[    2.342114] ip (272) used greatest stack depth: 12344 bytes left
[   10.907447] ip (1039) used greatest stack depth: 12328 bytes left
[ 1164.438911] blackhole_netdev_xmit(): Dropping skb.
[ 1164.438980] blackhole_netdev_xmit(): Dropping skb.
[ 1164.439013] blackhole_netdev_xmit(): Dropping skb.
[ 1164.439048] blackhole_netdev_xmit(): Dropping skb.
[ 1194.537873] blackhole_netdev_xmit(): Dropping skb.
[ 1194.537961] blackhole_netdev_xmit(): Dropping skb.
[ 1194.538019] blackhole_netdev_xmit(): Dropping skb.
[ 1194.538081] blackhole_netdev_xmit(): Dropping skb.