[    1.936100] ip (242) used greatest stack depth: 12304 bytes left
[ 1027.333006] blackhole_netdev_xmit(): Dropping skb.
[ 1027.333086] blackhole_netdev_xmit(): Dropping skb.
[ 1027.333121] blackhole_netdev_xmit(): Dropping skb.
[ 1027.333154] blackhole_netdev_xmit(): Dropping skb.