[....] Starting enhanced syslogd: rsyslogd[ 11.333800] audit: type=1400 audit(1516051089.153:4): avc: denied { syslog } for pid=3176 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 '10.128.0.16' (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" syzkaller login: [ 37.916463] ip (3390) used greatest stack depth: 24608 bytes left 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 [ 38.387483] ------------[ cut here ]------------ [ 38.392308] WARNING: CPU: 1 PID: 17 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x5f6/0x7b0 [ 38.400904] Kernel panic - not syncing: panic_on_warn set ... [ 38.400904] [ 38.408687] CPU: 1 PID: 17 Comm: ksoftirqd/1 Not tainted 4.9.76-g8dec074 #13 [ 38.415849] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.425212] ffff8801d9827a40 ffffffff81d93169 ffffffff83a47180 ffff8801d9827b18 [ 38.433212] ffffffff83f2e500 ffffffff832e9cb6 0000000000000009 ffff8801d9827b08 [ 38.441184] ffffffff8142e371 0000000041b58ab3 ffffffff84189690 ffffffff8142e1b5 [ 38.449156] Call Trace: [ 38.451722] [] dump_stack+0xc1/0x128 [ 38.457056] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 38.463359] [] panic+0x1bc/0x3a8 [ 38.468352] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 38.476552] [] ? load_image_and_restore+0xf9/0xf9 [ 38.483017] [] ? debug_object_deactivate+0x3c0/0x3c0 [ 38.489743] [] ? __warn+0x1a9/0x1e0 [ 38.494992] [] ? inet_sock_destruct+0x5f6/0x7b0 [ 38.501470] [] __warn+0x1c4/0x1e0 [ 38.506544] [] warn_slowpath_null+0x2c/0x40 [ 38.512489] [] inet_sock_destruct+0x5f6/0x7b0 [ 38.518620] [] ? ipv4_mib_init_net+0x560/0x560 [ 38.524916] [] l2tp_tunnel_destruct+0x352/0x5a0 [ 38.531205] [] ? l2tp_tunnel_destruct+0x1aa/0x5a0 [ 38.537671] [] ? l2tp_tunnel_del_work+0x460/0x460 [ 38.544153] [] __sk_destruct+0x53/0x570 [ 38.549753] [] rcu_process_callbacks+0x898/0x1300 [ 38.556228] [] ? rcu_process_callbacks+0x977/0x1300 [ 38.562886] [] ? __sk_dst_check+0x240/0x240 [ 38.568837] [] __do_softirq+0x206/0x951 [ 38.574436] [] ? takeover_tasklets+0x760/0x760 [ 38.580659] [] run_ksoftirqd+0x2e/0x60 [ 38.586257] [] smpboot_thread_fn+0x5c1/0x8f0 [ 38.592287] [] ? sort_range+0x30/0x30 [ 38.597710] [] ? __kthread_parkme+0xcf/0x240 [ 38.603741] [] ? schedule+0x89/0x1b0 [ 38.609088] [] ? __kthread_parkme+0x175/0x240 [ 38.615214] [] kthread+0x26d/0x300 [ 38.620385] [] ? sort_range+0x30/0x30 [ 38.625824] [] ? kthread_park+0xa0/0xa0 [ 38.631429] [] ? kthread_park+0xa0/0xa0 [ 38.637039] [] ? kthread_park+0xa0/0xa0 [ 38.642640] [] ret_from_fork+0x46/0x60 [ 38.648641] Dumping ftrace buffer: [ 38.652192] (ftrace buffer empty) [ 38.655883] Kernel Offset: disabled [ 38.659501] Rebooting in 86400 seconds..