From owner-freebsd-bugs@freebsd.org  Thu Aug  6 19:36:45 2015
Return-Path: <owner-freebsd-bugs@freebsd.org>
Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id BA1389B5BCB
 for <freebsd-bugs@mailman.ysv.freebsd.org>;
 Thu,  6 Aug 2015 19:36:45 +0000 (UTC)
 (envelope-from bugzilla-noreply@freebsd.org)
Received: from kenobi.freebsd.org (kenobi.freebsd.org
 [IPv6:2001:1900:2254:206a::16:76])
 (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 A70231E61
 for <freebsd-bugs@FreeBSD.org>; Thu,  6 Aug 2015 19:36:45 +0000 (UTC)
 (envelope-from bugzilla-noreply@freebsd.org)
Received: from bugs.freebsd.org ([127.0.1.118])
 by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id t76JajWO049527
 for <freebsd-bugs@FreeBSD.org>; Thu, 6 Aug 2015 19:36:45 GMT
 (envelope-from bugzilla-noreply@freebsd.org)
From: bugzilla-noreply@freebsd.org
To: freebsd-bugs@FreeBSD.org
Subject: [Bug 202142] Uninitialized variable usage in error path in
 _dns_getaddrinfo()
Date: Thu, 06 Aug 2015 19:36:45 +0000
X-Bugzilla-Reason: AssignedTo
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: Base System
X-Bugzilla-Component: misc
X-Bugzilla-Version: 11.0-CURRENT
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: Affects Some People
X-Bugzilla-Who: seanb@cosemica.com
X-Bugzilla-Status: New
X-Bugzilla-Priority: ---
X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform
 op_sys bug_status bug_severity priority component assigned_to reporter
Message-ID: <bug-202142-8@https.bugs.freebsd.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: freebsd-bugs@freebsd.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: Bug reports <freebsd-bugs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-bugs>,
 <mailto:freebsd-bugs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-bugs/>
List-Post: <mailto:freebsd-bugs@freebsd.org>
List-Help: <mailto:freebsd-bugs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-bugs>,
 <mailto:freebsd-bugs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 06 Aug 2015 19:36:45 -0000

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=202142

            Bug ID: 202142
           Summary: Uninitialized variable usage in error path in
                    _dns_getaddrinfo()
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: misc
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: seanb@cosemica.com

The calls to RES_SET_H_ERRNO() macro on error paths wind up
dereferencing an uninitialized res:

Index: net/getaddrinfo.c
===================================================================
--- net/getaddrinfo.c    (revision 286381)
+++ net/getaddrinfo.c    (working copy)
@@ -2154,6 +2154,8 @@
     memset(&sentinel, 0, sizeof(sentinel));
     cur = &sentinel;

+    res = __res_state();
+
     buf = malloc(sizeof(*buf));
     if (!buf) {
         RES_SET_H_ERRNO(res, NETDB_INTERNAL);
@@ -2200,7 +2202,6 @@
         return NS_UNAVAIL;
     }

-    res = __res_state();
     if ((res->options & RES_INIT) == 0 && res_ninit(res) == -1) {
         RES_SET_H_ERRNO(res, NETDB_INTERNAL);
         free(buf);

-- 
You are receiving this mail because:
You are the assignee for the bug.