[    2.526559] ip (277) used greatest stack depth: 12352 bytes left
[    9.904432] ip (784) used greatest stack depth: 12200 bytes left
[ 1138.194216] blackhole_netdev_xmit(): Dropping skb.
[ 1138.194302] blackhole_netdev_xmit(): Dropping skb.
[ 1138.194347] blackhole_netdev_xmit(): Dropping skb.
[ 1138.194400] blackhole_netdev_xmit(): Dropping skb.
[ 1250.744442] blackhole_netdev_xmit(): Dropping skb.
[ 1250.744505] blackhole_netdev_xmit(): Dropping skb.
[ 1250.744542] blackhole_netdev_xmit(): Dropping skb.
[ 1250.744576] blackhole_netdev_xmit(): Dropping skb.