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=-4.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 EA444C07E9C for ; Tue, 6 Jul 2021 06:28:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CDB7F61469 for ; Tue, 6 Jul 2021 06:28:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230086AbhGFGbP (ORCPT ); Tue, 6 Jul 2021 02:31:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36072 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230036AbhGFGbP (ORCPT ); Tue, 6 Jul 2021 02:31:15 -0400 Received: from mail-pg1-x532.google.com (mail-pg1-x532.google.com [IPv6:2607:f8b0:4864:20::532]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 57156C061574; Mon, 5 Jul 2021 23:28:37 -0700 (PDT) Received: by mail-pg1-x532.google.com with SMTP id 62so12365473pgf.1; Mon, 05 Jul 2021 23:28:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=TR1u3sRWI99pfiHxerbHetS8AvWmZAq6Zxi2S+X7xBM=; b=BQSTFgo8lk6p20yznXf61GjDalo7+DJT77UfsbMMDIVKg+ZeuSARuEpiNW+FopzG0M fMHX0VUVQEKOkm1sMk4dYQgU92097mXX5LCZvJHsvqScg0+4CSLwbqeie33KmahF2Hqm mtQwpCrLhvlRBqZ1iQbtct0GVl/VR3SWOti2J4pIfNonVAGIHFNZd6/C8HmGaWhj+Qhu sAOkSXAGsmGw/ui3jghF5kRpM4B/e47EpSGmjQDDre4QiFcxNYBPjUXN+5QzcREuL7hY Z324CvpI76ydg1mPXq3k9vh9nxTZJaTsy8f8HpWfdhV6JhFeByVjkipSKlgqlU1vVgeS 7pkw== 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=TR1u3sRWI99pfiHxerbHetS8AvWmZAq6Zxi2S+X7xBM=; b=cb/z71QdoQM6H88kZgU/m2fjR1EqGcE0UaPVgTho2OvbsdCttrSsOZHjjc/owLDfJL bBL4m0YqF5l9fccRjgENyDgaZpbITQhUfLb2sNcjrFUPEeejFofjF2aJVWyqbh79qCqQ tFVmYu3TwwoQ1YUZGS4cTCMJYF3Mak5ByAI9TPjW7//q+OZLwtvOBJz9L8bybxfisHSO Tbh9A2VNNsYFzPhjLRUUWwe1R6YPsAaTCoYhXrvJx4tSPzZQzsmsNRTcf3t5Z1SSJOq3 WxCVD8PqaDOnPehw6wnjhYB8O9Q5nxa+pL9vYDE+fAM81wDG9YPyBedsmnaC4hA6Zfhe zsuw== X-Gm-Message-State: AOAM533fFAT2+FsmBqm6vbO12aEDnSYR7s06F6th2BMxJMoTqYrIVEiZ 5wXbKx5PzcOhtl8AdUUAkJE= X-Google-Smtp-Source: ABdhPJxCDmVS+t99ctOzw46/3vLLmdX3xjcfGpkIDs27q6CAVrMSuEbFcDMQjaEeDoAnGDHcX6V5uA== X-Received: by 2002:a63:284:: with SMTP id 126mr19484412pgc.347.1625552916756; Mon, 05 Jul 2021 23:28:36 -0700 (PDT) Received: from [192.168.1.18] ([122.163.155.135]) by smtp.gmail.com with ESMTPSA id v21sm1524566pju.47.2021.07.05.23.28.32 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 05 Jul 2021 23:28:35 -0700 (PDT) Subject: Re: [PATCH] block: Avoid accessing an already freed kobject in delete_partition To: Christoph Hellwig Cc: Rajat Asthana , axboe@kernel.dk, damien.lemoal@wdc.com, jack@suse.cz, rafael@kernel.org, syzbot+7d6c5587ec9cff5be65c@syzkaller.appspotmail.com, linux-kernel@vger.kernel.org, ming.lei@redhat.com, linux-block@vger.kernel.org, hare@suse.de, linux-kernel-mentees@lists.linuxfoundation.org References: <20210702231228.261460-1-rajatasthana4@gmail.com> <0c623d71-6d99-2e0d-4d8b-63a1ff814dc1@gmail.com> From: Rajat Asthana Message-ID: <067affa2-827e-06b2-dbc4-c4ae897e1a1a@gmail.com> Date: Tue, 6 Jul 2021 11:58:30 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org > No. There should be no need to check anything, but the code needs > to ensure that the block device is alive. I think the above mentioned > patch (now in Jens' tree) does that, so please try it. Ah! yes, found the patch. I should have checked earlier. thanks -- Rajat