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 26D13C433F5 for ; Mon, 4 Apr 2022 07:50:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1377826AbiDDHwX (ORCPT ); Mon, 4 Apr 2022 03:52:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46156 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1377823AbiDDHwL (ORCPT ); Mon, 4 Apr 2022 03:52:11 -0400 Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e3e3]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8970D34641; Mon, 4 Apr 2022 00:50:14 -0700 (PDT) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: usama.anjum) with ESMTPSA id D826B1F4575C DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1649058611; bh=wRw+FS/liDk8+4/LHOdlgCTWRsMje4kGNd0ZwHY5Gnk=; h=Date:Cc:Subject:To:References:From:In-Reply-To:From; b=NHqpx3h3QOudoE+UAyxOFAjRtQ7Fele4HRnn0OBhKxSN+omOJGLlH4lcz09TieocE fc50/oAY7+J28KdLLY0ygIOrYwHxQr9HScvmTzxfC7Eaa+GF77Xa2ktfQNXZBDXOcv 3Hd+lc539CxodPHwzX+faOrzeY+CbjWWE2Ekg32okJPCU9AmpjNClgrmbZQUetVYmy S6QcqatbmZEVggOZSb0Mtp3C4Tp+RWQy9RypO9CF+6dxUTtlzc784WZH7dHu5FsuUB iZodFN8aklsktKu/UxhsqgXuijImuWa+XBB1W6gBoSYzuBDT3K5NXcapTY5jlHaLJm d3CIZRMXd+Jpw== Message-ID: Date: Mon, 4 Apr 2022 12:50:01 +0500 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.6.2 Cc: usama.anjum@collabora.com, Shuah Khan , Greg Kroah-Hartman , kernel@collabora.com, kernelci@groups.io, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/2] selftests/lkdtm: add config Content-Language: en-US To: Kees Cook References: <20220217205620.2512094-1-usama.anjum@collabora.com> <20220217205620.2512094-2-usama.anjum@collabora.com> <202203091123.33E89F5@keescook> <76529762-1a36-142d-0aa9-beb5fa2bb27b@collabora.com> From: Muhammad Usama Anjum In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Kees, Any thoughts? On 3/15/22 4:55 PM, Muhammad Usama Anjum wrote: > On 3/10/22 10:22 PM, Muhammad Usama Anjum wrote: >> On 3/10/22 12:23 AM, Kees Cook wrote: >>> On Fri, Feb 18, 2022 at 01:56:20AM +0500, Muhammad Usama Anjum wrote: >>>> Add config option which is needed for SLAB_LINEAR_OVERFLOW test. It >>>> needs KASAN enabled. >>> >>> I'd prefer this use the SLAB_DEBUG options -- KASAN is very heavy. >> I'll test it out and update in the next patch version. >> I've tested by removing KASAN and adding the following config: > CONFIG_SLAB=y > CONFIG_DEBUG_SLAB=y > > The result of SLAB_LINEAR_OVERFLOW test doesn't remain deterministic in > this config. The task never crashes and hence stack trace never appears. > When executed several times we get "Slab corruption" logs and after some > more tries whole kernel crashes. I've not used DEBUG_SLAB before and not > sure if this is the expected behavior. If we aren't sure, we can keep > KASAN turned on instead. > -- Muhammad Usama Anjum