[    2.239012] ip (273) used greatest stack depth: 12320 bytes left
[ 1146.046252] blackhole_netdev_xmit(): Dropping skb.
[ 1146.046317] blackhole_netdev_xmit(): Dropping skb.
[ 1146.046349] blackhole_netdev_xmit(): Dropping skb.
[ 1146.046374] blackhole_netdev_xmit(): Dropping skb.