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Message-ID: <20170522120848.GA3003@openwall.com>
Date: Mon, 22 May 2017 14:08:48 +0200
From: Solar Designer <solar@...nwall.com>
To: Djalal Harouni <tixxdz@...il.com>
Cc: linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
linux-security-module@...r.kernel.org,
kernel-hardening@...ts.openwall.com,
Andy Lutomirski <luto@...nel.org>,
Kees Cook <keescook@...omium.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Rusty Russell <rusty@...tcorp.com.au>,
"Serge E. Hallyn" <serge@...lyn.com>, Jessica Yu <jeyu@...hat.com>,
"David S. Miller" <davem@...emloft.net>,
James Morris <james.l.morris@...cle.com>,
Paul Moore <paul@...l-moore.com>,
Stephen Smalley <sds@...ho.nsa.gov>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
Ingo Molnar <mingo@...nel.org>,
Linux API <linux-api@...r.kernel.org>,
Dongsu Park <dpark@...teo.net>,
Casey Schaufler <casey@...aufler-ca.com>,
Jonathan Corbet <corbet@....net>,
Arnaldo Carvalho de Melo <acme@...hat.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
Zendyani <zendyani@...il.com>, linux-doc@...r.kernel.org,
Al Viro <viro@...iv.linux.org.uk>,
Ben Hutchings <ben.hutchings@...ethink.co.uk>
Subject: Re: [PATCH v4 next 0/3] modules: automatic module loading restrictions
Hi Djalal,
Thank you for your work on this!
On Mon, May 22, 2017 at 01:57:03PM +0200, Djalal Harouni wrote:
> *) When modules_autoload_mode is set to (2), automatic module loading is
> disabled for all. Once set, this value can not be changed.
What purpose does this securelevel-like property ("Once set, this value
can not be changed.") serve here? I think this mode 2 is needed, but
without this extra property, which is bypassable by e.g. explicitly
loaded kernel modules anyway (and that's OK).
I'm sorry if this has been discussed before.
Alexander
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