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Date: Fri, 18 Sep 1998 22:07:33 +0200 (CEST)
From: Joakim Henriksson <murduth@ludd.luth.se>
Reply-To: murduth@ludd.luth.se
To: FreeBSD-gnats-submit@FreeBSD.ORG
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Subject: bin/7980: New ld buggy!
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>Number:         7980
>Category:       bin
>Synopsis:       ld has some serious memory bugs.
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:
>Keywords:
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Sep 18 13:10:00 PDT 1998
>Last-Modified:
>Originator:     Joakim Henriksson
>Organization:
University of Luleå
>Release:        FreeBSD 3.0-CURRENT i386
>Environment:

uname -a
FreeBSD rmstar.campus.luth.se 3.0-CURRENT FreeBSD 3.0-CURRENT #2: Fri Sep 18 16:31:39 CEST 1998     murduth@rmstar.campus.luth.se:/usr/src/sys/compile/RMSTAR  i386

Current as of yesterday, ELF.

>Description:

Many arrays are assumed to be zero which breaks linking on lots of
different things.

>How-To-Repeat:

ln -s AJ /etc/malloc.conf
cat > breakld.c
#include <stdio.h>
#include <stlib.h>

void main(void){
  char *ptr;
  ptr = (char *) malloc(1024);
  gets(ptr);
}
^D
cc -c breakld.c
ld -o breakld breakld.o -lc

>Fix:
	
bzero() all allocated memory or at least don't asume that allocated memory is
zero'd, and add \000 where applicable.
>Audit-Trail:
>Unformatted:

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