[....] Starting enhanced syslogd: rsyslogd[ 14.484890] audit: type=1400 audit(1517244700.352:4): avc: denied { syslog } for pid=3916 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 '10.128.0.36' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 26.413602] ------------[ cut here ]------------ [ 26.418417] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 26.426897] Kernel panic - not syncing: panic_on_warn set ... [ 26.426897] [ 26.434248] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.78-g7be1985 #33 [ 26.441143] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.450470] ffff8801db207cb8 ffffffff81d94409 ffffffff83a47c40 ffff8801db207d90 [ 26.458449] ffffffff83f2f100 ffffffff832ebc36 0000000000000009 ffff8801db207d80 [ 26.466418] ffffffff8142f4a1 0000000041b58ab3 ffffffff8418ac30 ffffffff8142f2e5 [ 26.474393] Call Trace: [ 26.476946] [ 26.478991] [] dump_stack+0xc1/0x128 [ 26.484348] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 26.490639] [] panic+0x1bc/0x3a8 [ 26.495627] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 26.503825] [] ? load_image_and_restore+0xf9/0xf9 [ 26.510289] [] ? __warn+0x1a9/0x1e0 [ 26.515549] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 26.521839] [] __warn+0x1c4/0x1e0 [ 26.526913] [] warn_slowpath_null+0x2c/0x40 [ 26.532856] [] inet_sock_destruct+0x5f6/0x7b0 [ 26.538975] [] ? trace_hardirqs_on+0xd/0x10 [ 26.544918] [] ? ipv4_mib_init_net+0x560/0x560 [ 26.551119] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 26.557405] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 26.563865] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 26.570328] [] __sk_destruct+0x53/0x570 [ 26.575928] [] rcu_process_callbacks+0x898/0x1300 [ 26.582407] [] ? rcu_process_callbacks+0x977/0x1300 [ 26.589063] [] ? __sk_dst_check+0x240/0x240 [ 26.595706] [] __do_softirq+0x206/0x951 [ 26.601309] [] irq_exit+0x165/0x190 [ 26.606564] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 26.613024] [] apic_timer_interrupt+0xa0/0xb0 [ 26.619136] [ 26.621170] [] ? native_safe_halt+0x6/0x10 [ 26.627043] [] default_idle+0x55/0x360 [ 26.632550] [] arch_cpu_idle+0xa/0x10 [ 26.637968] [] default_idle_call+0x36/0x60 [ 26.643829] [] cpu_startup_entry+0x2b0/0x380 [ 26.649855] [] ? cpu_in_idle+0x20/0x20 [ 26.655363] [] rest_init+0x184/0x190 [ 26.660698] [] start_kernel+0x688/0x6bd [ 26.666297] [] ? thread_stack_cache_init+0xb/0xb [ 26.672675] [] ? early_idt_handler_array+0x120/0x120 [ 26.679398] [] x86_64_start_reservations+0x2a/0x2c [ 26.685947] [] x86_64_start_kernel+0x140/0x163 [ 26.692697] Dumping ftrace buffer: [ 26.696237] (ftrace buffer empty) [ 26.699917] Kernel Offset: disabled [ 26.703518] Rebooting in 86400 seconds..