[....] Starting enhanced syslogd: rsyslogd[ 13.394093] audit: type=1400 audit(1517029392.383:4): avc: denied { syslog } for pid=3169 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 '10.128.0.48' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 46.668444] ------------[ cut here ]------------ [ 46.673244] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 46.681728] Kernel panic - not syncing: panic_on_warn set ... [ 46.681728] [ 46.689066] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.78-g68d447c #32 [ 46.695969] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.705297] ffff8801db207cb8 ffffffff81d943a9 ffffffff83a47c40 ffff8801db207d90 [ 46.713273] ffffffff83f2f100 ffffffff832ebc36 0000000000000009 ffff8801db207d80 [ 46.721254] ffffffff8142f451 0000000041b58ab3 ffffffff8418ac30 ffffffff8142f295 [ 46.729224] Call Trace: [ 46.731787] [ 46.733823] [] dump_stack+0xc1/0x128 [ 46.739174] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 46.745464] [] panic+0x1bc/0x3a8 [ 46.750450] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 46.758645] [] ? load_image_and_restore+0xf9/0xf9 [ 46.765110] [] ? debug_object_deactivate+0x3c0/0x3c0 [ 46.771834] [] ? __warn+0x1a9/0x1e0 [ 46.777081] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 46.783367] [] __warn+0x1c4/0x1e0 [ 46.788439] [] warn_slowpath_null+0x2c/0x40 [ 46.794379] [] inet_sock_destruct+0x5f6/0x7b0 [ 46.800492] [] ? ipv4_mib_init_net+0x560/0x560 [ 46.806693] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 46.812980] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 46.819441] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 46.825904] [] __sk_destruct+0x53/0x570 [ 46.831508] [] rcu_process_callbacks+0x898/0x1300 [ 46.837970] [] ? rcu_process_callbacks+0x977/0x1300 [ 46.844605] [] ? __sk_dst_check+0x240/0x240 [ 46.850548] [] __do_softirq+0x206/0x951 [ 46.856143] [] irq_exit+0x165/0x190 [ 46.861390] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 46.867850] [] apic_timer_interrupt+0xa0/0xb0 [ 46.873972] [ 46.876006] [] ? native_safe_halt+0x6/0x10 [ 46.881874] [] default_idle+0x55/0x360 [ 46.887391] [] arch_cpu_idle+0xa/0x10 [ 46.892810] [] default_idle_call+0x36/0x60 [ 46.898663] [] cpu_startup_entry+0x2b0/0x380 [ 46.904701] [] ? cpu_in_idle+0x20/0x20 [ 46.910209] [] rest_init+0x184/0x190 [ 46.915545] [] start_kernel+0x688/0x6bd [ 46.921150] [] ? thread_stack_cache_init+0xb/0xb [ 46.927525] [] ? early_idt_handler_array+0x120/0x120 [ 46.934249] [] x86_64_start_reservations+0x2a/0x2c [ 46.940799] [] x86_64_start_kernel+0x140/0x163 [ 46.947489] Dumping ftrace buffer: [ 46.951042] (ftrace buffer empty) [ 46.954735] Kernel Offset: disabled [ 46.958341] Rebooting in 86400 seconds..