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 0DCE6C6FA82 for ; Mon, 26 Sep 2022 18:25:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230202AbiIZSZn (ORCPT ); Mon, 26 Sep 2022 14:25:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44484 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229823AbiIZSZS (ORCPT ); Mon, 26 Sep 2022 14:25:18 -0400 Received: from mail-pj1-x102b.google.com (mail-pj1-x102b.google.com [IPv6:2607:f8b0:4864:20::102b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 219355E335 for ; Mon, 26 Sep 2022 11:23:13 -0700 (PDT) Received: by mail-pj1-x102b.google.com with SMTP id x1-20020a17090ab00100b001fda21bbc90so13301927pjq.3 for ; Mon, 26 Sep 2022 11:23:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date; bh=ZbRJ8mO2p4vx8AyTjHr+MwJ8AVi8WB920WfIqpKjyQw=; b=F7JV5x/0etVoVGG4rO8OrL84nTxFnDrGuT1q6LOVYhfZKjrDIeEub2gbhtzkVtHd4n wklDvq0dbdpz83B/AL021wZUdMCpXJ/2nhf6CBHIAVLdMJlJ2J1pNnqSE9cLMtQoaXuh enRpmU+RrZ2KQlbZvsVWaFBxccDvm0e99X088= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; 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; bh=ZbRJ8mO2p4vx8AyTjHr+MwJ8AVi8WB920WfIqpKjyQw=; b=3v2QIID1Llnt5DlDnFL0UrCDugZ4I7VpH/Hw04Nw8k1Ex9N72OXOxWzJqRjB3MKh+/ JCE4ARjtQICIuVx6ZLh0WM36jzqm/M6+q9YL5meMaoT3Ikk40Cr/ysJaEP0BqMetF3rA GOyUry+rBxKPhQ4fttmAAuTaL83pY8Hf+/DGucEHaZHkFC4crwamu02LVvO6Bjty86fl GoHqH1VmwW4JgF16YWrnBSE/9KBV+9tWMpYOrlQBgBWzpi6yc3BtzY3UpXemfzlT+zHf k0SKTUk5fqdY4hBPCnVWOr3yI3fzVwSXy4k019VQuIZiGFM46BsmH/XkXwcgG4vJmqkl 9sKQ== X-Gm-Message-State: ACrzQf2jHvxm5ufrfx4MClGh3KQmfWWz/Au1ri/s9cEL4SWk9SJhclOJ Og9pZYjzI60djCsihpvHXVmdKQ== X-Google-Smtp-Source: AMsMyM7cHLr6MN/ihVvR7ni/vtK2sXPKlCsxW2iE+njcokZhvd2+/CDvsgVcm6iCkHQY6DQjsUvnhA== X-Received: by 2002:a17:902:bb98:b0:178:8e09:5675 with SMTP id m24-20020a170902bb9800b001788e095675mr23402986pls.91.1664216592557; Mon, 26 Sep 2022 11:23:12 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id c37-20020a631c65000000b0043949b480a8sm10914556pgm.29.2022.09.26.11.23.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Sep 2022 11:23:11 -0700 (PDT) Date: Mon, 26 Sep 2022 11:23:11 -0700 From: Kees Cook To: andrey.konovalov@linux.dev Cc: Marco Elver , Andrew Morton , Andrey Konovalov , Alexander Potapenko , Dmitry Vyukov , Andrey Ryabinin , kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrey Konovalov , kernel test robot Subject: Re: [PATCH mm v3] kasan: fix array-bounds warnings in tests Message-ID: <202209261123.91B4E71B2F@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-kernel@vger.kernel.org On Mon, Sep 26, 2022 at 08:08:47PM +0200, andrey.konovalov@linux.dev wrote: > From: Andrey Konovalov > > GCC's -Warray-bounds option detects out-of-bounds accesses to > statically-sized allocations in krealloc out-of-bounds tests. > > Use OPTIMIZER_HIDE_VAR to suppress the warning. > > Also change kmalloc_memmove_invalid_size to use OPTIMIZER_HIDE_VAR > instead of a volatile variable. > > Reported-by: kernel test robot > Signed-off-by: Andrey Konovalov Reviewed-by: Kees Cook -- Kees Cook