!14329 svcrdma: Address an integer overflow

	if (xdr_stream_decode_u32(&rctxt->rc_stream, &segcount))

		return false;

	/* A bogus segcount causes this buffer overflow check to fail. */

	/* Before trusting the segcount value enough to use it in

	 * a computation, perform a simple range check. This is an

	 * arbitrary but sensible limit (ie, not architectural).

	 */

	if (unlikely(segcount > RPCSVC_MAXPAGES))

		return false;

	p = xdr_inline_decode(&rctxt->rc_stream,

			      segcount * rpcrdma_segment_maxsz * sizeof(*p));

	return p != NULL;