Re: [PATCH 00/12] One more attempt at useful kernel lockdown

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On Mon, 9 Sep 2013, Matthew Garrett wrote:

On Mon, 2013-09-09 at 12:59 -0700, David Lang wrote:

At least you should be able to unify the implementation, even if you don't unify
the user visible knob

Well sure, I could take this integer and merge another integer into it,
but now you have the same value being modified by two different
user-visible interfaces which aren't guaranteed to have the same
semantics.

It's not that you merge integers, it's that the knob that currently sets the signed module only loading but not anything else would have it's implementation changed so that instead of doing whatever it currently does, it would instead make an internal call to set the "require signed modules" bit, and that one place would implement the lockdown.

David Lang
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