linux-kernel - Re: [PATCH] Protection for exploiting null dereference using mmap

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Date:	Wed, 6 Jun 2007 11:06:31 -0700
From:	Chris Wright <chrisw@...s-sol.org>
To:	Eric Paris <eparis@...hat.com>
Cc:	Alan Cox <alan@...hat.com>, James Morris <jmorris@...ei.org>,
	linux-kernel@...r.kernel.org, selinux@...ho.nsa.gov,
	drepper@...hat.com, roland@...hat.com, arjan@...radead.org,
	mingo@...e.hu, viro@...iv.linux.org.uk, chrisw@...hat.com,
	sds@...ho.nsa.gov, sgrubb@...hat.com
Subject: Re: [PATCH] Protection for exploiting null dereference using mmap

* Eric Paris (eparis@...hat.com) wrote:
> On Tue, 2007-06-05 at 17:16 -0400, Alan Cox wrote:
> > On Tue, Jun 05, 2007 at 05:00:51PM -0400, James Morris wrote:
> > > This should be an unsigned long.
> > > 
> > > I wonder if the default should be for this value to be zero (i.e. preserve 
> > > existing behavior).  It could break binaries, albeit potentially insecure 
> > 
> > Agreed - DOSemu type apps and lrmi need to map at zero for vm86
> 
> And so it shall be!
> 
> Signed-off-by: Eric Paris <eparis@...hat.com>

With James' fix and real changelog ;-)

Acked-by: Chris Wright <chrisw@...s-sol.org>
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