[    2.529808] ip (272) used greatest stack depth: 12344 bytes left
[  852.319498] blackhole_netdev_xmit(): Dropping skb.
[  852.319569] blackhole_netdev_xmit(): Dropping skb.
[  852.319605] blackhole_netdev_xmit(): Dropping skb.
[  852.319641] blackhole_netdev_xmit(): Dropping skb.
[  893.651664] blackhole_netdev_xmit(): Dropping skb.
[  893.651727] blackhole_netdev_xmit(): Dropping skb.
[  893.651758] blackhole_netdev_xmit(): Dropping skb.
[  893.651789] blackhole_netdev_xmit(): Dropping skb.
[  909.395613] blackhole_netdev_xmit(): Dropping skb.
[  909.395685] blackhole_netdev_xmit(): Dropping skb.
[  909.395731] blackhole_netdev_xmit(): Dropping skb.
[  909.395771] blackhole_netdev_xmit(): Dropping skb.
[ 1047.227568] blackhole_netdev_xmit(): Dropping skb.
[ 1047.227647] blackhole_netdev_xmit(): Dropping skb.
[ 1047.227689] blackhole_netdev_xmit(): Dropping skb.
[ 1047.227739] blackhole_netdev_xmit(): Dropping skb.