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Date: Tue, 28 Nov 2017 14:32:43 -0500
From: Theodore Ts'o <tytso@....edu>
To: Geo Kozey <geokozey@...lfence.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
Djalal Harouni <tixxdz@...il.com>,
Kees Cook <keescook@...omium.org>,
James Morris <james.l.morris@...cle.com>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
LSM List <linux-security-module@...r.kernel.org>,
"kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>,
Jonathan Corbet <corbet@....net>
Subject: Re: Re: [PATCH v5 next 5/5] net: modules: use
request_module_cap() to load 'netdev-%s' modules
On Tue, Nov 28, 2017 at 01:16:59PM +0100, Geo Kozey wrote:
>
> Userspace can be configured in a way which is compatible with those
> changes being on the same as it can be configured to work with
> selinux. That means on distro level or sysadmin level it's a
> valuable tool. It's better than nothing and it's better than using
> some out-of-tree patches instead. Switching one sysctl would make
> their life easier.
If *selinux* can opt-in to something more stringent, such that when
you upgrade to a new version of selinux which enables something which
breaks all modules unless you set up the rules corretly, I don't see a
problem with it. It might force distributions not to go to the latest
version of SELinux because users get cranky when their systems get
broken, but for people like me, who *still* don't use SELinux because
every few years, i try to enable on my development laptop running
Debian, watch ***far*** too much stuff break. and then turn it off
again. So tieing it to SELinux (as far as I am concerned) reduces it to
a previously unsolved problem. :-)
But that's different from opting it on by default for non-SELinux
users. To which I can only say, "Please, No."
- Ted
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