[....] Starting enhanced syslogd: rsyslogd[ 13.648315] audit: type=1400 audit(1516394118.666:4): 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 '10.128.0.19' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 24.795755] ------------[ cut here ]------------ [ 24.800587] WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 24.809087] Kernel panic - not syncing: panic_on_warn set ... [ 24.809087] [ 24.816433] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.77-g9c3804b #17 [ 24.823333] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.832664] ffff8801db207cb8 ffffffff81d941c9 ffffffff83a47bc0 ffff8801db207d90 [ 24.840658] ffffffff83f2f000 ffffffff832ebc36 0000000000000009 ffff8801db207d80 [ 24.848630] ffffffff8142f3c1 0000000041b58ab3 ffffffff8418ab70 ffffffff8142f205 [ 24.856617] Call Trace: [ 24.859171] [ 24.861214] [] dump_stack+0xc1/0x128 [ 24.866564] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 24.872858] [] panic+0x1bc/0x3a8 [ 24.877862] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 24.886065] [] ? load_image_and_restore+0xf9/0xf9 [ 24.892537] [] ? debug_object_deactivate+0x3c0/0x3c0 [ 24.899267] [] ? __warn+0x1a9/0x1e0 [ 24.904515] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 24.910820] [] __warn+0x1c4/0x1e0 [ 24.915893] [] warn_slowpath_null+0x2c/0x40 [ 24.921845] [] inet_sock_destruct+0x5f6/0x7b0 [ 24.927964] [] ? ipv4_mib_init_net+0x560/0x560 [ 24.934182] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 24.940480] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 24.946944] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 24.953410] [] __sk_destruct+0x53/0x570 [ 24.959009] [] rcu_process_callbacks+0x898/0x1300 [ 24.965473] [] ? rcu_process_callbacks+0x977/0x1300 [ 24.972111] [] ? __sk_dst_check+0x240/0x240 [ 24.978053] [] __do_softirq+0x206/0x951 [ 24.983660] [] irq_exit+0x165/0x190 [ 24.988918] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 24.995392] [] apic_timer_interrupt+0xa0/0xb0 [ 25.001518] [ 25.003568] [] ? native_safe_halt+0x6/0x10 [ 25.009529] [] default_idle+0x55/0x360 [ 25.015044] [] arch_cpu_idle+0xa/0x10 [ 25.020481] [] default_idle_call+0x36/0x60 [ 25.026339] [] cpu_startup_entry+0x2b0/0x380 [ 25.032377] [] ? cpu_in_idle+0x20/0x20 [ 25.037888] [] rest_init+0x184/0x190 [ 25.043230] [] start_kernel+0x688/0x6bd [ 25.048826] [] ? thread_stack_cache_init+0xb/0xb [ 25.055210] [] ? early_idt_handler_array+0x120/0x120 [ 25.061935] [] x86_64_start_reservations+0x2a/0x2c [ 25.068486] [] x86_64_start_kernel+0x140/0x163 [ 25.075232] Dumping ftrace buffer: [ 25.078808] (ftrace buffer empty) [ 25.082489] Kernel Offset: disabled [ 25.086100] Rebooting in 86400 seconds..