GNU bug report logs - #18410
Use SAFE_ALLOCA etc. to avoid unbounded stack allocation.

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Package: emacs;

Reported by: Paul Eggert <eggert <at> cs.ucla.edu>

Date: Fri, 5 Sep 2014 06:10:02 UTC

Severity: wishlist

Tags: patch

Done: Paul Eggert <eggert <at> cs.ucla.edu>

Bug is archived. No further changes may be made.

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Message #61 received at 18410 <at> debbugs.gnu.org (full text, mbox):

From: "Demetrios Obenour" <demetriobenour <at> gmail.com>
To: "'Daniel Colascione'" <dancol <at> dancol.org>,
 "'Paul Eggert'" <eggert <at> cs.ucla.edu>,
 "'Stefan Monnier'" <monnier <at> iro.umontreal.ca>
Cc: 18410 <at> debbugs.gnu.org
Subject: RE: bug#18410: Use SAFE_ALLOCA etc. to avoid unbounded stack
 allocation.
Date: Sun, 7 Sep 2014 23:20:47 -0400

That would work also, and is probably the best approach.

-----Original Message-----
From: Daniel Colascione [mailto:dancol <at> dancol.org] 
Sent: Sunday, September 7, 2014 11:20 PM
To: Demetrios Obenour; 'Paul Eggert'; 'Stefan Monnier'
Cc: 18410 <at> debbugs.gnu.org
Subject: Re: bug#18410: Use SAFE_ALLOCA etc. to avoid unbounded stack allocation.

On 09/07/2014 08:17 PM, Demetrios Obenour wrote:
> This is crucial. Otherwise, a security vulnerability could result.
> 
> MAX_ALLOCA should not be larger than the page size for the target architecture.

You could just touch every page inside a large alloca.
This bug report was last modified 10 years and 258 days ago.

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