From patchwork Mon Aug 17 15:15:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 266477 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, USER_AGENT_GIT autolearn=ham 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 6E2A3C433DF for ; Mon, 17 Aug 2020 15:36:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 318AD22DD6 for ; Mon, 17 Aug 2020 15:36:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597678574; bh=q61iwKxty6pQwSJKWSlbwBdJz6N4UwWGth0ffNuPeBw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=MolhqobWegHbS52xPFQQ9RPJhYxyWDWvEwFLCP/UZdB8YUxxKCnxTp5FTpzIEMxjB ftGblPJ4015z4GOpZgglUMenyHszmYjxQ4vKCMpKgHtFUllEumyw95KvMIg1/Cjh24 H9QIAj1gNyn5r+BbJTYA86YisHfSRjM27d8GB1XU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729880AbgHQPgI (ORCPT ); Mon, 17 Aug 2020 11:36:08 -0400 Received: from mail.kernel.org ([198.145.29.99]:43002 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730472AbgHQPfy (ORCPT ); Mon, 17 Aug 2020 11:35:54 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 66E2A22BEF; Mon, 17 Aug 2020 15:35:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597678554; bh=q61iwKxty6pQwSJKWSlbwBdJz6N4UwWGth0ffNuPeBw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EWyRBvXrX8lt/JhrNzL1vCf5gnw1QUZ/BQgIOskfzQv18hMzmSOW7ombx8ZdyPxHT c2Oa0il/+NPrQB+Nn0VS0w2tITfu5vw8ssN6BwuB6pP5VgoS9rzkKvBUcMhUui6uLr IgxQnQ3Z9IA55/AoFz9SE+a/vf8FEOufc5hognZw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hulk Robot , Wang Hai , David Teigland , Sasha Levin Subject: [PATCH 5.8 374/464] dlm: Fix kobject memleak Date: Mon, 17 Aug 2020 17:15:27 +0200 Message-Id: <20200817143851.687829580@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200817143833.737102804@linuxfoundation.org> References: <20200817143833.737102804@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Wang Hai [ Upstream commit 0ffddafc3a3970ef7013696e7f36b3d378bc4c16 ] Currently the error return path from kobject_init_and_add() is not followed by a call to kobject_put() - which means we are leaking the kobject. Set do_unreg = 1 before kobject_init_and_add() to ensure that kobject_put() can be called in its error patch. Fixes: 901195ed7f4b ("Kobject: change GFS2 to use kobject_init_and_add") Reported-by: Hulk Robot Signed-off-by: Wang Hai Signed-off-by: David Teigland Signed-off-by: Sasha Levin --- fs/dlm/lockspace.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c index e93670ecfae5b..624617c12250a 100644 --- a/fs/dlm/lockspace.c +++ b/fs/dlm/lockspace.c @@ -622,6 +622,9 @@ static int new_lockspace(const char *name, const char *cluster, wait_event(ls->ls_recover_lock_wait, test_bit(LSFL_RECOVER_LOCK, &ls->ls_flags)); + /* let kobject handle freeing of ls if there's an error */ + do_unreg = 1; + ls->ls_kobj.kset = dlm_kset; error = kobject_init_and_add(&ls->ls_kobj, &dlm_ktype, NULL, "%s", ls->ls_name); @@ -629,9 +632,6 @@ static int new_lockspace(const char *name, const char *cluster, goto out_recoverd; kobject_uevent(&ls->ls_kobj, KOBJ_ADD); - /* let kobject handle freeing of ls if there's an error */ - do_unreg = 1; - /* This uevent triggers dlm_controld in userspace to add us to the group of nodes that are members of this lockspace (managed by the cluster infrastructure.) Once it's done that, it tells us who the