$NetBSD: patch-aa,v 1.2 2007/08/20 23:18:07 joerg Exp $

--- xmessage.c.orig	2007-04-24 21:55:34.000000000 +0200
+++ xmessage.c
@@ -34,6 +34,7 @@ from the X Consortium.
 #include <X11/Intrinsic.h>
 #include <X11/StringDefs.h>
 #include <X11/Shell.h>
+#include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 
@@ -170,6 +171,11 @@ detab (char **messagep, int *lengthp)
       n++;
 
   /* length increases by at most seven extra spaces for each tab */
+  if (n >= (INT_MAX - *lengthp - 1) / 7) {
+    fprintf (stderr, "%s: integer overflow, terminating\n", ProgramName);
+    exit (1);
+  }
+
   psize = *lengthp + n*7 + 1;
   p = XtMalloc (psize);