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

Previous Next

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.

Full log

View this message in rfc822 format

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Paul Eggert <eggert <at> cs.ucla.edu>
Cc: Eli Zaretskii <eliz <at> gnu.org>, 18410 <at> debbugs.gnu.org
Subject: bug#18410: Use SAFE_ALLOCA etc. to avoid unbounded stack allocation.
Date: Sun, 07 Sep 2014 22:22:23 -0400

> Usually MAX_ALLOCA-related code falls back on malloc, and does not exit
> merely because a request was larger.  callproc.c's child_setup function is

MAX_ALLOCA is chosen small so that we can allocate several/many objects
of size MAX_ALLOCA.  Whereas in this case, after this alloca we're not
expected to use up the stack much more (we're about to `exec' anyway,
right?).  So MAX_ALLOCA is much too conservative for this case.


        Stefan
This bug report was last modified 10 years and 258 days ago.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.