From: Daniel Jacobowitz <drow@false.org>
To: linuxppc-dev@lists.linuxppc.org
Subject: Re: dl-load.c (ld.so) bug??
Date: Mon, 21 Jun 1999 23:09:21 -0400 [thread overview]
Message-ID: <19990621230921.A20471@drow.res.cmu.edu> (raw)
In-Reply-To: <Pine.LNX.3.96L.990621222014.5237C-100000@unix47.andrew.cmu.edu>; from Hollis R Blanchard on Mon, Jun 21, 1999 at 10:48:12PM -0400
On Mon, Jun 21, 1999 at 10:48:12PM -0400, Hollis R Blanchard wrote:
>
> > No. Electric Fence is designed to catch programming errors, such as
> > attempting to access memory which was not 'malloc'ed. I have traced this
> > down extensively a couple of months ago, and found that it does indeed
> > appear to overrun what it malloced.
>
> I have two even simpler test cases for you:
>
> int main(void){
> char *ptr=NULL;
> free(ptr);
> }
Well, that one would probably segfault anyway (or at least, is not
guaranteed not to).
> int main(void){
> char *ptr = (char *)malloc(100);
> }
That one's a problem, though :)
> If this were the case, wouldn't you expect ridiculous levels of instability?
Depends entirely on what it overwrote.
Dan
/--------------------------------\ /--------------------------------\
| Daniel Jacobowitz |__| SCS Class of 2002 |
| Debian GNU/Linux Developer __ Carnegie Mellon University |
| dan@debian.org | | dmj+@andrew.cmu.edu |
\--------------------------------/ \--------------------------------/
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next prev parent reply other threads:[~1999-06-22 3:09 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-06-21 22:52 dl-load.c (ld.so) bug?? Troy Benjegerdes
1999-06-22 0:04 ` Hollis R Blanchard
1999-06-22 1:57 ` Troy Benjegerdes
1999-06-22 2:48 ` Hollis R Blanchard
1999-06-22 3:09 ` Daniel Jacobowitz [this message]
1999-06-22 4:36 ` Peter Chang
1999-06-22 13:52 ` Hollis R Blanchard
[not found] <Pine.LNX.3.96L.990622003119.5237E-100000@unix47.andrew.cmu.edu>
1999-06-22 4:39 ` Peter Chang
[not found] <199906231258.HAA25989@www.cedarnet.org>
1999-06-23 13:17 ` Geert Uytterhoeven
1999-06-23 14:19 ` Hollis R Blanchard
1999-06-23 14:32 ` Kevin Puetz
[not found] <Pine.LNX.4.04.9906211749280.27642-100000@narn.local.drgw.n et>
1999-06-23 14:37 ` Franz Sirl
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