[ 2.360966] ip (277) used greatest stack depth: 12368 bytes left [ 2.401771] ip (281) used greatest stack depth: 12352 bytes left [ 6.977202] ip (649) used greatest stack depth: 12312 bytes left [ 872.792907] blackhole_netdev_xmit(): Dropping skb. [ 872.792997] blackhole_netdev_xmit(): Dropping skb. [ 872.793046] blackhole_netdev_xmit(): Dropping skb. [ 872.793099] blackhole_netdev_xmit(): Dropping skb. [ 1101.163756] blackhole_netdev_xmit(): Dropping skb. [ 1101.163823] blackhole_netdev_xmit(): Dropping skb. [ 1101.163854] blackhole_netdev_xmit(): Dropping skb. [ 1101.163890] blackhole_netdev_xmit(): Dropping skb.