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 42E95C7113B for ; Fri, 18 Aug 2023 03:38:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1357735AbjHRDiO (ORCPT ); Thu, 17 Aug 2023 23:38:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44426 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1357792AbjHRDiE (ORCPT ); Thu, 17 Aug 2023 23:38:04 -0400 Received: from omta040.useast.a.cloudfilter.net (omta040.useast.a.cloudfilter.net [44.202.169.39]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 58D3B2708; Thu, 17 Aug 2023 20:38:00 -0700 (PDT) Received: from eig-obgw-5010a.ext.cloudfilter.net ([10.0.29.199]) by cmsmtp with ESMTP id WmuKqjqwDyYOwWqJDq2IjB; Fri, 18 Aug 2023 03:37:59 +0000 Received: from gator4166.hostgator.com ([108.167.133.22]) by cmsmtp with ESMTPS id WqJCqlTvr2eFNWqJCq489j; Fri, 18 Aug 2023 03:37:59 +0000 X-Authority-Analysis: v=2.4 cv=VvAwvs6n c=1 sm=1 tr=0 ts=64dee797 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=Ikd4Dj_1AAAA:8 a=pGLkceISAAAA: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=L0n5YvsnOREjDavEqwIfonPDHlgYaxvqnu5lUobWG1I=; b=tHeYKVrHUJemYIG8wkzYXKKQeK LZOQuy5Q2Aff6Q0LjCX7wAbdA0NELdQ2ug9kERJ3nmfLByHcAGYZ0H2urNlpeuYcVRKN+RibDxB2L CpKt9CwfXsU4hSApJ1dxGON3kuCzv/Atk0Kzu6WTS8nb66oEO/YJNsWoLseZQHoWFdNAyKGwgfyuc 6HQ4lOh4wHIem2qOg1qaLoRzhbAhQ1ywyJoYdBBe/2ATUMXpz+FHrqdhMffnxRMcUiagT7FChjDLc m6ZcIUlk06BerGP4CPuLEn6BP5kURY0Ljf11xvLMVXxkmGzXUKGVvXBY20R60Fjw/SwRsoM3MQayW 2ug8swMA==; Received: from 187-162-21-192.static.axtel.net ([187.162.21.192]:48526 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 1qWp00-001BF6-0L; Thu, 17 Aug 2023 21:14:04 -0500 Message-ID: <681fd5fa-3a0d-676b-44b0-0aab66f21dd7@embeddedor.com> Date: Thu, 17 Aug 2023 20:15:02 -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 15/21] dmaengine: tegra: Annotate struct tegra_dma_desc with __counted_by Content-Language: en-US To: Kees Cook , Vinod Koul Cc: Laxman Dewangan , Jon Hunter , Thierry Reding , dmaengine@vger.kernel.org, linux-tegra@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 , Orson Zhai , Baolin Wang , Chunyan Zhang , Patrice Chotard , Maxime Coquelin , Alexandre Torgue , 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, llvm@lists.linux.dev, linux-hardening@vger.kernel.org References: <20230817235428.never.111-kees@kernel.org> <20230817235859.49846-15-keescook@chromium.org> From: "Gustavo A. R. Silva" In-Reply-To: <20230817235859.49846-15-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: 1qWp00-001BF6-0L 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]:48526 X-Source-Auth: gustavo@embeddedor.com X-Email-Count: 0 X-Org: HG=hgshared;ORG=hostgator; X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= X-Local-Domain: yes X-CMAE-Envelope: MS4xfJNG9md9klS3TOspPzHh0mLpMoyDUM4wWKM5OCx3HOh+pB0fr7eqAUk2hmZQTd8htZvH6ooUR+/ypeGb1jicbbcP8tx0r0zNYlGCgZPmaHU/OzeKuX2s BkQ9KtyohacXA7+qDWoNVYI0YYXG2fqR627/Y3a2CaH3Zu4Qk4okFca5FHdQEYskAmeitGvPU7tVmV31PseqhHFB7VHch3i0Qgz1+W3dQzezdsM1w91uRy6T h3ifmNDHi2sA/DCipr1ZKOiaVCsaKlMU0uz9zhuLmoCq+hOVfJ5y83w9AftOXwkYnvvS18woEQA2+GzK1US80C+VdjRMLcq6LNN9va4TUobZC0sEoXtujnqQ Vp938fi7tlu6DwZKyualp1B9D64Y3g7OaKc4EPxC4k5jjNCMknM= 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 tegra_dma_desc. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Vinod Koul > Cc: Laxman Dewangan > Cc: Jon Hunter > Cc: Thierry Reding > Cc: dmaengine@vger.kernel.org > Cc: linux-tegra@vger.kernel.org > Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Thanks -- Gustavo > --- > drivers/dma/tegra186-gpc-dma.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/dma/tegra186-gpc-dma.c b/drivers/dma/tegra186-gpc-dma.c > index 33b101001100..5e3d5f5d1e20 100644 > --- a/drivers/dma/tegra186-gpc-dma.c > +++ b/drivers/dma/tegra186-gpc-dma.c > @@ -221,7 +221,7 @@ struct tegra_dma_desc { > unsigned int sg_count; > struct virt_dma_desc vd; > struct tegra_dma_channel *tdc; > - struct tegra_dma_sg_req sg_req[]; > + struct tegra_dma_sg_req sg_req[] __counted_by(sg_count); > }; > > /*