--- source/nsswitch/pam_winbind.c.bak	2009-04-03 12:37:05.000000000 +0700
+++ source/nsswitch/pam_winbind.c	2009-04-03 12:37:05.000000000 +0700
@@ -2318,6 +2318,8 @@
 	const char *user;
 	wbcErr wbc_status = WBC_ERR_SUCCESS;

+	logoff.blobs = NULL;
+
 	retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
 	if (retval) {
 		goto out;