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=-5.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 517B8C4361B for ; Wed, 16 Dec 2020 16:55:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 08F7B225A9 for ; Wed, 16 Dec 2020 16:55:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726894AbgLPQzy (ORCPT ); Wed, 16 Dec 2020 11:55:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34702 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726758AbgLPQzx (ORCPT ); Wed, 16 Dec 2020 11:55:53 -0500 Received: from mail-wm1-x32f.google.com (mail-wm1-x32f.google.com [IPv6:2a00:1450:4864:20::32f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5E9B2C06179C for ; Wed, 16 Dec 2020 08:55:13 -0800 (PST) Received: by mail-wm1-x32f.google.com with SMTP id x22so3016258wmc.5 for ; Wed, 16 Dec 2020 08:55:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=android.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=nYWHrbVbxSSL2gimdMuStJvoiPGVcobkaLSqY1apiew=; b=GwZllGkI6HrzePUJDJoMJ5E1CVxjLK6R2rRucQJtAPMWHPuWAtFjooNIk/FDZ3R0P/ qe+ZHKPCGQP/FZ1zHBP3kusq3Cv23IqmZ3l4jD97AGoQye9QwrGSycW7GdzeaKp2YUQD lHCRsjpDZvWWmn10SROnQOF6eu/kdzKmCJCc0BsFNffLELNlBvFLRfKKtxucyr47EwC2 eXGyB5NgoiotvBmuAsHRl4bjl/XSXyCYU+mdnmyNFvhmQDjmSgShonDXUg4vEVSii8ST I4Hm3UNTWZMHZ6pkQ5MojdLKYW++ywIcmQP5tPy3JoR9hBQs6fc+FeInjsSIZMuwC5ve AEyw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=nYWHrbVbxSSL2gimdMuStJvoiPGVcobkaLSqY1apiew=; b=M2DOW9wYiiGbiCocYSoTYRpNn8bfm6hfHD+S6MFRZLnU1yHRp4b7fVdBditbnerzZM 7jPo0fxzzdbfF0TYvHpEBhn3xnt9HYCXmm7/R4amDVEvcOR45VmBZy2N8m6YXCB+BWCH ESr9uhAgUQoGkSkYm/NK4ThwYwNTsapNpMa7qVrqQuKncEQmIjJhdqxCRjiNkMoxFuOp JYT0q44hybzZf57bdp0okGFI92AT39LNb2T9fZL2pTHpLp6abwBdD+cLjSnro4UQe3gD vgQ0Vwq7Oub9Gakwf2DyMcB0y5R+Sf+aAatjEIixXoT5lngFHvlW8YDvpwnXyF+egfRm L/Wg== X-Gm-Message-State: AOAM530ZHbNI2RSCbilHnqWI3VNz2vhh0bXgPWoMQ3NWpItOGx1j26RR oYyUQ1s1fNIpfIDg5kyqUkfQmw== X-Google-Smtp-Source: ABdhPJzjFllBtwtnU06LpZi8JepRVnRWoVkcD3APzeffiW53enUJeEPKnt6/1RNgwqAmgGUAOYTUZA== X-Received: by 2002:a7b:ce14:: with SMTP id m20mr4252720wmc.149.1608137712145; Wed, 16 Dec 2020 08:55:12 -0800 (PST) Received: from google.com ([2a00:79e0:d:210:7220:84ff:fe09:7d5c]) by smtp.gmail.com with ESMTPSA id j9sm4605998wrc.63.2020.12.16.08.55.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Dec 2020 08:55:11 -0800 (PST) Date: Wed, 16 Dec 2020 16:55:10 +0000 From: Alessio Balsini To: "wu-yan@tcl.com" Cc: balsini@android.com, akailash@google.com, amir73il@gmail.com, axboe@kernel.dk, duostefano93@gmail.com, dvander@google.com, fuse-devel@lists.sourceforge.net, gscrivan@redhat.com, jannh@google.com, kernel-team@android.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, maco@android.com, miklos@szeredi.hu, palmer@dabbelt.com, paullawrence@google.com, trapexit@spawn.link, zezeozue@google.com Subject: Re: [PATCH V10 2/5] fuse: Passthrough initialization and release Message-ID: References: <20201026125016.1905945-3-balsini@android.com> <3bf58b6f-c7eb-7baa-384d-ae0830d8bceb@tcl.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3bf58b6f-c7eb-7baa-384d-ae0830d8bceb@tcl.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Dec 16, 2020 at 09:32:51PM +0800, wu-yan@tcl.com wrote: > Hi Alessio, > > It may cause file reference counter leak in fuse_passthrough_open. If the > passthrough_filp > > not implement read_iter/write_iter or passthrough struct allocated failed, > the reference counter get in fget(pro->fd) not released and cause leak. > > Cheers, > > yanwu > Hi yanwu, Nice catch, this bug was introduced in v10 and will be fixed in the next patch set. Cheers, Alessio