[....] Starting enhanced syslogd: rsyslogd[ 12.444025] audit: type=1400 audit(1521689368.007:4): avc: denied { syslog } for pid=3646 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 '10.128.0.17' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 35.598770] ------------[ cut here ]------------ [ 35.603549] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 35.612037] Kernel panic - not syncing: panic_on_warn set ... [ 35.612037] [ 35.619373] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.88-g71df7bb #60 [ 35.626268] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.635602] ffff8801db207cb8 ffffffff81d95f19 ffffffff83a482a0 ffff8801db207d90 [ 35.643570] ffffffff83f2fd00 ffffffff832f0056 0000000000000009 ffff8801db207d80 [ 35.651540] ffffffff8142fa71 0000000041b58ab3 ffffffff8418bc48 ffffffff8142f8b5 [ 35.659511] Call Trace: [ 35.662061] [ 35.664099] [] dump_stack+0xc1/0x128 [ 35.669449] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 35.675742] [] panic+0x1bc/0x3a8 [ 35.680730] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 35.688946] [] ? load_image_and_restore+0xf9/0xf9 [ 35.695407] [] ? __warn+0x1a9/0x1e0 [ 35.700654] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 35.706939] [] __warn+0x1c4/0x1e0 [ 35.712008] [] warn_slowpath_null+0x2c/0x40 [ 35.717959] [] inet_sock_destruct+0x5f6/0x7b0 [ 35.724074] [] ? trace_hardirqs_on+0xd/0x10 [ 35.730016] [] ? ipv4_mib_init_net+0x560/0x560 [ 35.736215] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 35.742503] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 35.748961] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 35.755444] [] __sk_destruct+0x53/0x570 [ 35.761036] [] rcu_process_callbacks+0x898/0x1300 [ 35.767499] [] ? rcu_process_callbacks+0x977/0x1300 [ 35.774137] [] ? __sk_dst_check+0x240/0x240 [ 35.780082] [] __do_softirq+0x206/0x951 [ 35.785685] [] irq_exit+0x165/0x190 [ 35.790928] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 35.797400] [] apic_timer_interrupt+0xa0/0xb0 [ 35.803521] [ 35.805569] [] ? native_safe_halt+0x6/0x10 [ 35.811527] [] default_idle+0x55/0x360 [ 35.817033] [] arch_cpu_idle+0xa/0x10 [ 35.822453] [] default_idle_call+0x36/0x60 [ 35.828316] [] cpu_startup_entry+0x2b0/0x380 [ 35.834346] [] ? cpu_in_idle+0x20/0x20 [ 35.839855] [] rest_init+0x184/0x190 [ 35.845188] [] start_kernel+0x684/0x6b9 [ 35.850783] [] ? thread_stack_cache_init+0xb/0xb [ 35.857158] [] ? x86_family+0x32/0x40 [ 35.862578] [] ? early_idt_handler_array+0x120/0x120 [ 35.869310] [] x86_64_start_reservations+0x2a/0x2c [ 35.875858] [] x86_64_start_kernel+0x140/0x163 [ 35.882529] Dumping ftrace buffer: [ 35.886084] (ftrace buffer empty) [ 35.889770] Kernel Offset: disabled [ 35.893381] Rebooting in 86400 seconds..