Index: samba-4.1.6+dfsg/source3/librpc/crypto/gse_krb5.c
===================================================================
--- samba-4.1.6+dfsg.orig/source3/librpc/crypto/gse_krb5.c	2014-04-29 16:05:42.045043324 -0500
+++ samba-4.1.6+dfsg/source3/librpc/crypto/gse_krb5.c	2014-04-29 16:05:42.041043324 -0500
@@ -414,6 +414,9 @@ static krb5_error_code fill_mem_keytab_f
 	if (ret) {
 		DEBUG(1, (__location__ ": krb5_kt_start_seq_get failed (%s)\n",
 			  error_message(ret)));
+		// if krb5_kt_start_seq_get fails, kt_cursor does not hold any resources,
+		// but might no be "zeroed", (probably containing an invalid fd, see heimdal's keytab_file.c)
+		ZERO_STRUCT(kt_cursor);
 		goto out;
 	}