[ 3.145601] ip (293) used greatest stack depth: 12272 bytes left [ 21.291753] mpls_gso: MPLS GSO support [ 966.617763] blackhole_netdev_xmit(): Dropping skb. [ 966.617883] blackhole_netdev_xmit(): Dropping skb. [ 966.617922] blackhole_netdev_xmit(): Dropping skb. [ 966.617962] blackhole_netdev_xmit(): Dropping skb. [ 1111.573285] blackhole_netdev_xmit(): Dropping skb. [ 1111.573361] blackhole_netdev_xmit(): Dropping skb. [ 1111.573411] blackhole_netdev_xmit(): Dropping skb. [ 1111.573460] blackhole_netdev_xmit(): Dropping skb. [ 1191.734667] blackhole_netdev_xmit(): Dropping skb. [ 1191.734723] blackhole_netdev_xmit(): Dropping skb. [ 1191.734754] blackhole_netdev_xmit(): Dropping skb. [ 1191.734786] blackhole_netdev_xmit(): Dropping skb.