--- glibc-2.2.5/grp/initgroups.c.orig	2003-11-13 13:03:29.620138976 -0500
+++ glibc-2.2.5/grp/initgroups.c	2003-11-13 13:05:03.693837600 -0500
@@ -23,6 +23,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <sys/param.h>
 #include <sys/types.h>
 #include <nsswitch.h>
 
@@ -207,6 +208,9 @@
     return -1;
 
   result = internal_getgrouplist (user, group, &size, &newgroups, -1);
+
+  memcpy (groups, newgroups, MIN (*ngroups, result) * sizeof (gid_t));
+
   if (result > *ngroups)
     {
       *ngroups = result;
@@ -214,8 +218,6 @@
     }
   else
     *ngroups = result;
-      
-  memcpy (groups, newgroups, *ngroups * sizeof (gid_t));
 
   free (newgroups);
   return result;