[    1.769012] ip (242) used greatest stack depth: 12352 bytes left
[    1.824733] ip (248) used greatest stack depth: 12304 bytes left
[    5.140318] ip (443) used greatest stack depth: 12176 bytes left
[ 1040.011337] blackhole_netdev_xmit(): Dropping skb.
[ 1040.011401] blackhole_netdev_xmit(): Dropping skb.
[ 1040.011431] blackhole_netdev_xmit(): Dropping skb.
[ 1040.011464] blackhole_netdev_xmit(): Dropping skb.
[ 1121.739757] blackhole_netdev_xmit(): Dropping skb.
[ 1121.739815] blackhole_netdev_xmit(): Dropping skb.
[ 1121.739856] blackhole_netdev_xmit(): Dropping skb.
[ 1121.739892] blackhole_netdev_xmit(): Dropping skb.
[ 1211.308092] blackhole_netdev_xmit(): Dropping skb.
[ 1211.308146] blackhole_netdev_xmit(): Dropping skb.
[ 1211.308181] blackhole_netdev_xmit(): Dropping skb.
[ 1211.308219] blackhole_netdev_xmit(): Dropping skb.