From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 748E3C606C1 for ; Mon, 8 Jul 2019 16:53:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 47C8920693 for ; Mon, 8 Jul 2019 16:53:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732922AbfGHQxI (ORCPT ); Mon, 8 Jul 2019 12:53:08 -0400 Received: from mga14.intel.com ([192.55.52.115]:63275 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726318AbfGHQxH (ORCPT ); Mon, 8 Jul 2019 12:53:07 -0400 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 08 Jul 2019 09:53:07 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.63,466,1557212400"; d="p7s'?scan'208";a="364292991" Received: from orsmsx106.amr.corp.intel.com ([10.22.225.133]) by fmsmga006.fm.intel.com with ESMTP; 08 Jul 2019 09:53:07 -0700 Received: from orsmsx123.amr.corp.intel.com (10.22.240.116) by ORSMSX106.amr.corp.intel.com (10.22.225.133) with Microsoft SMTP Server (TLS) id 14.3.439.0; Mon, 8 Jul 2019 09:53:06 -0700 Received: from orsmsx103.amr.corp.intel.com ([169.254.5.44]) by ORSMSX123.amr.corp.intel.com ([169.254.1.245]) with mapi id 14.03.0439.000; Mon, 8 Jul 2019 09:53:06 -0700 From: "Stotland, Inga" To: "jakub.witowski@silvair.com" , "linux-bluetooth@vger.kernel.org" CC: "Gix, Brian" Subject: Re: [RFC BlueZ 0/1] Validate element indexation Thread-Topic: [RFC BlueZ 0/1] Validate element indexation Thread-Index: AQHVNZdTQzhqil0Lq0+dZ8aBJmT0kKbBZWOA Date: Mon, 8 Jul 2019 16:53:06 +0000 Message-ID: <65651744c67ae13bd95ffac88fae42f0f6c16c61.camel@intel.com> References: <20190708141314.13950-1-jakub.witowski@silvair.com> In-Reply-To: <20190708141314.13950-1-jakub.witowski@silvair.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-originating-ip: [10.252.203.194] Content-Type: multipart/signed; micalg=sha-1; protocol="application/x-pkcs7-signature"; boundary="=-4QeeDCZ3bekc6liIvBnX" MIME-Version: 1.0 Sender: linux-bluetooth-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org --=-4QeeDCZ3bekc6liIvBnX Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Jakub, On Mon, 2019-07-08 at 16:13 +0200, Jakub Witowski wrote: > Hello, >=20 > I've prepared validation of element indexation. >=20 > First of all I've used 64-bit unsigned value to collect all given > indexes. > As You can deduce from "4.2.1.1 Composition Data Page 0", the maximum > value of elements can be 61. > It is limited by max message size which is 376. Furthermore the > element indexes should be given > with no gap between them, for example: > element index: 3, 2, 0, 1 will be ok, > element index: 3, 2, 0 should return an error because the idx 1 is > missing >=20 > Secondly I think, that the validation of element index value may be > required, cause for now > we support 255 (uint8_t). >=20 > Please let me know what do You thing of aboves. >=20 > BR, > Jakub Witowski=20 >=20 > Jakub Witowski (1): > mesh: Validate element indexation >=20 > mesh/node.c | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) >=20 I agree that the validation for the gaps is needed. Interesting point about max number of elements... I wonder if a better check woul be to we to add to construct composition data as a validation point to make sure it fits in mesh message= . 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