SUNRPC: remove BUG_ON from encode_rpcb_string

Replace BUG_ON() with WARN_ON_ONCE() and truncate the encoded string if
len > max.
Signed-off-by: Weston Andros Adamson <dros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

net/sunrpc/rpcb_clnt.c

@@ -884,7 +884,10 @@ static void encode_rpcb_string(struct xdr_stream *xdr, const char *string,
 	u32 len;
 
 	len = strlen(string);
-	BUG_ON(len > maxstrlen);
+	WARN_ON_ONCE(len > maxstrlen);
+	if (len > maxstrlen)
+		/* truncate and hope for the best */
+		len = maxstrlen;
 	p = xdr_reserve_space(xdr, 4 + len);
 	xdr_encode_opaque(p, string, len);
 }