[....] Starting enhanced syslogd: rsyslogd[ 11.432602] audit: type=1400 audit(1519222100.577:4): avc: denied { syslog } for pid=3513 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 '10.128.15.205' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "vcan0" RTNETLINK answers: Operation not supported Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" executing program executing program executing program syzkaller login: [ 42.861237] ------------[ cut here ]------------ [ 42.862023] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 42.863152] Kernel panic - not syncing: panic_on_warn set ... [ 42.863152] [ 42.864130] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.82-gcdfc8df #37 [ 42.865039] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.866274] ffff8801db207cb8 ffffffff81d94fc9 ffffffff83a48080 ffff8801db207d90 [ 42.867421] ffffffff83f2f800 ffffffff832ed6e6 0000000000000009 ffff8801db207d80 [ 42.868568] ffffffff8142f6c1 0000000041b58ab3 ffffffff8418b1f0 ffffffff8142f505 [ 42.869715] Call Trace: [ 42.870079] [ 42.870373] [] dump_stack+0xc1/0x128 [ 42.871138] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 42.871994] [] panic+0x1bc/0x3a8 [ 42.872665] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 42.873753] [] ? load_image_and_restore+0xf9/0xf9 [ 42.874610] [] ? __warn+0x1a9/0x1e0 [ 42.875311] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 42.876173] [] __warn+0x1c4/0x1e0 [ 42.876868] [] warn_slowpath_null+0x2c/0x40 [ 42.877657] [] inet_sock_destruct+0x5f6/0x7b0 [ 42.878498] [] ? trace_hardirqs_on+0xd/0x10 [ 42.879290] [] ? ipv4_mib_init_net+0x560/0x560 [ 42.880151] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 42.881004] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 42.882958] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 42.889420] [] __sk_destruct+0x53/0x570 [ 42.895013] [] rcu_process_callbacks+0x898/0x1300 [ 42.901475] [] ? rcu_process_callbacks+0x977/0x1300 [ 42.908109] [] ? __sk_dst_check+0x240/0x240 [ 42.914046] [] __do_softirq+0x206/0x951 [ 42.919640] [] irq_exit+0x165/0x190 [ 42.924888] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 42.931353] [] apic_timer_interrupt+0xa0/0xb0 [ 42.937470] [ 42.939504] [] ? native_safe_halt+0x6/0x10 [ 42.945370] [] default_idle+0x55/0x360 [ 42.950875] [] arch_cpu_idle+0xa/0x10 [ 42.956291] [] default_idle_call+0x36/0x60 [ 42.962142] [] cpu_startup_entry+0x2b0/0x380 [ 42.968174] [] ? cpu_in_idle+0x20/0x20 [ 42.973679] [] rest_init+0x184/0x190 [ 42.979013] [] start_kernel+0x688/0x6bd [ 42.984602] [] ? thread_stack_cache_init+0xb/0xb [ 42.990974] [] ? x86_family+0x32/0x40 [ 42.996392] [] ? early_idt_handler_array+0x120/0x120 [ 43.003110] [] x86_64_start_reservations+0x2a/0x2c [ 43.009657] [] x86_64_start_kernel+0x140/0x163 [ 43.016291] Dumping ftrace buffer: [ 43.019826] (ftrace buffer empty) [ 43.023515] Kernel Offset: disabled [ 43.027118] Rebooting in 86400 seconds..