From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on
	aws-us-west-2-korg-lkml-1.web.codeaurora.org
Received: from vger.kernel.org (vger.kernel.org [23.128.96.18])
	by smtp.lore.kernel.org (Postfix) with ESMTP id 764D7CD484C
	for <linux-kernel@archiver.kernel.org>; Fri, 22 Sep 2023 18:56:23 +0000 (UTC)
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S233543AbjIVS41 (ORCPT <rfc822;linux-kernel@archiver.kernel.org>);
        Fri, 22 Sep 2023 14:56:27 -0400
Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44950 "EHLO
        lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S230086AbjIVS4Z (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Fri, 22 Sep 2023 14:56:25 -0400
X-Greylist: delayed 472 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Fri, 22 Sep 2023 11:56:18 PDT
Received: from codeconstruct.com.au (pi.codeconstruct.com.au [203.29.241.158])
        by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C99BAAB;
        Fri, 22 Sep 2023 11:56:18 -0700 (PDT)
Received: from [IPv6:2a00:79e1:abc:12d:b80:57e1:5d19:4ce4] (unknown [104.133.8.100])
        by mail.codeconstruct.com.au (Postfix) with ESMTPSA id A2DC120173;
        Sat, 23 Sep 2023 02:48:13 +0800 (AWST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=codeconstruct.com.au; s=2022a; t=1695408500;
        bh=FSxf4hp6EbxHRe+fjQ74d1A0sweRTynwo9c3KieA1cU=;
        h=Subject:From:To:Cc:Date:In-Reply-To:References;
        b=YxMJ33g177H3ap8AxEHP+V5EeklnANu+CHfgwzfJFuixJZUoQCGU0fRS0VKta3uL7
         D25TEv8wO3w50EeMpDzQy4V0EpCJpiHdyfSICwx+RkUoA+EHxiEwEpGCnfTcL44n34
         PtuhmL+nxByJlHgdu34EMtlbLmWMRM9fjnxQ77Ct5sE09LN/WsvZrSx7bx+/fOu3js
         8k3lDbWBsZITbCScaI3iqr3o4NKIpmrzSbnM8hAbkTm2im0JU2EyHwKt9aES8bG1dX
         mZVvR8VVWIR/NWDEraYrOryhrn7So8w4yx7I5Ob/IdeuZNftw7lDqwIbOEBahKvjcs
         cNzBTfnhrltWw==
Message-ID: <66b317e630f6904cbddbb8affcf06b59b4c0ead8.camel@codeconstruct.com.au>
Subject: Re: [PATCH] i3c: dw: Annotate struct dw_i3c_xfer with __counted_by
From:   Jeremy Kerr <jk@codeconstruct.com.au>
To:     Kees Cook <keescook@chromium.org>,
        Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc:     Joel Stanley <joel@jms.id.au>, linux-i3c@lists.infradead.org,
        Nathan Chancellor <nathan@kernel.org>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Tom Rix <trix@redhat.com>,
        Uwe =?ISO-8859-1?Q?Kleine-K=F6nig?= 
        <u.kleine-koenig@pengutronix.de>,
        Matt Johnston <matt@codeconstruct.com.au>,
        Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
        Jack Chen <zenghuchen@google.com>,
        linux-kernel@vger.kernel.org, llvm@lists.linux.dev,
        linux-hardening@vger.kernel.org
Date:   Fri, 22 Sep 2023 11:48:11 -0700
In-Reply-To: <20230922175011.work.800-kees@kernel.org>
References: <20230922175011.work.800-kees@kernel.org>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
User-Agent: Evolution 3.46.4-2 
MIME-Version: 1.0
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Hi Kees,

> Prepare for the coming implementation by GCC and Clang of the
> __counted_by attribute. Flexible array members annotated with
> __counted_by can have their accesses bounds-checked at run-time
> checking via CONFIG_UBSAN_BOUNDS (for array indexing) and
> CONFIG_FORTIFY_SOURCE (for strcpy/memcpy- family functions).

Nice!

Reviewed-by: Jeremy Kerr <jk@codeconstruct.com.au>

Cheers,


Jeremy