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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F421CC71136 for ; Fri, 18 Aug 2023 01:25:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1356997AbjHRBZC (ORCPT ); Thu, 17 Aug 2023 21:25:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39172 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1357057AbjHRBYs (ORCPT ); Thu, 17 Aug 2023 21:24:48 -0400 Received: from omta38.uswest2.a.cloudfilter.net (omta38.uswest2.a.cloudfilter.net [35.89.44.37]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A62FB4200 for ; Thu, 17 Aug 2023 18:24:25 -0700 (PDT) Received: from eig-obgw-6010a.ext.cloudfilter.net ([10.0.30.248]) by cmsmtp with ESMTP id Wkeuq2YhQQFHRWoDSqteT5; Fri, 18 Aug 2023 01:23:54 +0000 Received: from gator4166.hostgator.com ([108.167.133.22]) by cmsmtp with ESMTPS id WoDRqsKf1JJfoWoDRqeMxb; Fri, 18 Aug 2023 01:23:53 +0000 X-Authority-Analysis: v=2.4 cv=V4lubMri c=1 sm=1 tr=0 ts=64dec829 a=1YbLdUo/zbTtOZ3uB5T3HA==:117 a=WzbPXH4gqzPVN0x6HrNMNA==:17 a=OWjo9vPv0XrRhIrVQ50Ab3nP57M=:19 a=dLZJa+xiwSxG16/P+YVxDGlgEgI=:19 a=IkcTkHD0fZMA:10 a=UttIx32zK-AA:10 a=wYkD_t78qR0A:10 a=NEAV23lmAAAA:8 a=VwQbUJbxAAAA:8 a=pGLkceISAAAA:8 a=SRrdq9N9AAAA:8 a=cm27Pg_UAAAA:8 a=HvF037n1xESchLcPDVoA:9 a=QEXdDO2ut3YA:10 a=AjGcO6oz07-iQ99wixmX:22 a=xmb-EsYY8bH0VWELuYED:22 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=embeddedor.com; s=default; h=Content-Transfer-Encoding:Content-Type: In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date:Message-ID:Sender :Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=rV+WYRnH5TXA/Y405RDLo11+a66UWskxwRISLK/OmBI=; b=FJu+paHXo96eE8gQAEcxG7Ef8a XWwtsMMaJR30bKbG+wqSV3e0xMTA2NAt8+4Sld4LWF6jKM1wknDMnEV6YjkoHaxubC5sErJgWjEWW rxVylS8//8+rYl0ENj0XOzUyiS2mG7ME9ZaNUDrxMgNQsEmF3E4iuxHWzbpRwWzh2nbACl8LAnBXC wUjyqPrnSdes293KRNE+eF3m5s4jyJuUcfhjGBWOoNKkUYRAZVjuQcVKNbmpydLNw7eE9vYLpfRyX Vao1iyrQRhTs8bfHGyqyccbl/2mQGZyYT8COOzwxHbTb5IxERn1JwDsBJSWwa0HGA4pL1m2tkceIv ObLo8hgg==; Received: from 187-162-21-192.static.axtel.net ([187.162.21.192]:34254 helo=[192.168.15.8]) by gator4166.hostgator.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.96) (envelope-from ) id 1qWoDL-000WJd-1n; Thu, 17 Aug 2023 20:23:47 -0500 Message-ID: <488f56f6-7a46-b8f9-bfc8-5d1934d095ab@embeddedor.com> Date: Thu, 17 Aug 2023 19:24:46 -0600 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.13.0 Subject: Re: [PATCH 10/21] dmaengine: sprd: Annotate struct sprd_dma_dev with __counted_by Content-Language: en-US To: Kees Cook , Vinod Koul Cc: Orson Zhai , Baolin Wang , Chunyan Zhang , dmaengine@vger.kernel.org, Hector Martin , Sven Peter , Alyssa Rosenzweig , Ludovic Desroches , Tudor Ambarus , Lars-Peter Clausen , Zhou Wang , Jie Hai , Andy Gross , Bjorn Andersson , Konrad Dybcio , Green Wan , Patrice Chotard , Maxime Coquelin , Alexandre Torgue , Laxman Dewangan , Jon Hunter , Thierry Reding , Peter Ujfalusi , Kunihiko Hayashi , Masami Hiramatsu , Yu Kuai , Greg Kroah-Hartman , Jordy Zomer , Jernej Skrabec , Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-kernel@vger.kernel.org, asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-tegra@vger.kernel.org, llvm@lists.linux.dev, linux-hardening@vger.kernel.org References: <20230817235428.never.111-kees@kernel.org> <20230817235859.49846-10-keescook@chromium.org> From: "Gustavo A. R. Silva" In-Reply-To: <20230817235859.49846-10-keescook@chromium.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - gator4166.hostgator.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - embeddedor.com X-BWhitelist: no X-Source-IP: 187.162.21.192 X-Source-L: No X-Exim-ID: 1qWoDL-000WJd-1n X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: 187-162-21-192.static.axtel.net ([192.168.15.8]) [187.162.21.192]:34254 X-Source-Auth: gustavo@embeddedor.com X-Email-Count: 297 X-Org: HG=hgshared;ORG=hostgator; X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= X-Local-Domain: yes X-CMAE-Envelope: MS4xfH/ZahgMvZEV3xnHMaMPERUkAZhqu6eJagF0RzHjKwbZCaHkIkUxeDJC6WSYFVFZ5644dCXtbAFsYSr7u6rxf/wIYM3QBHJQOkuNQgLBxOlUi5t6e2zY w++ySjQjQCNRpdJIePrpecYkKLbVqpl7TrKdT76PHhK2LWW1Gw5EG6zX1fNA6fAuj0Dinvq24grTwQkC7epI9zJCLfXGeZONLeM2g6p50HZRhGLbL/bV+IXS Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org On 8/17/23 17:58, Kees Cook wrote: > 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). > > As found with Coccinelle[1], add __counted_by for struct sprd_dma_dev. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Vinod Koul > Cc: Orson Zhai > Cc: Baolin Wang > Cc: Chunyan Zhang > Cc: dmaengine@vger.kernel.org > Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Thanks -- Gustavo > --- > drivers/dma/sprd-dma.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c > index 168aa0bd73a0..07871dcc4593 100644 > --- a/drivers/dma/sprd-dma.c > +++ b/drivers/dma/sprd-dma.c > @@ -212,7 +212,7 @@ struct sprd_dma_dev { > struct clk *ashb_clk; > int irq; > u32 total_chns; > - struct sprd_dma_chn channels[]; > + struct sprd_dma_chn channels[] __counted_by(total_chns); > }; > > static void sprd_dma_free_desc(struct virt_dma_desc *vd);