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=-10.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 D6597C43387 for ; Fri, 11 Jan 2019 15:06:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9AF722084C for ; Fri, 11 Jan 2019 15:06:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1547219160; bh=Hx2TIM8oGR0qhusTW3FpDQhIFEZKVlS9qulW6/k9n2g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=pORkhCZEePS8sXKmUXB5iw6xVhUvm3jM2GOYiSp5/MWhKIp5XQ5TGnLS/FBfVAOdD kSYWoibGDmzHrBCdlza7jgdQtqt/Ll61rIMXT1MfGsIqK7Delkt515CFkdESPamBJP ALlUIuXGiCn+Pg9/YFOHQXC+psIHoA9ReWq4lkdo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388246AbfAKO3R (ORCPT ); Fri, 11 Jan 2019 09:29:17 -0500 Received: from mail.kernel.org ([198.145.29.99]:48194 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388684AbfAKO3Q (ORCPT ); Fri, 11 Jan 2019 09:29:16 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.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 0E3952133F; Fri, 11 Jan 2019 14:29:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1547216955; bh=Hx2TIM8oGR0qhusTW3FpDQhIFEZKVlS9qulW6/k9n2g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cGE1Zre9Nxd86WzLZ9QT/lo4/QFPqkja4R/eRsCkRkC9I2R+22NSujgMr6pO/fv35 d/+SpMo3CJ/Uj+XXMwCu3BQlwxDabjHgQKvKn6EDpzIYobZqyt9lvTRV1YIg0QTlfN pc3c3azxpl1CBmaHSxv5mrBi5nn0wH55iCGh+T30= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Vasily Averin , David Teigland , stable@kernel.org Subject: [PATCH 4.9 51/63] dlm: memory leaks on error path in dlm_user_request() Date: Fri, 11 Jan 2019 15:14:54 +0100 Message-Id: <20190111131053.772607133@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190111131046.387528003@linuxfoundation.org> References: <20190111131046.387528003@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Vasily Averin commit d47b41aceeadc6b58abc9c7c6485bef7cfb75636 upstream. According to comment in dlm_user_request() ua should be freed in dlm_free_lkb() after successful attach to lkb. However ua is attached to lkb not in set_lock_args() but later, inside request_lock(). Fixes 597d0cae0f99 ("[DLM] dlm: user locks") Cc: stable@kernel.org # 2.6.19 Signed-off-by: Vasily Averin Signed-off-by: David Teigland Signed-off-by: Greg Kroah-Hartman --- fs/dlm/lock.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) --- a/fs/dlm/lock.c +++ b/fs/dlm/lock.c @@ -5795,20 +5795,20 @@ int dlm_user_request(struct dlm_ls *ls, goto out; } } - - /* After ua is attached to lkb it will be freed by dlm_free_lkb(). - When DLM_IFL_USER is set, the dlm knows that this is a userspace - lock and that lkb_astparam is the dlm_user_args structure. */ - error = set_lock_args(mode, &ua->lksb, flags, namelen, timeout_cs, fake_astfn, ua, fake_bastfn, &args); - lkb->lkb_flags |= DLM_IFL_USER; - if (error) { + kfree(ua->lksb.sb_lvbptr); + ua->lksb.sb_lvbptr = NULL; + kfree(ua); __put_lkb(ls, lkb); goto out; } + /* After ua is attached to lkb it will be freed by dlm_free_lkb(). + When DLM_IFL_USER is set, the dlm knows that this is a userspace + lock and that lkb_astparam is the dlm_user_args structure. */ + lkb->lkb_flags |= DLM_IFL_USER; error = request_lock(ls, lkb, name, namelen, &args); switch (error) {