out of tree lsm's

[Peter Moody]

On Mon, Mar 20, 2017 at 12:30 PM, Paul Moore <paul at paul-moore.com> wrote:
> On Mon, Mar 20, 2017 at 2:54 PM, Peter Moody <peter.moody at gmail.com> wrote:
>> with the success of stackable lsm's, it occurs to me that
>> site-specific, out-of-tree modules could be extremely worthwhile.
>
> Keep in mind we don't have a general purpose solution ... yet.  Casey
> continues to work on it, and I'm sure he'll have something at some
> point, but right now you are limited to a single "big" LSMs (e.g.
> SELinux) and some combination of "small" LSMs (e.g. Yama).

right. sorry for the imprecise language; by site-specific I meant a "small" lsm.

I would love to have the ability write a small lsm that I can build as
a module and load at boot eg. via initrd.

AIUI, adding even a new "small" lsm requires kconfig patches, building
a new kernel, etc. I know there are objections to dynamically loadable
lsms and I was trying to find a compromise that made them easier to
work with.

Cheers,
peter

>> I realize that it doesn't make a lot of sense to have something that I
>> can insmod/rmmod well post-boot, but being able to at least stuff an
>> lsm in an initrd that's loaded during boot could be very helpful.
>>
>> Without having any code to pick apart just now, is the idea of this
>> functionality amenable to folks?
>
> I think the usual comments about out-of-tree modules apply here;
> you're free to do what you like, but upstream is only going to offer
> limited help/support if/until the code starts its way upstream.
>
> --
> paul moore
> www.paul-moore.com
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