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 40D75C77B7F for ; Tue, 16 May 2023 20:18:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229635AbjEPUSn (ORCPT ); Tue, 16 May 2023 16:18:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39070 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229493AbjEPUSm (ORCPT ); Tue, 16 May 2023 16:18:42 -0400 Received: from mail-pl1-x62d.google.com (mail-pl1-x62d.google.com [IPv6:2607:f8b0:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 456F897 for ; Tue, 16 May 2023 13:18:41 -0700 (PDT) Received: by mail-pl1-x62d.google.com with SMTP id d9443c01a7336-1ae4c5e12edso600725ad.3 for ; Tue, 16 May 2023 13:18:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1684268321; x=1686860321; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=UB7KvHTOxdYfuutEcEFffzDOEyewDG4/NgY1Y/mO/ec=; b=XrLcPWx5b85VDO/HHZMuFNnlnUMFjEXRW0HwKQZICuO3bA5WerPDkglr/BQN5QvtNL kml5bpuuCw1FkYr36nh1HvrAbs32v8ps1Nxeii7M3fMLWvoQwNxlKwOOYj0Z7WUiejjJ UKWVsHICNCX5carltaQmlG+V4G9z+EZdMm+YA= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684268321; x=1686860321; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=UB7KvHTOxdYfuutEcEFffzDOEyewDG4/NgY1Y/mO/ec=; b=OaZqfxWFiL5RbDmnX5fiCz+Rc0wI+1kd5si7LYR1XIO/djTQuWnX0CeF2KyQDCTyF7 BI9/udawvaCpjcXYT3FS6mGVqUltaoMULzm+K6Qx95eai1JxsiQVdjEQyORCY5ZJdAsa 6kxtkyN3V7BSrvz1pp8OLLLA9Y7kO9ZDnM8DZ5Ez4iS/db+fYSzrB77DkRmYIwI+twnI 6zz85Upp2S8rEwG/8gm1s3PEsLOJYNmNAq2eOWNzIMk9V7swV+SZ/5ZR41fqFvXQRyeE COvJTi5ZC0lhdyCrETALL+LGdNAoMeoUxU+mVAXy5849rk8MuGdOrSFnm8jZ8c+kgZq3 n0GA== X-Gm-Message-State: AC+VfDyZrx57bqB7elOBWUeKvECTRD70G2wnOpB+5g04qNqa0UwGmvSz MfhoZMkAgvjh+PxhR/W26k5VVA== X-Google-Smtp-Source: ACHHUZ7Hgj6TTvcI0iIqmt1f84LzDIuAzkvPnhjlnmX8NdGMsa7uAUyLiVJBpwoTf6Fj3DCOClH6og== X-Received: by 2002:a17:902:bd06:b0:1ad:fc06:d7c0 with SMTP id p6-20020a170902bd0600b001adfc06d7c0mr13376083pls.1.1684268320847; Tue, 16 May 2023 13:18:40 -0700 (PDT) Received: from www.outflux.net (198-0-35-241-static.hfc.comcastbusiness.net. [198.0.35.241]) by smtp.gmail.com with ESMTPSA id u11-20020a17090adb4b00b0024dee5cbe29sm96260pjx.27.2023.05.16.13.18.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 May 2023 13:18:39 -0700 (PDT) Date: Tue, 16 May 2023 13:18:39 -0700 From: Kees Cook To: "Gustavo A. R. Silva" Cc: Stanimir Varbanov , Vikash Garodia , Andy Gross , Bjorn Andersson , Konrad Dybcio , Mauro Carvalho Chehab , linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org Subject: Re: [PATCH][next] media: venus: Replace one-element arrays with flexible-array members Message-ID: <202305161318.4AF9203EB@keescook> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org On Tue, May 16, 2023 at 02:17:32PM -0600, Gustavo A. R. Silva wrote: > One-element arrays are deprecated, and we are replacing them with flexible > array members instead. So, replace one-element arrays with flexible-array > members in multiple structures, and refactor the rest of the code, > accordingly. > > This helps with the ongoing efforts to tighten the FORTIFY_SOURCE > routines on memcpy() and help us make progress towards globally > enabling -fstrict-flex-arrays=3 [1]. > > This results in no differences in binary output. > > Link: https://github.com/KSPP/linux/issues/79 > Link: https://github.com/KSPP/linux/issues/291 > Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [1] > Signed-off-by: Gustavo A. R. Silva Oh fun, a subtraction variant! :) Reviewed-by: Kees Cook -- Kees Cook