Re: [PATCH v10] LSM: Multiple concurrent LSMs

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On Wed, Dec 12, 2012 at 1:25 PM, Casey Schaufler <casey@xxxxxxxxxxxxxxxx> wrote:

> Configure None as the presented LSM and all legacy userspace
> will fail. Trouble for all.

I think the question is when and how it fails.  I'd like SELinux to
fail really early and in some clean way if it is non-present and you
don't have new userspace.  I'd rather it fail on policy load than on
some later /proc/*/attr/ issue.  I can do it myself even if you don't
want to do it as part of the stacking work.

My current thought is a required ioctl before policy load if
non-present otherwise reject policy load instead of the entirely new
policy load file.

-Eric

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