linux-kernel - Re: Using x86 segments against NULL pointer deference exploit

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Message-ID: <alpine.LRH.2.00.0911111511250.31913@twin.jikos.cz>
Date:	Wed, 11 Nov 2009 15:11:59 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Markku Savela <msa@...h.iki.fi>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Using x86 segments against NULL pointer deference exploit

On Tue, 10 Nov 2009, Markku Savela wrote:

> I'm wondering why on architectures that actually have EXECUTE
> permission memory management, the user space is mapped into kernel
> with EXECUTE enabled!!!??

x86, to give one random example?

-- 
Jiri Kosina
SUSE Labs, Novell Inc.

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