[   35.730365][  T277] ip (277) used greatest stack depth: 23744 bytes left
[  981.397943][ T8869] ip (8869) used greatest stack depth: 23376 bytes left
[ 1708.264461][T13769] blackhole_netdev_xmit(): Dropping skb.
[ 1708.264899][T13769] blackhole_netdev_xmit(): Dropping skb.
[ 1708.265124][T13769] blackhole_netdev_xmit(): Dropping skb.
[ 1708.265341][T13769] blackhole_netdev_xmit(): Dropping skb.