linux-kernel - Re: [PATCH 1/2] module: add syscall to load module from fd

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Date:	Wed, 12 Sep 2012 12:57:37 +1000 (EST)
From:	James Morris <jmorris@...ei.org>
To:	Rusty Russell <rusty@...tcorp.com.au>
cc:	Kees Cook <keescook@...omium.org>,
	Mimi Zohar <zohar@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org,
	Serge Hallyn <serge.hallyn@...onical.com>,
	James Morris <james.l.morris@...cle.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	Eric Paris <eparis@...hat.com>, Jiri Kosina <jkosina@...e.cz>,
	linux-security-module@...r.kernel.org,
	Chris Wright <chrisw@...s-sol.org>
Subject: Re: [PATCH 1/2] module: add syscall to load module from fd

On Mon, 10 Sep 2012, Rusty Russell wrote:

> Kees Cook <keescook@...omium.org> writes:
> > On Fri, Sep 7, 2012 at 10:12 AM, Mimi Zohar <zohar@...ux.vnet.ibm.com> wrote:
> >> This method is a consistent and extensible approach to verifying the
> >> integrity of file data/metadata, including kernel modules. The only
> >> downside to this approach, I think, is that it requires changes to the
> >> userspace tool.
> >
> > I'm fine with this -- it's an expected change that I'll pursue with
> > glibc, kmod, etc. Without the userspace changes, nothing will use the
> > new syscall. :) I've already got kmod (and older module-init-tools)
> > patched to do this locally.
> 
> A syscall is the right way to do this.  But does it need to be done?
> 
> 1) Do the LSM guys really want this hook?

Yes.

Acked-by: James Morris <james.l.morris@...cle.com>



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