--- Linux-PAM-0.99.7.1/modules/pam_namespace/pam_namespace.c.unknown-user	2007-04-13 17:12:40.000000000 +0200
+++ Linux-PAM-0.99.7.1/modules/pam_namespace/pam_namespace.c	2007-04-13 18:11:57.000000000 +0200
@@ -302,11 +302,14 @@
                 *tptr = '\0';
 
             pwd = pam_modutil_getpwnam(idata->pamh, ustr);
-            *uidptr = pwd->pw_uid;
-            if (i < count - 1) {
-                ustr = tptr + 1;
+            if (pwd == NULL) {
+        	pam_syslog(idata->pamh, LOG_ERR, "Unknown user %s in configuration", ustr);
+        	poly.num_uids--;	
+            } else {
+                *uidptr = pwd->pw_uid;
                 uidptr++;
             }
+            ustr = tptr + 1;
         }
     }