diff -Nur gopher-3.0.3/gopherd/command.c gopher-3.0.3woody1/gopherd/command.c
--- gopher-3.0.3/gopherd/command.c	2001-01-17 17:59:51.000000000 +0100
+++ gopher-3.0.3woody1/gopherd/command.c	2005-01-07 16:58:44.000000000 +0100
@@ -146,6 +146,7 @@
 #include "Malloc.h"
 #include "String.h"
 #include <stdio.h>
+#include <limits.h>
 #include "util.h"
 
 #include "command.h"
@@ -551,7 +552,7 @@
 	       if (*inputline == '\0')  {
 		    /*** end of HTTP headers ***/
 
-		    if (postsize > 0) {
+		    if (postsize > 0 && (postsize + 1) < INT_MAX/sizeof(char)) {
 			 char *postdata;
 
 			 postdata = (char*) malloc(sizeof(char) * (postsize + 1));