 28.433489] Call Trace: [ 28.436040] [ 28.438075] [] dump_stack+0xc1/0x128 [ 28.443426] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 28.449720] [] panic+0x1bc/0x3a8 [ 28.454709] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 28.462913] [] ? load_image_and_restore+0xf9/0xf9 [ 28.469380] [] ? debug_object_deactivate+0x3c0/0x3c0 [ 28.476099] [] ? __warn+0x1a9/0x1e0 [ 28.481346] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 28.487633] [] __warn+0x1c4/0x1e0 [ 28.492703] [] warn_slowpath_null+0x2c/0x40 [ 28.498643] [] inet_sock_destruct+0x5f6/0x7b0 [ 28.504757] [] ? ipv4_mib_init_net+0x560/0x560 [ 28.510956] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 28.517241] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 28.523697] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 28.530159] [] __sk_destruct+0x53/0x570 [ 28.535750] [] rcu_process_callbacks+0x898/0x1300 [ 28.542216] [] ? rcu_process_callbacks+0x977/0x1300 [ 28.548849] [] ? __sk_dst_check+0x240/0x240 [ 28.554795] [] __do_softirq+0x206/0x951 [ 28.560387] [] irq_exit+0x165/0x190 [ 28.565630] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 28.572094] [] apic_timer_interrupt+0xa0/0xb0 [ 28.578200] [ 28.580235] [] ? native_safe_halt+0x6/0x10 [ 28.586104] [] ? trace_hardirqs_on+0xd/0x10 [ 28.592041] [] default_idle+0x55/0x360 [ 28.597548] [] arch_cpu_idle+0xa/0x10 [ 28.602965] [] default_idle_call+0x36/0x60 [ 28.608815] [] cpu_startup_entry+0x2b0/0x380 [ 28.614840] [] ? cpu_in_idle+0x20/0x20 [ 28.620346] [] ? clockevents_register_device+0x123/0x200 [ 28.627417] [] start_secondary+0x303/0x3e0 [ 28.633270] [] ? set_cpu_sibling_map+0x11f0/0x11f0 [ 28.640391] Dumping ftrace buffer: [ 28.643925] (ftrace buffer empty) [ 28.647611] Kernel Offset: disabled [ 28.651230] Rebooting in 86400 seconds..