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 A584EC433EF for ; Wed, 13 Apr 2022 06:58:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233235AbiDMHAT (ORCPT ); Wed, 13 Apr 2022 03:00:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47106 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231911AbiDMHAQ (ORCPT ); Wed, 13 Apr 2022 03:00:16 -0400 Received: from mail-ed1-x52b.google.com (mail-ed1-x52b.google.com [IPv6:2a00:1450:4864:20::52b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9030838BD2 for ; Tue, 12 Apr 2022 23:57:56 -0700 (PDT) Received: by mail-ed1-x52b.google.com with SMTP id v4so1196942edl.7 for ; Tue, 12 Apr 2022 23:57:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=message-id:date:mime-version:user-agent:subject:content-language:to :references:from:in-reply-to:content-transfer-encoding; bh=Sp7hvnptI/W931YQG2jYIshQ4aGCuypBebE/tzGdpNE=; b=DZYcVZPTG6D4QslsNYGDX5RqcCwCUafMJpigiGnSHDCSYV+q64FSGnHUfzJSPU5D4G jnQnCkMgolBpdMgsGJin3kk5/6VDc+qWq5/fFWXKKGWBsdlmnNNAv39e9yBZubRip+zm FpwkvHMP64vP8AceHhRoZhsU0FYAranP54kaRvkCODgfTKH/xcWem/Vsz8VBPRZQx6p9 MomQ1FxYys+vUb0r4xGI+EqR48oCje0smOtK6b61DQoJubTvo7ha61G62MeiRuO1ETD2 5rU9aubI/ZkSDGdFmU9QE5W0uE29o8cn8LeeX97Sa0NI0CLXy19vzzgyWrviBVqFFyNE mOJA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:references:from:in-reply-to :content-transfer-encoding; bh=Sp7hvnptI/W931YQG2jYIshQ4aGCuypBebE/tzGdpNE=; b=cSVKU+QlutxBtgul/zCG7ZfL3YMftAeYvyc3WmckBftx0AoEMZEVLsD4Wr3zRYBmUK UEoiCNGYU31HWJ3U54WP0l7bH/VwbJ/bjrReJRFJDYU//iuxdksOioUljKwUUOrN4AHI CsTqWItnRDWKd4hq3iGx+/EhjA8/vrerMIEic8uRQ5dy5I2wX2LI9h6R94dARWtcVotf qJGq1m9JCk0LrTcPSOTE4RoDK4AHltCE6551sziDjgPJnkjXnNUOr0r+P+m+HfJtY2X/ xrSGxZ1dRHEzfn0Cj4gzGnlZzozzo6X5njCp2YGfrcG2zawZ+X0XqnRsjY6nSVKlz/uz 96zA== X-Gm-Message-State: AOAM533eEGuuY5+RO/r1ASlWXhbg9sMH6drjzBMqq2w/N0bB8Pk8GuNB gVqa7sECgi40azxR6N8ImaP4Yw== X-Google-Smtp-Source: ABdhPJzbzMuM4BvHhngh/VtLKxfaJL42ZAWCd0mGa6jKe4PYZJ7XnE4R/OnhhLTYyv2aEzA90bOaxA== X-Received: by 2002:a05:6402:515b:b0:41d:82c2:2749 with SMTP id n27-20020a056402515b00b0041d82c22749mr11624701edd.38.1649833075220; Tue, 12 Apr 2022 23:57:55 -0700 (PDT) Received: from [192.168.0.201] (xdsl-188-155-201-27.adslplus.ch. [188.155.201.27]) by smtp.gmail.com with ESMTPSA id fq6-20020a1709069d8600b006e891c0b7e0sm3212170ejc.129.2022.04.12.23.57.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 12 Apr 2022 23:57:54 -0700 (PDT) Message-ID: <86da471e-b18f-94e2-64a9-e0f3417ade60@linaro.org> Date: Wed, 13 Apr 2022 08:57:53 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Subject: Re: [PATCH v0] nfc: nci: add flush_workqueue to prevent uaf Content-Language: en-US To: Lin Ma , davem@davemloft.net, kuba@kernel.org, pabeni@redhat.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, mudongliangabcd@gmail.com References: <20220412160430.11581-1-linma@zju.edu.cn> From: Krzysztof Kozlowski In-Reply-To: <20220412160430.11581-1-linma@zju.edu.cn> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/04/2022 18:04, Lin Ma wrote: > Our detector found a concurrent use-after-free bug when detaching an > NCI device. The main reason for this bug is the unexpected scheduling > between the used delayed mechanism (timer and workqueue). > > The race can be demonstrated below: > Thanks! Reviewed-by: Krzysztof Kozlowski Best regards, Krzysztof