[ 2.661109] ip (278) used greatest stack depth: 12368 bytes left [ 6.508304] ip (442) used greatest stack depth: 12352 bytes left [ 8.004645] ip (622) used greatest stack depth: 12336 bytes left [ 13.640134] ip (1079) used greatest stack depth: 12312 bytes left [ 874.534173] blackhole_netdev_xmit(): Dropping skb. [ 874.534235] blackhole_netdev_xmit(): Dropping skb. [ 874.534264] blackhole_netdev_xmit(): Dropping skb. [ 874.534295] blackhole_netdev_xmit(): Dropping skb. [ 896.670243] blackhole_netdev_xmit(): Dropping skb. [ 896.670294] blackhole_netdev_xmit(): Dropping skb. [ 896.670325] blackhole_netdev_xmit(): Dropping skb. [ 896.670356] blackhole_netdev_xmit(): Dropping skb. [ 1005.937024] blackhole_netdev_xmit(): Dropping skb. [ 1005.937082] blackhole_netdev_xmit(): Dropping skb. [ 1005.937113] blackhole_netdev_xmit(): Dropping skb. [ 1005.937147] blackhole_netdev_xmit(): Dropping skb.