[ 1.562282] ip (246) used greatest stack depth: 12352 bytes left [ 1.891335] ip (277) used greatest stack depth: 12320 bytes left [ 18.386666] ip (2330) used greatest stack depth: 12304 bytes left [ 696.968504] blackhole_netdev_xmit(): Dropping skb. [ 696.968579] blackhole_netdev_xmit(): Dropping skb. [ 696.968620] blackhole_netdev_xmit(): Dropping skb. [ 696.968679] blackhole_netdev_xmit(): Dropping skb. [ 783.124253] blackhole_netdev_xmit(): Dropping skb. [ 783.124315] blackhole_netdev_xmit(): Dropping skb. [ 783.124354] blackhole_netdev_xmit(): Dropping skb. [ 783.124402] blackhole_netdev_xmit(): Dropping skb.