[    1.981612] ip (243) used greatest stack depth: 12376 bytes left
[    2.553647] ip (277) used greatest stack depth: 12360 bytes left
[    2.597913] ip (281) used greatest stack depth: 12352 bytes left
[    2.738890] ip (291) used greatest stack depth: 12344 bytes left
[   20.332015] ip (2216) used greatest stack depth: 12072 bytes left
[  662.759693] blackhole_netdev_xmit(): Dropping skb.
[  662.759776] blackhole_netdev_xmit(): Dropping skb.
[  662.759816] blackhole_netdev_xmit(): Dropping skb.
[  662.759860] blackhole_netdev_xmit(): Dropping skb.
[  896.647055] blackhole_netdev_xmit(): Dropping skb.
[  896.647116] blackhole_netdev_xmit(): Dropping skb.
[  896.647155] blackhole_netdev_xmit(): Dropping skb.
[  896.647186] blackhole_netdev_xmit(): Dropping skb.
[ 1043.491437] blackhole_netdev_xmit(): Dropping skb.
[ 1043.491505] blackhole_netdev_xmit(): Dropping skb.
[ 1043.491537] blackhole_netdev_xmit(): Dropping skb.
[ 1043.491570] blackhole_netdev_xmit(): Dropping skb.
[ 1110.695678] blackhole_netdev_xmit(): Dropping skb.
[ 1110.695731] blackhole_netdev_xmit(): Dropping skb.
[ 1110.695762] blackhole_netdev_xmit(): Dropping skb.
[ 1110.695790] blackhole_netdev_xmit(): Dropping skb.
[ 1133.809881] blackhole_netdev_xmit(): Dropping skb.
[ 1133.809941] blackhole_netdev_xmit(): Dropping skb.
[ 1133.809973] blackhole_netdev_xmit(): Dropping skb.
[ 1133.810003] blackhole_netdev_xmit(): Dropping skb.