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=-3.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 B8F61C433E0 for ; Mon, 15 Jun 2020 18:23:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 77C5B2068E for ; Mon, 15 Jun 2020 18:23:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="U+NpbKGI" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731302AbgFOSX0 (ORCPT ); Mon, 15 Jun 2020 14:23:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45954 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729124AbgFOSXZ (ORCPT ); Mon, 15 Jun 2020 14:23:25 -0400 Received: from mail-pj1-x1043.google.com (mail-pj1-x1043.google.com [IPv6:2607:f8b0:4864:20::1043]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9EA7FC061A0E for ; Mon, 15 Jun 2020 11:23:25 -0700 (PDT) Received: by mail-pj1-x1043.google.com with SMTP id i12so186891pju.3 for ; Mon, 15 Jun 2020 11:23:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=IvShgxoC6bEvinDvmURRTORSW1iT83qg7H2qgSQS19E=; b=U+NpbKGIkE9uBSFYj785QYFB+7ya2GdLJf26a5eZptaE+Q9l3S4vQkrMwGK7idV1Q/ FaLWXHRWuMIlQR1nmVSYMSzeaWFof6bo246BhYUINV13Iwgnpu/4WR/Gn4BWy3eofGKv AkLGdGsLoSUZbPWfwHx9/xA2V3pCZV1Z7gByw= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=IvShgxoC6bEvinDvmURRTORSW1iT83qg7H2qgSQS19E=; b=ZfSDxUaL+fw9Qfp6C4P7ySH5eNzjblCkzifo/Y/Bvg+LAaj0B2QTyG8T21hSCiS0ya 8f4nQDX2EziKv1zVc/0/VetGu3TEdHwjyG8/Xv6j1Q8zNgwm/TqtKyUCgErRIhvDEDlL c2r71m1a2GHrxRKoB89JRn3TY6VaYJ+z5HJjLX6JC9S0vFJscSEhySCaiIZuKMlaNA28 a1OyfcezAPrdcWurtHhYeMzbpV3J1XwBUK2TZWVpPc99jv8vA+RzjfjzmVZFnnhC+6Nj wHMiArROagPSHajinIdkWiX+otUhZlMnT+pusZvAyD0/xXvJsTF85au7sr2pih3xzmAx tEzg== X-Gm-Message-State: AOAM533PfrJIfp6REsSW3Mnf1D6EwqlODBO7sO4WiDPPsFxJotWh6jp0 mi6EC7rBbgS4Hgm2NSaxii1+Hw== X-Google-Smtp-Source: ABdhPJz0RZjZviKdUtNJ9eldCEtBXBpRgBgFrvR3r26zSJFIETSsILbIXvrl1mnG2zXN6hNYIQGOpg== X-Received: by 2002:a17:90a:1da6:: with SMTP id v35mr546338pjv.177.1592245405235; Mon, 15 Jun 2020 11:23:25 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id b3sm14373082pft.127.2020.06.15.11.23.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Jun 2020 11:23:24 -0700 (PDT) Date: Mon, 15 Jun 2020 11:23:23 -0700 From: Kees Cook To: Denis Efremov Cc: Julia Lawall , cocci@systeme.lip6.fr, linux-kernel@vger.kernel.org Subject: Re: [PATCH] coccinelle: misc: add array_size_dup script to detect missed overlow checks Message-ID: <202006151123.3C2CB7782@keescook> References: <20200615102045.4558-1-efremov@linux.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200615102045.4558-1-efremov@linux.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jun 15, 2020 at 01:20:45PM +0300, Denis Efremov wrote: > Detect an opencoded expression that is used before or after > array_size()/array3_size()/struct_size() to compute the same size. > > Cc: Kees Cook > Signed-off-by: Denis Efremov Oh, very cool! How much does this find currently? -- Kees Cook