[PATCH 2nd revision] Add SELinux context support to AUDIT target

[Mr Dash Four]

> Normally there would be an else here to do something like
> audit_log_format(ab, " osid=%u", skb->secmark);
> so that its recorded numerically if the context could not be looked up.
>   
I disagree! That approach was dropped long ago when the secctx was first 
introduced to prevent kernel information leaking into userspace (Eric 
would know more about this as he designed that aspect of it a couple of 
months ago). So the secctx is either present (and retrievable!) or not 
present from the (xt_)audit point of view. For more information see 
net/netfilter/nf_conntrack_standalone.c in the current nf-next tree.

In other words, no else is necessary.