[....] Starting enhanced syslogd: rsyslogd[ 14.872983] audit: type=1400 audit(1517340804.131:4): avc: denied { syslog } for pid=3919 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 '10.128.0.38' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 26.740827] ------------[ cut here ]------------ [ 26.745632] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 26.754113] Kernel panic - not syncing: panic_on_warn set ... [ 26.754113] [ 26.761464] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.78-g7be1985 #33 [ 26.768367] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.777693] ffff8801db307cb8 ffffffff81d94409 ffffffff83a47c40 ffff8801db307d90 [ 26.785684] ffffffff83f2f100 ffffffff832ebc36 0000000000000009 ffff8801db307d80 [ 26.793657] ffffffff8142f4a1 0000000041b58ab3 ffffffff8418ac30 ffffffff8142f2e5 [ 26.801625] Call Trace: [ 26.804177] [ 26.806217] [] dump_stack+0xc1/0x128 [ 26.811569] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 26.817858] [] panic+0x1bc/0x3a8 [ 26.822845] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 26.831045] [] ? load_image_and_restore+0xf9/0xf9 [ 26.837516] [] ? __warn+0x1a9/0x1e0 [ 26.842764] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 26.849059] [] __warn+0x1c4/0x1e0 [ 26.854134] [] warn_slowpath_null+0x2c/0x40 [ 26.860081] [] inet_sock_destruct+0x5f6/0x7b0 [ 26.866201] [] ? trace_hardirqs_on+0xd/0x10 [ 26.872144] [] ? ipv4_mib_init_net+0x560/0x560 [ 26.878358] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 26.884646] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 26.891108] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 26.897571] [] __sk_destruct+0x53/0x570 [ 26.903166] [] rcu_process_callbacks+0x898/0x1300 [ 26.909627] [] ? rcu_process_callbacks+0x977/0x1300 [ 26.916266] [] ? __sk_dst_check+0x240/0x240 [ 26.922211] [] __do_softirq+0x206/0x951 [ 26.927804] [] irq_exit+0x165/0x190 [ 26.933049] [] smp_apic_timer_interrupt+0x7b/0xa0 [ 26.939509] [] apic_timer_interrupt+0xa0/0xb0 [ 26.945619] [ 26.947656] [] ? native_safe_halt+0x6/0x10 [ 26.953527] [] ? trace_hardirqs_on+0xd/0x10 [ 26.959468] [] default_idle+0x55/0x360 [ 26.964976] [] arch_cpu_idle+0xa/0x10 [ 26.970396] [] default_idle_call+0x36/0x60 [ 26.976252] [] cpu_startup_entry+0x2b0/0x380 [ 26.982286] [] ? cpu_in_idle+0x20/0x20 [ 26.987795] [] ? clockevents_register_device+0x123/0x200 [ 26.994868] [] start_secondary+0x303/0x3e0 [ 27.000731] [] ? set_cpu_sibling_map+0x11f0/0x11f0 [ 27.007870] Dumping ftrace buffer: [ 27.011420] (ftrace buffer empty) [ 27.015101] Kernel Offset: disabled [ 27.018704] Rebooting in 86400 seconds..