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Message-ID: <20070605211616.GE23291@devserv.devel.redhat.com>
Date: Tue, 5 Jun 2007 17:16:16 -0400
From: Alan Cox <alan@...hat.com>
To: James Morris <jmorris@...ei.org>
Cc: Eric Paris <eparis@...hat.com>, linux-kernel@...r.kernel.org,
selinux@...ho.nsa.gov, Alan Cox <alan@...hat.com>,
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
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
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