[    2.742934] ip (274) used greatest stack depth: 12320 bytes left
[  841.776525] blackhole_netdev_xmit(): Dropping skb.
[  841.776604] blackhole_netdev_xmit(): Dropping skb.
[  841.776647] blackhole_netdev_xmit(): Dropping skb.
[  841.776683] blackhole_netdev_xmit(): Dropping skb.
[ 1039.197140] blackhole_netdev_xmit(): Dropping skb.
[ 1039.197211] blackhole_netdev_xmit(): Dropping skb.
[ 1039.197244] blackhole_netdev_xmit(): Dropping skb.
[ 1039.197279] blackhole_netdev_xmit(): Dropping skb.
[ 1255.441134] blackhole_netdev_xmit(): Dropping skb.
[ 1255.441194] blackhole_netdev_xmit(): Dropping skb.
[ 1255.441230] blackhole_netdev_xmit(): Dropping skb.
[ 1255.441272] blackhole_netdev_xmit(): Dropping skb.