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SubjectRe: [PATCH v12 0/9] LSM: Multiple concurrent LSMs
On Tue, Jan 8, 2013 at 9:14 AM, Casey Schaufler <> wrote:
> On 1/8/2013 1:12 AM, James Morris wrote:
>> Yama is special-cased and can stay that way.
> Yama is *not* a special case, it is an example. It is the kind
> of new thing that provides security that is not access control.
> It was special cased at the request of distros because there was
> no general mechanism for including it along with the primary
> LSM.

I think he meant "there is a CONFIG to special-case Yama", but yes,
Yama is a good example. Now that finit_module has landed, I intend to
send another micro-LSM to provide logic for blocking modules when the
root devices is read-only.

It would be another example of an LSM that needs to be stacked with others.


Kees Cook
Chrome OS Security

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