[    1.970362] ip (244) used greatest stack depth: 12368 bytes left
[    2.605672] ip (278) used greatest stack depth: 12336 bytes left
[   24.190498] ip (2341) used greatest stack depth: 12320 bytes left
[  658.373586] blackhole_netdev_xmit(): Dropping skb.
[  658.373648] blackhole_netdev_xmit(): Dropping skb.
[  658.373685] blackhole_netdev_xmit(): Dropping skb.
[  658.373720] blackhole_netdev_xmit(): Dropping skb.
[  725.590223] blackhole_netdev_xmit(): Dropping skb.
[  725.590280] blackhole_netdev_xmit(): Dropping skb.
[  725.590311] blackhole_netdev_xmit(): Dropping skb.
[  725.590343] blackhole_netdev_xmit(): Dropping skb.
[  742.939526] blackhole_netdev_xmit(): Dropping skb.
[  742.939596] blackhole_netdev_xmit(): Dropping skb.
[  742.939628] blackhole_netdev_xmit(): Dropping skb.
[  742.939659] blackhole_netdev_xmit(): Dropping skb.
[  753.743816] blackhole_netdev_xmit(): Dropping skb.
[  753.743865] blackhole_netdev_xmit(): Dropping skb.
[  753.743897] blackhole_netdev_xmit(): Dropping skb.
[  753.743930] blackhole_netdev_xmit(): Dropping skb.
[  782.201195] blackhole_netdev_xmit(): Dropping skb.
[  782.201266] blackhole_netdev_xmit(): Dropping skb.
[  782.201318] blackhole_netdev_xmit(): Dropping skb.
[  782.201369] blackhole_netdev_xmit(): Dropping skb.
[ 1078.643084] blackhole_netdev_xmit(): Dropping skb.
[ 1078.643159] blackhole_netdev_xmit(): Dropping skb.
[ 1078.643193] blackhole_netdev_xmit(): Dropping skb.
[ 1078.643225] blackhole_netdev_xmit(): Dropping skb.
[ 1079.403474] blackhole_netdev_xmit(): Dropping skb.
[ 1079.403532] blackhole_netdev_xmit(): Dropping skb.
[ 1079.403565] blackhole_netdev_xmit(): Dropping skb.
[ 1079.403599] blackhole_netdev_xmit(): Dropping skb.
[ 1169.516537] blackhole_netdev_xmit(): Dropping skb.
[ 1169.516593] blackhole_netdev_xmit(): Dropping skb.
[ 1169.516624] blackhole_netdev_xmit(): Dropping skb.
[ 1169.516656] blackhole_netdev_xmit(): Dropping skb.