File sdp-Fix-requests-with-invalid-size.patch of Package bluez.30319

From c3db771dfddef948bc5346c94e5e0f519857eff6 Mon Sep 17 00:00:00 2001
From: Artem Rakhov <arakhov@chromium.org>
Date: Mon, 30 Jun 2014 12:58:46 -0700
Subject: [PATCH] sdp: Fix requests with invalid size

This patch fixes processing of SDP requests which have wrong PDU size in header.

Every SDP request consists of two parts: header and data.
Header always contains 3 values: request code (identifies it's type),
transaction ID (in order to match response with request), and data's size.

According to Bluetooth specification, when the data's size is wrong,
SDP server should return SDP_ErrorResponse with "Invalid PDU Size" parameter.
But now the server doesn't respond at all, and corresponding socket on
client's side crashes.

The patch actually reverts commit 388761cdc8f8a1293bb0b1a5bd576b5fb41616ca,
because the size of request should be checked inside handle_request() function
in order to be able to respond with SDP_ErrorResponse, instead of stopping
the connection.
---
 src/sdpd-server.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

Index: bluez-5.13/src/sdpd-server.c
===================================================================
--- bluez-5.13.orig/src/sdpd-server.c
+++ bluez-5.13/src/sdpd-server.c
@@ -176,7 +176,11 @@ static gboolean io_session_event(GIOChan
 		return TRUE;
 
 	len = recv(sk, buf, size, 0);
-	if (len != size) {
+	/* Check here only that the received message is not empty.
+	 * Incorrect length of message should be processed later
+	 * inside handle_request() in order to produce ErrorResponse.
+	 */
+	if (len <= 0) {
 		sdp_svcdb_collect_all(sk);
 		free(buf);
 		return FALSE;