From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <glibc-bugs-return-13480-listarch-glibc-bugs=sources.redhat.com@sourceware.org>
Received: (qmail 23331 invoked by alias); 17 Oct 2011 07:45:06 -0000
Received: (qmail 23320 invoked by uid 22791); 17 Oct 2011 07:45:05 -0000
X-SWARE-Spam-Status: No, hits=-2.8 required=5.0	tests=ALL_TRUSTED,AWL,BAYES_00
X-Spam-Check-By: sourceware.org
Received: from localhost (HELO sourceware.org) (127.0.0.1)    by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Mon, 17 Oct 2011 07:44:51 +0000
From: "aj at suse dot de" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sources.redhat.com
Subject: [Bug libc/13303] strange crash in 64bit vsnprintf()
Date: Mon, 17 Oct 2011 07:45:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: glibc
X-Bugzilla-Component: libc
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: aj at suse dot de
X-Bugzilla-Status: RESOLVED
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: drepper.fsp at gmail dot com
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Changed-Fields: Status CC Resolution
Message-ID: <bug-13303-131-wm3ELcDd0z@http.sourceware.org/bugzilla/>
In-Reply-To: <bug-13303-131@http.sourceware.org/bugzilla/>
References: <bug-13303-131@http.sourceware.org/bugzilla/>
X-Bugzilla-URL: http://sourceware.org/bugzilla/
Auto-Submitted: auto-generated
Content-Type: text/plain; charset="UTF-8"
MIME-Version: 1.0
Mailing-List: contact glibc-bugs-help@sourceware.org; run by ezmlm
Precedence: bulk
List-Id: <glibc-bugs.sourceware.org>
List-Subscribe: <mailto:glibc-bugs-subscribe@sourceware.org>
List-Post: <mailto:glibc-bugs@sourceware.org>
List-Help: <mailto:glibc-bugs-help@sourceware.org>, <http://sourceware.org/lists.html#faqs>
Sender: glibc-bugs-owner@sourceware.org
X-SW-Source: 2011-10/txt/msg00121.txt.bz2

http://sourceware.org/bugzilla/show_bug.cgi?id=13303

Andreas Jaeger <aj at suse dot de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |aj at suse dot de
         Resolution|                            |INVALID

--- Comment #1 from Andreas Jaeger <aj at suse dot de> 2011-10-17 07:44:33 UTC ---
Your code is buggy, vsnprintf uses the args and you need to reset it.

    va_list args;
    va_start( args, params );

    char buffer[0x4000];
    unsigned int required = vsnprintf( buffer, sizeof(buffer), params, args );
Add va_end (args);va_start(args,params); here

    char *bigbuffer = (char*)malloc( required + 1 );
    vsnprintf( bigbuffer, required + 1, params, args );

    va_end( args );

-- 
Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.