From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <sourceware-bugzilla@sourceware.org>
Received: by sourceware.org (Postfix, from userid 48)
 id 9A9AD386F447; Fri,  8 May 2020 03:55:09 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 9A9AD386F447
From: "wangxuszcn at foxmail dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug malloc/25947] New: memory leak in muntrace
Date: Fri, 08 May 2020 03:55:09 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: glibc
X-Bugzilla-Component: malloc
X-Bugzilla-Version: 2.3.2
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: wangxuszcn at foxmail dot com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at sourceware dot org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status
 bug_severity priority component assigned_to reporter target_milestone
Message-ID: <bug-25947-131@http.sourceware.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://sourceware.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: glibc-bugs@sourceware.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Glibc-bugs mailing list <glibc-bugs.sourceware.org>
List-Unsubscribe: <http://sourceware.org/mailman/options/glibc-bugs>,
 <mailto:glibc-bugs-request@sourceware.org?subject=unsubscribe>
List-Archive: <https://sourceware.org/pipermail/glibc-bugs/>
List-Help: <mailto:glibc-bugs-request@sourceware.org?subject=help>
List-Subscribe: <http://sourceware.org/mailman/listinfo/glibc-bugs>,
 <mailto:glibc-bugs-request@sourceware.org?subject=subscribe>
X-List-Received-Date: Fri, 08 May 2020 03:55:09 -0000

https://sourceware.org/bugzilla/show_bug.cgi?id=3D25947

            Bug ID: 25947
           Summary: memory leak in muntrace
           Product: glibc
           Version: 2.3.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: malloc
          Assignee: unassigned at sourceware dot org
          Reporter: wangxuszcn at foxmail dot com
  Target Milestone: ---

Since glibc 2.32, stream buffer used by mallstream in mtrace() function, sh=
ould
be freed in muntrace(), or 512 byte will leaked every call of mtrace().


Patches can be like this:
diff --git a/malloc/mtrace.c b/malloc/mtrace.c
index 7e7719d..b3bc5b0 100644
--- a/malloc/mtrace.c
+++ b/malloc/mtrace.c
@@ -365,4 +365,5 @@ muntrace (void)

   fprintf (f, "=3D End\n");
   fclose (f);
+  free (malloc_trace_buffer);
 }

Will any one request a CVE for this issue?

--=20
You are receiving this mail because:
You are on the CC list for the bug.=