From owner-svn-src-stable-10@FreeBSD.ORG  Sun Aug  3 01:51:49 2014
Return-Path: <owner-svn-src-stable-10@FreeBSD.ORG>
Delivered-To: svn-src-stable-10@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
 (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id 22226856;
 Sun,  3 Aug 2014 01:51:49 +0000 (UTC)
Received: from svn.freebsd.org (svn.freebsd.org
 [IPv6:2001:1900:2254:2068::e6a:0])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 0EF1F28C1;
 Sun,  3 Aug 2014 01:51:49 +0000 (UTC)
Received: from svn.freebsd.org ([127.0.1.70])
 by svn.freebsd.org (8.14.9/8.14.9) with ESMTP id s731pmaO012268;
 Sun, 3 Aug 2014 01:51:48 GMT (envelope-from marcel@svn.freebsd.org)
Received: (from marcel@localhost)
 by svn.freebsd.org (8.14.9/8.14.9/Submit) id s731pmvO012267;
 Sun, 3 Aug 2014 01:51:48 GMT (envelope-from marcel@svn.freebsd.org)
Message-Id: <201408030151.s731pmvO012267@svn.freebsd.org>
From: Marcel Moolenaar <marcel@FreeBSD.org>
Date: Sun, 3 Aug 2014 01:51:48 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org
Subject: svn commit: r269453 - stable/10/lib/libc/gen
X-SVN-Group: stable-10
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
X-BeenThere: svn-src-stable-10@freebsd.org
X-Mailman-Version: 2.1.18
Precedence: list
List-Id: SVN commit messages for only the 10-stable src tree
 <svn-src-stable-10.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/svn-src-stable-10>, 
 <mailto:svn-src-stable-10-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-stable-10/>
List-Post: <mailto:svn-src-stable-10@freebsd.org>
List-Help: <mailto:svn-src-stable-10-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/svn-src-stable-10>, 
 <mailto:svn-src-stable-10-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 03 Aug 2014 01:51:49 -0000

Author: marcel
Date: Sun Aug  3 01:51:48 2014
New Revision: 269453
URL: http://svnweb.freebsd.org/changeset/base/269453

Log:
  MFC 264161: Handle the fact that the getlogin_basic() function can return
  a 0 status with a NULL pointer for the login name (result).
  
  Obtained from:	Juniper Networks, Inc.

Modified:
  stable/10/lib/libc/gen/getlogin.c
Directory Properties:
  stable/10/   (props changed)

Modified: stable/10/lib/libc/gen/getlogin.c
==============================================================================
--- stable/10/lib/libc/gen/getlogin.c	Sun Aug  3 00:35:10 2014	(r269452)
+++ stable/10/lib/libc/gen/getlogin.c	Sun Aug  3 01:51:48 2014	(r269453)
@@ -87,11 +87,16 @@ getlogin_r(char *logname, int namelen)
 	char	*result;
 	int	len;
 	int	status;
-	
+
+	if (namelen < 1)
+		return (ERANGE);
+	logname[0] = '\0';
+
 	THREAD_LOCK();
 	result = getlogin_basic(&status);
-	if (status == 0) {
-		if ((len = strlen(result) + 1) > namelen)
+	if (status == 0 && result != NULL) {
+		len = strlen(result) + 1;
+		if (len > namelen)
 			status = ERANGE;
 		else
 			strncpy(logname, result, len);