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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 37D33C64E7A for ; Tue, 17 Nov 2020 13:53:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D5AA5208B8 for ; Tue, 17 Nov 2020 13:53:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="C+1rdvH0" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731256AbgKQN2e (ORCPT ); Tue, 17 Nov 2020 08:28:34 -0500 Received: from mail.kernel.org ([198.145.29.99]:34290 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731504AbgKQN0o (ORCPT ); Tue, 17 Nov 2020 08:26:44 -0500 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id F2EC3206D5; Tue, 17 Nov 2020 13:26:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1605619604; bh=1QT9HRE/DdywlrkuAxGHltvhDA0FbHg4eUI177LYd1U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=C+1rdvH0JiTNxgwanKDfdIGzNmO7UfrBjO9r9ORH7NJaa2X2hS1Ky1IKYOuInQ4Xo N+GcI5E43F7W15W7BfDqijWoGrItTj+z1VCJKiok8grkURMPL/GJgaXsEKThG3+YkA IgflYZ2O50F1k09yLIRZ3idf1gxGDKI79p3/X7/8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Christoph Hellwig , Josef Bacik , Jens Axboe , Sasha Levin Subject: [PATCH 5.4 094/151] nbd: fix a block_device refcount leak in nbd_release Date: Tue, 17 Nov 2020 14:05:24 +0100 Message-Id: <20201117122125.980260339@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201117122121.381905960@linuxfoundation.org> References: <20201117122121.381905960@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Christoph Hellwig [ Upstream commit 2bd645b2d3f0bacadaa6037f067538e1cd4e42ef ] bdget_disk needs to be paired with bdput to not leak a reference on the block device inode. Fixes: 08ba91ee6e2c ("nbd: Add the nbd NBD_DISCONNECT_ON_CLOSE config flag.") Signed-off-by: Christoph Hellwig Reviewed-by: Josef Bacik Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- drivers/block/nbd.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 62a873718b5bb..a3037fe54c3ab 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -1503,6 +1503,7 @@ static void nbd_release(struct gendisk *disk, fmode_t mode) if (test_bit(NBD_RT_DISCONNECT_ON_CLOSE, &nbd->config->runtime_flags) && bdev->bd_openers == 0) nbd_disconnect_and_put(nbd); + bdput(bdev); nbd_config_put(nbd); nbd_put(nbd); -- 2.27.0