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=-11.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 4EFD3C4320E for ; Wed, 28 Jul 2021 01:03:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3039F60F02 for ; Wed, 28 Jul 2021 01:03:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234518AbhG1BDg (ORCPT ); Tue, 27 Jul 2021 21:03:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53190 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234422AbhG1BDf (ORCPT ); Tue, 27 Jul 2021 21:03:35 -0400 Received: from mail-qt1-x82d.google.com (mail-qt1-x82d.google.com [IPv6:2607:f8b0:4864:20::82d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 80B97C0613CF for ; Tue, 27 Jul 2021 18:03:34 -0700 (PDT) Received: by mail-qt1-x82d.google.com with SMTP id b1so257352qtx.0 for ; Tue, 27 Jul 2021 18:03:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=vdUDs/JAz/CXI5/S5KTpXy0emBLLybdTuURIGh2fE/o=; b=XF54ifzgjhWxaw80XZ46ZCjPoI9naybZrTFgnNQntgtfEuVlN9B934RFqjAYp3shBc 3JvUg1+sJId7TOCrBm+22Yf73e1glulx7/2YCepPJV29fw4iEfWZ8D/dVYD0F6yVatyC 0xE97ZJ1UozgDPg7D5UzdXXdhO+3xL2uDAMp4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=vdUDs/JAz/CXI5/S5KTpXy0emBLLybdTuURIGh2fE/o=; b=JZc9PV+0mA1kesq0S+OtvCX+VlULX+56KUngH9nuo/R4Lsbw05f3Fi7pal0Fo8kLgk kgI5FRKSI9OiRA1Mn6eWgf5xOHIwIn/JPFrqwtCOxMuRn5GvJPwbAcY6UZxWdP4JULRm rSBoGGlBHPfVlnnxw99fLG2etepcfnZ+1gfjN0/qlEYNE5ZEJJJu5GMunD0jcliLK0O7 iFlgUOKwWUOimBvboDqn47yW7Wr6ZVTeRErUce8MjDoSIzJLjEE2R0eqlI82eFPmfmXM 3arG3QWIdKQPJGQFryH8bEErMfN0yNUoyJrgGscYIZvkROmu5g4RUpSWYjVUebct39eR qvHA== X-Gm-Message-State: AOAM532rObPn85dmQeTRSBTRZpkzRDvK0bvv9PI1qQyZWTBuDrL3oRlY LJmbZD9QLhJQjxwlOCoxQyC4WR4UabBY0ecPLW9OQQ== X-Google-Smtp-Source: ABdhPJxjmlE5yVh8YlGpJ0U/rLjeeeLuwtccal5EeveFlAkx6Qo+3rxtJO7aKcAii92XQv8UT6eEzvGpQiQfkHuEt+A= X-Received: by 2002:ac8:7515:: with SMTP id u21mr3011194qtq.80.1627434213425; Tue, 27 Jul 2021 18:03:33 -0700 (PDT) MIME-Version: 1.0 References: <20210727205855.411487-1-keescook@chromium.org> <20210727205855.411487-7-keescook@chromium.org> In-Reply-To: <20210727205855.411487-7-keescook@chromium.org> From: Michael Chan Date: Tue, 27 Jul 2021 18:03:22 -0700 Message-ID: Subject: Re: [PATCH 06/64] bnxt_en: Use struct_group_attr() for memcpy() region To: Kees Cook Cc: linux-hardening@vger.kernel.org, "Gustavo A. R. Silva" , Keith Packard , Greg Kroah-Hartman , Andrew Morton , open list , linux-wireless@vger.kernel.org, Netdev , dri-devel@lists.freedesktop.org, linux-staging@lists.linux.dev, linux-block@vger.kernel.org, linux-kbuild@vger.kernel.org, clang-built-linux@googlegroups.com Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="0000000000003605c905c8248eca" Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org --0000000000003605c905c8248eca Content-Type: text/plain; charset="UTF-8" On Tue, Jul 27, 2021 at 2:01 PM Kees Cook wrote: > > In preparation for FORTIFY_SOURCE performing compile-time and run-time > field bounds checking for memcpy(), memmove(), and memset(), avoid > intentionally writing across neighboring fields. > > Use struct_group() around members queue_id, min_bw, max_bw, tsa, pri_lvl, > and bw_weight so they can be referenced together. This will allow memcpy() > and sizeof() to more easily reason about sizes, improve readability, > and avoid future warnings about writing beyond the end of queue_id. > > "pahole" shows no size nor member offset changes to struct bnxt_cos2bw_cfg. > "objdump -d" shows no meaningful object code changes (i.e. only source > line number induced differences and optimizations). > > Signed-off-by: Kees Cook Thanks. 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