[    3.343418] ip (276) used greatest stack depth: 12352 bytes left
[  956.647186] ip (30968) used greatest stack depth: 12336 bytes left
[  963.557135] blackhole_netdev_xmit(): Dropping skb.
[  963.557193] blackhole_netdev_xmit(): Dropping skb.
[  963.557229] blackhole_netdev_xmit(): Dropping skb.
[  963.557271] blackhole_netdev_xmit(): Dropping skb.
[ 1193.322864] blackhole_netdev_xmit(): Dropping skb.
[ 1193.322925] blackhole_netdev_xmit(): Dropping skb.
[ 1193.322956] blackhole_netdev_xmit(): Dropping skb.
[ 1193.322990] blackhole_netdev_xmit(): Dropping skb.
[ 1233.767580] blackhole_netdev_xmit(): Dropping skb.
[ 1233.767637] blackhole_netdev_xmit(): Dropping skb.
[ 1233.767671] blackhole_netdev_xmit(): Dropping skb.
[ 1233.767708] blackhole_netdev_xmit(): Dropping skb.