[    2.055641] ip (292) used greatest stack depth: 12272 bytes left
[   12.349364] mpls_gso: MPLS GSO support
[  640.253296] ip (4638) used greatest stack depth: 12240 bytes left
[  709.167475] blackhole_netdev_xmit(): Dropping skb.
[  709.167527] blackhole_netdev_xmit(): Dropping skb.
[  709.167578] blackhole_netdev_xmit(): Dropping skb.
[  709.167616] blackhole_netdev_xmit(): Dropping skb.