Date: Fri, 18 Sep 1998 22:07:33 +0200 (CEST) From: Joakim Henriksson <murduth@ludd.luth.se> To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: bin/7980: New ld buggy! Message-ID: <199809182007.WAA07980@rmstar.campus.luth.se>
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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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