[ 2.022857] ip (247) used greatest stack depth: 12376 bytes left [ 2.676093] ip (281) used greatest stack depth: 12344 bytes left [ 16.076211] mpls_gso: MPLS GSO support [ 711.984119] blackhole_netdev_xmit(): Dropping skb. [ 711.984186] blackhole_netdev_xmit(): Dropping skb. [ 711.984226] blackhole_netdev_xmit(): Dropping skb. [ 711.984263] blackhole_netdev_xmit(): Dropping skb.