[    2.331129] ip (273) used greatest stack depth: 12320 bytes left
[ 1164.815777] blackhole_netdev_xmit(): Dropping skb.
[ 1164.815846] blackhole_netdev_xmit(): Dropping skb.
[ 1164.815878] blackhole_netdev_xmit(): Dropping skb.
[ 1164.815911] blackhole_netdev_xmit(): Dropping skb.