[ 2.486475] ip (294) used greatest stack depth: 12384 bytes left [ 14.022495] mpls_gso: MPLS GSO support [ 864.512745] blackhole_netdev_xmit(): Dropping skb. [ 864.512815] blackhole_netdev_xmit(): Dropping skb. [ 864.512853] blackhole_netdev_xmit(): Dropping skb. [ 864.512884] blackhole_netdev_xmit(): Dropping skb. [ 901.764279] blackhole_netdev_xmit(): Dropping skb. [ 901.764335] blackhole_netdev_xmit(): Dropping skb. [ 901.764365] blackhole_netdev_xmit(): Dropping skb. [ 901.764398] blackhole_netdev_xmit(): Dropping skb.