xdr_encode_pages either leaves the tail iovec pointing to null or, if padding on
the page data is needed, sets it to point to a little bit of static data.  This
is a problem if we're expecting to later append some data in gss_wrap_req.
Modify xdr_encode_pages to make tail point to the end of the data in head, as
xdr_inline_pages and xdr_write_pages do.



diff -puN net/sunrpc/xdr.c~encode_pages_tail net/sunrpc/xdr.c
--- linux-2.5.72/net/sunrpc/xdr.c~encode_pages_tail	2003-06-17 15:21:36.000000000 -0400
+++ linux-2.5.72-bfields/net/sunrpc/xdr.c	2003-06-17 15:21:36.000000000 -0400
@@ -111,11 +111,14 @@ xdr_encode_pages(struct xdr_buf *xdr, st
 	xdr->page_base = base;
 	xdr->page_len = len;
 
+	xdr->tail[0].iov_base = xdr->head[0].iov_base + xdr->head[0].iov_len;
+	xdr->tail[0].iov_len = 0;
+
 	if (len & 3) {
 		struct iovec *iov = xdr->tail;
 		unsigned int pad = 4 - (len & 3);
 
-		iov->iov_base = (void *) "\0\0\0";
+		memset(iov->iov_base, 0, pad);
 		iov->iov_len  = pad;
 		len += pad;
 	}

_