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=-9.8 required=3.0 tests=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=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 BF719CA9EC9 for ; Mon, 4 Nov 2019 22:05:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 94FE2214D8 for ; Mon, 4 Nov 2019 22:05:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1572905136; bh=u+PDeIpENxF2w8Mc5c9ZgN3DXHT+XJyO2627PXUD5/0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ocdtLz9rqjyDMoeOP9/euhBSoCZVONvyFO31wqTD7ArknARfUVb34cANz/os2hyU8 rkYu1r2wksAjOjRFBmNXiSLbdFnN0WuddgefKH/uqLHquAZoxg7DVuaSqbiSfmWIlJ bxHpyYx0YKCcO138Pd+PAQHLiRFn4WE3cNU256/4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389846AbfKDWFf (ORCPT ); Mon, 4 Nov 2019 17:05:35 -0500 Received: from mail.kernel.org ([198.145.29.99]:36938 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389324AbfKDWFc (ORCPT ); Mon, 4 Nov 2019 17:05:32 -0500 Received: from localhost (6.204-14-84.ripe.coltfrance.com [84.14.204.6]) (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 5A90E214D8; Mon, 4 Nov 2019 22:05:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1572905131; bh=u+PDeIpENxF2w8Mc5c9ZgN3DXHT+XJyO2627PXUD5/0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=W4cf/7qJHtcFQku8b9CTHtQWz2PwKi/hNd7fLkoTTPb5fePfTGht6/9OddHNmRZe8 ++2jvHftLqg/GJxsxEDT6C5YX1OzY8YhTM3nwQWo4m8Fq9g0+T8m+B+RYY3psoUp16 lCl0CqLAH/1Jf26130fB3QID+urewmD7occn4d1Y= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jack Morgenstein , Leon Romanovsky , Jason Gunthorpe , Sasha Levin Subject: [PATCH 5.3 038/163] RDMA/cm: Fix memory leak in cm_add/remove_one Date: Mon, 4 Nov 2019 22:43:48 +0100 Message-Id: <20191104212142.987992009@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191104212140.046021995@linuxfoundation.org> References: <20191104212140.046021995@linuxfoundation.org> User-Agent: quilt/0.66 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 From: Jack Morgenstein [ Upstream commit 94635c36f3854934a46d9e812e028d4721bbb0e6 ] In the process of moving the debug counters sysfs entries, the commit mentioned below eliminated the cm_infiniband sysfs directory. This sysfs directory was tied to the cm_port object allocated in procedure cm_add_one(). Before the commit below, this cm_port object was freed via a call to kobject_put(port->kobj) in procedure cm_remove_port_fs(). Since port no longer uses its kobj, kobject_put(port->kobj) was eliminated. This, however, meant that kfree was never called for the cm_port buffers. Fix this by adding explicit kfree(port) calls to functions cm_add_one() and cm_remove_one(). Note: the kfree call in the first chunk below (in the cm_add_one error flow) fixes an old, undetected memory leak. Fixes: c87e65cfb97c ("RDMA/cm: Move debug counters to be under relevant IB device") Link: https://lore.kernel.org/r/20190916071154.20383-2-leon@kernel.org Signed-off-by: Jack Morgenstein Signed-off-by: Leon Romanovsky Reviewed-by: Jason Gunthorpe Signed-off-by: Jason Gunthorpe Signed-off-by: Sasha Levin --- drivers/infiniband/core/cm.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c index da10e6ccb43cd..5920c0085d35b 100644 --- a/drivers/infiniband/core/cm.c +++ b/drivers/infiniband/core/cm.c @@ -4399,6 +4399,7 @@ error2: error1: port_modify.set_port_cap_mask = 0; port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; + kfree(port); while (--i) { if (!rdma_cap_ib_cm(ib_device, i)) continue; @@ -4407,6 +4408,7 @@ error1: ib_modify_port(ib_device, port->port_num, 0, &port_modify); ib_unregister_mad_agent(port->mad_agent); cm_remove_port_fs(port); + kfree(port); } free: kfree(cm_dev); @@ -4460,6 +4462,7 @@ static void cm_remove_one(struct ib_device *ib_device, void *client_data) spin_unlock_irq(&cm.state_lock); ib_unregister_mad_agent(cur_mad_agent); cm_remove_port_fs(port); + kfree(port); } kfree(cm_dev); -- 2.20.1