[    2.150697] ip (275) used greatest stack depth: 12320 bytes left
[    7.120134] ip (748) used greatest stack depth: 12304 bytes left
[  680.556825] blackhole_netdev_xmit(): Dropping skb.
[  680.556892] blackhole_netdev_xmit(): Dropping skb.
[  680.556933] blackhole_netdev_xmit(): Dropping skb.
[  680.556964] blackhole_netdev_xmit(): Dropping skb.
[  881.615016] blackhole_netdev_xmit(): Dropping skb.
[  881.615077] blackhole_netdev_xmit(): Dropping skb.
[  881.615111] blackhole_netdev_xmit(): Dropping skb.
[  881.615152] blackhole_netdev_xmit(): Dropping skb.
[  888.421548] blackhole_netdev_xmit(): Dropping skb.
[  888.421605] blackhole_netdev_xmit(): Dropping skb.
[  888.421637] blackhole_netdev_xmit(): Dropping skb.
[  888.421665] blackhole_netdev_xmit(): Dropping skb.
[  940.885008] ip (9931) used greatest stack depth: 12272 bytes left
[ 1063.738374] blackhole_netdev_xmit(): Dropping skb.
[ 1063.738433] blackhole_netdev_xmit(): Dropping skb.
[ 1063.738466] blackhole_netdev_xmit(): Dropping skb.
[ 1063.738511] blackhole_netdev_xmit(): Dropping skb.
[ 1166.023328] blackhole_netdev_xmit(): Dropping skb.
[ 1166.023408] blackhole_netdev_xmit(): Dropping skb.
[ 1166.023461] blackhole_netdev_xmit(): Dropping skb.
[ 1166.023515] blackhole_netdev_xmit(): Dropping skb.
[ 1202.864675] blackhole_netdev_xmit(): Dropping skb.
[ 1202.864747] blackhole_netdev_xmit(): Dropping skb.
[ 1202.864799] blackhole_netdev_xmit(): Dropping skb.
[ 1202.864862] blackhole_netdev_xmit(): Dropping skb.
[ 1236.632554] blackhole_netdev_xmit(): Dropping skb.
[ 1236.632630] blackhole_netdev_xmit(): Dropping skb.
[ 1236.632691] blackhole_netdev_xmit(): Dropping skb.
[ 1236.632762] blackhole_netdev_xmit(): Dropping skb.