[PATCH v2] lockdown,selinux: avoid bogus SELinux lockdown permission checks

Paul Moore paul at paul-moore.com
Wed Jun 9 02:40:15 UTC 2021

On Tue, Jun 8, 2021 at 7:02 AM Ondrej Mosnacek <omosnace at redhat.com> wrote:
> On Thu, Jun 3, 2021 at 7:46 PM Paul Moore <paul at paul-moore.com> wrote:


> > It sounds an awful lot like the lockdown hook is in the wrong spot.
> > It sounds like it would be a lot better to relocate the hook than
> > remove it.
> I don't see how you would solve this by moving the hook. Where do you
> want to relocate it?

Wherever it makes sense.  Based on your comments it really sounded
like the hook was in a bad spot and since your approach in a lot of
this had been to remove or disable hooks I wanted to make sure that
relocating the hook was something you had considered.  Thankfully it
sounds like you have considered moving the hook - that's good.

> The main obstacle is that the message containing
> the SA dump is sent to consumers via a simple netlink broadcast, which
> doesn't provide a facility to redact the SA secret on a per-consumer
> basis. I can't see any way to make the checks meaningful for SELinux
> without a major overhaul of the broadcast logic.

Fair enough.

paul moore

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