--- src/lib/krb4/g_cnffile.c
+++ src/lib/krb4/g_cnffile.c	2006/10/30 11:12:26
@@ -68,7 +68,7 @@
 					&full_name);
 	    if (retval == 0 && full_name && full_name[0]) {
 		retname[0] = '\0';
-		strncat(retname, full_name[0], sizeof(retname));
+		strncat(retname, full_name[0], sizeof(retname)-strlen(retname)-1);
 		for (cpp = full_name; *cpp; cpp++) 
 		    krb5_xfree(*cpp);
 		krb5_xfree(full_name);
@@ -76,7 +76,7 @@
 	    }
 	}
 	retname[0] = '\0';
-	strncat(retname, default_srvtabname, sizeof(retname));
+	strncat(retname, default_srvtabname, sizeof(retname)-strlen(retname)-1);
 	return retname;
 }