linux-kernel - Re: [PATCH] e1000e: write protect ICHx NVM to prevent malicious write/erase

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Message-ID: <Pine.LNX.4.64.0810021500470.1887@twin.jikos.cz>
Date:	Thu, 2 Oct 2008 15:02:11 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Jesse Brandeburg <jesse.brandeburg@...el.com>
cc:	torvalds@...ux-foundation.org, jeff@...zik.org,
	davem@...emloft.net, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, arjan@...ux.intel.com,
	Bruce Allan <bruce.w.allan@...el.com>, arjan@...ux.intel.com
Subject: Re: [PATCH] e1000e: write protect ICHx NVM to prevent malicious
 write/erase

On Wed, 1 Oct 2008, Jesse Brandeburg wrote:

> From: Bruce Allan <bruce.w.allan@...el.com>
> 
> Set the hardware to ignore all write/erase cycles to the GbE region in
> the ICHx NVM.  This feature can be disabled by the WriteProtectNVM module
> parameter (enabled by default) only after a hardware reset, but
> the machine must be power cycled before trying to enable writes.
> 
> Signed-off-by: Bruce Allan <bruce.w.allan@...el.com>
> Signed-off-by: Jesse Brandeburg <jesse.brandeburg@...el.com>
> CC: arjan@...ux.intel.com

Does this impose any user-visible behavior change? (such as not being able 
to set up wake-on-lan, change MAC address, whatever).

-- 
Jiri Kosina
SUSE Labs

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