Re: [PATCH 1/1] LSM/SELinux: {get,set}context hooks to access LSM security context information.

[Casey Schaufler <casey@schaufler-ca.com>]

--- Stephen Smalley <sds@tycho.nsa.gov> wrote:

> ...
> IIRC, originally audit directly called inode_getsecurity() to get the
> string label, and there was a (since removed) LSM hook to get the name
> suffix that it needed to pass in as input.  That was then replaced by
> use of interfaces to get the secid at audit collection time and convert
> that into a context only upon audit record generation to avoid the
> overhead associated with collecting a context always.
> 
> Whereas I think NFS just wants the context always, and it doesn't serve
> any purpose to first get a secid and then later turn it into a context.

It turns out that I agree that hooks to get the secctx of things
would be good to have, in fact I much prefer them to the secid
interfaces. I would personally prefer to see audit use them instead
of the secid interfaces, but I acknowlege the performance implications
that would have on SELinux.


Casey Schaufler
casey@schaufler-ca.com

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