linux-kernel - Re: [PATCH 3/7] security: introduce kernel_fw_from

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Message-ID: <20140718014816.GA603@kroah.com>
Date:	Thu, 17 Jul 2014 18:48:16 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Kees Cook <keescook@...omium.org>
Cc:	linux-kernel@...r.kernel.org, Ming Lei <ming.lei@...onical.com>,
	"Luis R. Rodriguez" <mcgrof@...e.com>,
	James Morris <james.l.morris@...cle.com>,
	David Howells <dhowells@...hat.com>, linux-doc@...r.kernel.org,
	linux-security-module@...r.kernel.org, linux-firmware@...nel.org,
	linux-wireless <linux-wireless@...r.kernel.org>
Subject: Re: [PATCH 3/7] security: introduce kernel_fw_from_file hook

On Mon, Jul 14, 2014 at 02:38:13PM -0700, Kees Cook wrote:
> In order to validate the contents of firmware being loaded, there must be
> a hook to evaluate any loaded firmware that wasn't built into the kernel
> itself. Without this, there is a risk that a root user could load malicious
> firmware designed to mount an attack against kernel memory (e.g. via DMA).
> 
> Signed-off-by: Kees Cook <keescook@...omium.org>
> ---
>  include/linux/security.h |   16 ++++++++++++++++
>  security/capability.c    |    6 ++++++
>  security/security.c      |    6 ++++++
>  3 files changed, 28 insertions(+)

I would like an ack from a security developer/maintainer before applying
this patch...

thanks,

greg k-h
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