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[24.9.64.241]) by smtp.gmail.com with ESMTPSA id l9sm1317402ilf.65.2020.09.28.15.42.47 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 28 Sep 2020 15:42:48 -0700 (PDT) Subject: Re: [PATCH 00/11] Introduce Simple atomic and non-atomic counters To: Kees Cook Cc: corbet@lwn.net, gregkh@linuxfoundation.org, shuah@kernel.org, rafael@kernel.org, johannes@sipsolutions.net, lenb@kernel.org, james.morse@arm.com, tony.luck@intel.com, bp@alien8.de, arve@android.com, tkjos@android.com, maco@android.com, joel@joelfernandes.org, christian@brauner.io, hridya@google.com, surenb@google.com, minyard@acm.org, arnd@arndb.de, mchehab@kernel.org, rric@kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-acpi@vger.kernel.org, devel@driverdev.osuosl.org, openipmi-developer@lists.sourceforge.net, linux-edac@vger.kernel.org, Shuah Khan References: <202009260920.DC9C2743@keescook> From: Shuah Khan Message-ID: <1aeccb4f-df7e-60bf-1d70-dfcff5bb6f87@linuxfoundation.org> Date: Mon, 28 Sep 2020 16:42:46 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <202009260920.DC9C2743@keescook> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org On 9/26/20 10:22 AM, Kees Cook wrote: > On Fri, Sep 25, 2020 at 05:47:14PM -0600, Shuah Khan wrote: >> This patch series is a result of discussion at the refcount_t BOF >> the Linux Plumbers Conference. In this discussion, we identified >> a need for looking closely and investigating atomic_t usages in >> the kernel when it is used strictly as a counter without it >> controlling object lifetimes and state changes. > > BTW, I realized the KSPP issue tracker hadn't broken this task out of > the refcount_t conversion issue[1] into a separate issue, so I've created > it now: https://github.com/KSPP/linux/issues/106 > Cool. Thanks. -- Shuah 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=-10.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 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 A0D21C2D0A8 for ; Mon, 28 Sep 2020 22:42:53 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 3629123A50 for ; Mon, 28 Sep 2020 22:42:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="beQywzat" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3629123A50 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=driverdev-devel-bounces@linuxdriverproject.org Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id A217D87108; Mon, 28 Sep 2020 22:42:52 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id geXTHODowKhW; Mon, 28 Sep 2020 22:42:51 +0000 (UTC) Received: from ash.osuosl.org (ash.osuosl.org [140.211.166.34]) by hemlock.osuosl.org (Postfix) with ESMTP id EBA0E87109; Mon, 28 Sep 2020 22:42:50 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) by ash.osuosl.org (Postfix) with ESMTP id 3B2AA1BF278 for ; Mon, 28 Sep 2020 22:42:50 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id 374A585BD3 for ; Mon, 28 Sep 2020 22:42:50 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id uZtvsCrhPxHY for ; Mon, 28 Sep 2020 22:42:49 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mail-il1-f194.google.com (mail-il1-f194.google.com [209.85.166.194]) by fraxinus.osuosl.org (Postfix) with ESMTPS id B55CA85BCF for ; Mon, 28 Sep 2020 22:42:49 +0000 (UTC) Received: by mail-il1-f194.google.com with SMTP id e5so2951787ilr.8 for ; Mon, 28 Sep 2020 15:42:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=google; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=lfWeOnITWCeijLSuxzxiSIPC5xTsdC1wKnU7B3ZC5Lk=; b=beQywzattpQ6h9VxrWUUjSXbW2NzdQ7tN01P6Fxu3w0DElSH99yNXq/oeDtcSOP/9X EENXteBPokqZCQ4iUMEdnei6q+cCq5jNGrbY/ShMUDDnZsK5zrAkesLqvzbzRHGHUd2D ZDoxf29bX/+HC/gfcdQn6A5JV5Bg+hGw1IFG0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=lfWeOnITWCeijLSuxzxiSIPC5xTsdC1wKnU7B3ZC5Lk=; b=JEb0U2kBzlvpJdPcvYICob93BwEON4pr4FdKOIyR60bzEGfagLixMB77OofKi2IxWa 6v7BX6WJhDiuh31bWYmds3L6Zs+hOyNwBsSIYzNoMssupGyZRJdkLAVM7if8Spw61leI uC9rAfNeHLMxcfwQb/lkvdKz9qpJBiDrWPJZ8+2FEvCCM3Yoa2X6FH++4QQ3zCoNPpGK LFoYHH1FII7KrP9IWqR32WcnxjSytuq0l1t2RvaCj1PXWiVszv/nVan5uYOkLvl7hsWx 4z3ygmglBq5WvAfDzwoF6P0bPNHDs9yQM61o4+3I9cwt3gGWAOgtc7n/Mt0uDMFIDhCm pyzw== X-Gm-Message-State: AOAM530MGRzvm1fLhVrbZ0IAV+1jpVc10cSKzQkalTrQ0exdTQvZEDgK XK4dbWPf0iL8qC/GkJjsBp/Vhw== X-Google-Smtp-Source: ABdhPJwo+pvtsIEQwf41bcDHTqwQ2dD5eUFFFgp4elRZ673xZA4id8e/WXiXlaCwN8OjTLklnmPUJQ== X-Received: by 2002:a92:8591:: with SMTP id f139mr533509ilh.164.1601332969021; Mon, 28 Sep 2020 15:42:49 -0700 (PDT) Received: from [192.168.1.112] (c-24-9-64-241.hsd1.co.comcast.net. [24.9.64.241]) by smtp.gmail.com with ESMTPSA id l9sm1317402ilf.65.2020.09.28.15.42.47 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 28 Sep 2020 15:42:48 -0700 (PDT) Subject: Re: [PATCH 00/11] Introduce Simple atomic and non-atomic counters To: Kees Cook References: <202009260920.DC9C2743@keescook> From: Shuah Khan Message-ID: <1aeccb4f-df7e-60bf-1d70-dfcff5bb6f87@linuxfoundation.org> Date: Mon, 28 Sep 2020 16:42:46 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <202009260920.DC9C2743@keescook> Content-Language: en-US X-BeenThere: driverdev-devel@linuxdriverproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Driver Project Developer List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: rafael@kernel.org, linux-kselftest@vger.kernel.org, joel@joelfernandes.org, rric@kernel.org, shuah@kernel.org, devel@driverdev.osuosl.org, minyard@acm.org, corbet@lwn.net, surenb@google.com, linux-doc@vger.kernel.org, linux-acpi@vger.kernel.org, lenb@kernel.org, tkjos@android.com, arnd@arndb.de, bp@alien8.de, Shuah Khan , openipmi-developer@lists.sourceforge.net, mchehab@kernel.org, maco@android.com, christian@brauner.io, linux-edac@vger.kernel.org, tony.luck@intel.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, arve@android.com, james.morse@arm.com, hridya@google.com, johannes@sipsolutions.net Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: driverdev-devel-bounces@linuxdriverproject.org Sender: "devel" On 9/26/20 10:22 AM, Kees Cook wrote: > On Fri, Sep 25, 2020 at 05:47:14PM -0600, Shuah Khan wrote: >> This patch series is a result of discussion at the refcount_t BOF >> the Linux Plumbers Conference. In this discussion, we identified >> a need for looking closely and investigating atomic_t usages in >> the kernel when it is used strictly as a counter without it >> controlling object lifetimes and state changes. > > BTW, I realized the KSPP issue tracker hadn't broken this task out of > the refcount_t conversion issue[1] into a separate issue, so I've created > it now: https://github.com/KSPP/linux/issues/106 > Cool. Thanks. -- Shuah _______________________________________________ devel mailing list devel@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel