Paul Moore [off-list ref] wrote:

Hello netdev,

I was just made aware of the skb extension work, and it looks very
appealing from a LSM perspective.  As some of you probably remember,
we (the LSM folks) have wanted a proper security blob in the skb for
quite some time, but netdev has been resistant to this idea thus far.

Is that "blob" in addition to skb->secmark, or a replacement?