From patchwork Tue Nov 3 03:07:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiubo Li X-Patchwork-Id: 11875827 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=-3.9 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 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 6137BC00A89 for ; Tue, 3 Nov 2020 03:08:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E5B5F22265 for ; Tue, 3 Nov 2020 03:08:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Ee45ChZR" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725968AbgKCDIV (ORCPT ); Mon, 2 Nov 2020 22:08:21 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:33012 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725913AbgKCDIV (ORCPT ); Mon, 2 Nov 2020 22:08:21 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1604372900; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc; bh=MJYyF6XJcRo4Z+XhoYpQ8eIJ/B8rjWdWWqBVGeI+dmE=; b=Ee45ChZRgJEjJboz+ZGdy8fXNXZwHOl01E2bbyh36dm8QCa9LTBhb5jdLbOfY0CdU3VTup gREE3tdXDyzu8KjXaf61oBHt8jHloYqfukxkGWMe2PxBu8intyp9XizimP2VY6POWZx9gg EB2KZ03mDXPmCkP1P0jKPHDnyJFYMtc= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-255-rDuX3wu-PrOgKPMY8ynODw-1; Mon, 02 Nov 2020 22:08:18 -0500 X-MC-Unique: rDuX3wu-PrOgKPMY8ynODw-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id D2F16809DCD; Tue, 3 Nov 2020 03:08:16 +0000 (UTC) Received: from lxbceph1.gsslab.pek2.redhat.com (vm37-120.gsslab.pek2.redhat.com [10.72.37.120]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1828575127; Tue, 3 Nov 2020 03:08:10 +0000 (UTC) From: xiubli@redhat.com To: josef@toxicpanda.com, axboe@kernel.dk, ming.lei@redhat.com Cc: nbd@other.debian.org, linux-block@vger.kernel.org, jdillama@redhat.com, mgolub@suse.de, Xiubo Li Subject: [PATCH v2 0/2] nbd: fix use-after-freed and double lock bugs Date: Mon, 2 Nov 2020 22:07:56 -0500 Message-Id: <20201103030758.317781-1-xiubli@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Xiubo Li Changed in V2: - fixed possible double lock issue in recv_work(). - adding comments instead to explain why there won't have double lock issue. Xiubo Li (2): nbd: fix use-after-freed crash for nbd->recv_workq nbd: add comments about double lock for config_lock confusion drivers/block/nbd.c | 36 +++++++++++++++++++++++++++++++----- 1 file changed, 31 insertions(+), 5 deletions(-)