[    1.698387] ip (247) used greatest stack depth: 12376 bytes left
[    2.227441] ip (281) used greatest stack depth: 12360 bytes left
[    2.269466] ip (285) used greatest stack depth: 12344 bytes left
[   14.254190] mpls_gso: MPLS GSO support
[ 1006.617708] blackhole_netdev_xmit(): Dropping skb.
[ 1006.617782] blackhole_netdev_xmit(): Dropping skb.
[ 1006.617819] blackhole_netdev_xmit(): Dropping skb.
[ 1006.617856] blackhole_netdev_xmit(): Dropping skb.