[    4.920194] ip (435) used greatest stack depth: 12232 bytes left
[   12.914077] mpls_gso: MPLS GSO support
[   17.518036] ip (2217) used greatest stack depth: 12112 bytes left
[  859.379222] blackhole_netdev_xmit(): Dropping skb.
[  859.379297] blackhole_netdev_xmit(): Dropping skb.
[  859.379339] blackhole_netdev_xmit(): Dropping skb.
[  859.379381] blackhole_netdev_xmit(): Dropping skb.