[....] Starting enhanced syslogd: rsyslogd[ 11.484966] audit: type=1400 audit(1517193301.578:4): avc: denied { syslog } for pid=3193 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] 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 '10.128.0.43' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 25.488749] ------------[ cut here ]------------ [ 25.493555] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 25.502040] Kernel panic - not syncing: panic_on_warn set ... [ 25.502040] [ 25.509374] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.78-g68d447c #32 [ 25.516271] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.525609] ffff8801db307cb8 ffffffff81d943a9 ffffffff83a47c40 ffff8801db307d90 [ 25.533586] ffffffff83f2f100 ffffffff832ebc36 0000000000000009 ffff8801db307d80 [ 25.541596] ffffffff8142f451 0000000041b58ab3 ffffffff8418ac30 ffffffff8142f295 [ 25.549574] Call Trace: [ 25.552126] [ 25.554164] [] dump_stack+0xc1/0x128 [ 25.559515] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 25.565810] [] panic+0x1bc/0x3a8 [ 25.570798] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 25.578996] [] ? load_image_and_restore+0xf9/0xf9 [ 25.585458] [] ? __warn+0x1a9/0x1e0 [ 25.590706] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 25.597011] [] __warn+0x1c4/0x1e0 [ 25.602086] [] warn_slowpath_null+0x2c/0x40 [ 25.608029] [] inet_sock_destruct+0x5f6/0x7b0 [ 25.614163] [] ? trace_hardirqs_on+0xd/0x10 [ 25.620110] [] ? ipv4_mib_init_net+0x560/0x560 [ 25.626325] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 25.632613] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 25.639077] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 25.645543] [] __sk_destruct+0x53/0x570 [ 25.651153] [] rcu_process_callbacks+0x898/0x1300 [ 25.657627] [] ? rcu_process_callbacks+0x977/0x1300 [ 25.664264] [] ? __sk_dst_check+0x240/0x240 [ 25.670218] [] __do_softirq+0x206/0x951 [ 25.675813] [] irq_exit+0x165/0x190 [ 25.681058] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 25.687521] [] apic_timer_interrupt+0xa0/0xb0 [ 25.693632] [ 25.695678] [] ? native_safe_halt+0x6/0x10 [ 25.701562] [] ? trace_hardirqs_on+0xd/0x10 [ 25.707514] [] default_idle+0x55/0x360 [ 25.713032] [] arch_cpu_idle+0xa/0x10 [ 25.720145] [] default_idle_call+0x36/0x60 [ 25.726008] [] cpu_startup_entry+0x2b0/0x380 [ 25.732038] [] ? cpu_in_idle+0x20/0x20 [ 25.737549] [] ? clockevents_register_device+0x123/0x200 [ 25.744620] [] start_secondary+0x303/0x3e0 [ 25.750492] [] ? set_cpu_sibling_map+0x11f0/0x11f0 [ 25.757242] Dumping ftrace buffer: [ 25.760882] (ftrace buffer empty) [ 25.764577] Kernel Offset: disabled [ 25.768206] Rebooting in 86400 seconds..