[    2.624626] ip (279) used greatest stack depth: 12360 bytes left
[    2.675529] ip (283) used greatest stack depth: 12344 bytes left
[ 1042.879944] blackhole_netdev_xmit(): Dropping skb.
[ 1042.880014] blackhole_netdev_xmit(): Dropping skb.
[ 1042.880050] blackhole_netdev_xmit(): Dropping skb.
[ 1042.880085] blackhole_netdev_xmit(): Dropping skb.
[ 1087.014137] blackhole_netdev_xmit(): Dropping skb.
[ 1087.014252] blackhole_netdev_xmit(): Dropping skb.
[ 1087.014319] blackhole_netdev_xmit(): Dropping skb.
[ 1087.014397] blackhole_netdev_xmit(): Dropping skb.