Bug#217092: marked as done (libc6-dev: leaks memory in regcomp (/usr/include/regex.h))
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and subject line Bug#217092: libc6-dev: leaks memory in regcomp (/usr/include/regex.h)
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From: Alexander Kjall <capitol@sigma.su.se>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: libc6-dev: leaks memory in regcomp (/usr/include/regex.h)
Bcc: Alexander Kjall <capitol@sigma.su.se>
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Package: libc6-dev
Version: 2.3.2-8
Severity: normal
A memoryleak in regcomp, a example program is included below plus some
output from valgrind.
It might be that i use it wrongly but I don't think so.
#include <sys/types.h>
#include <regex.h>
#include <iostream>
#include <string>
void cleanup(int toexit);
regex_t *reg;
bool check_input(std::string in)
{
if(reg == 0)
{
reg = new regex_t;
}
if(int err = regcomp(reg, "^[0-9]+:[A-Za-z,]+:.*$", 0))
cleanup(err);
regmatch_t ptype;
return regexec(reg, in.c_str(), 0, &ptype, 0) != 0;
}
void cleanup(int toexit)
{
if(reg != 0)
{
regfree(reg);
}
exit(toexit);
}
int main(int argc, char *argv[])
{
std::string in = "3520872:all:message";
check_input(in.c_str());
check_input(in.c_str());
cleanup(0);
}
and some of the output from valgrind
==28354== LEAK SUMMARY:
==28354== definitely lost: 348 bytes in 2 blocks.
==28354== possibly lost: 1280 bytes in 1 blocks.
==28354== still reachable: 5588 bytes in 90 blocks.
==28354== suppressed: 0 bytes in 0 blocks.
==28354== Reachable blocks (those to which a pointer was found) are not shown.
==28354== To see them, rerun with: --show-reachable=yes
==28354==
-- System Information:
Debian Release: testing/unstable
Architecture: i386
Kernel: Linux paranor 2.4.21-4-k7 #1 Sun Aug 3 02:34:06 EST 2003 i686
Locale: LANG=sv_SE, LC_CTYPE=sv_SE
Versions of packages libc6-dev depends on:
ii libc6 2.3.2-8 GNU C Library: Shared libraries an
-- no debconf information
---------------------------------------
Received: (at 217092-done) by bugs.debian.org; 28 Oct 2003 14:20:48 +0000
>From gotom@debian.or.jp Tue Oct 28 08:14:39 2003
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Date: Tue, 28 Oct 2003 23:14:37 +0900
Message-ID: <80fzhda1pu.wl@oris.opensource.jp>
From: GOTO Masanori <gotom@debian.or.jp>
To: Colin Watson <cjwatson@debian.org>, 217092-done@bugs.debian.org
Cc: Alexander Kjall <capitol@sigma.su.se>
Subject: Re: Bug#217092: libc6-dev: leaks memory in regcomp (/usr/include/regex.h)
In-Reply-To: <[🔎] 20031022180622.GA30644@riva.ucam.org>
References: <[🔎] E1ACMRx-0000Cg-00@master.debian.org>
<[🔎] 20031022180622.GA30644@riva.ucam.org>
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At Wed, 22 Oct 2003 19:06:22 +0100,
Colin Watson wrote:
>
> On Wed, Oct 22, 2003 at 07:07:06PM +0200, Alexander Kjall wrote:
> > Package: libc6-dev
> > Version: 2.3.2-8
> > Severity: normal
> >
> > A memoryleak in regcomp, a example program is included below plus some
> > output from valgrind.
> >
> > It might be that i use it wrongly but I don't think so.
>
> You're not calling regfree() between the first and second calls to
> regcomp(). Here's a patch:
Yes, right. Thanks to Colin! I've closed.
Regards,
-- gotom
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