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=-5.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 2DF43C2BA83 for ; Wed, 12 Feb 2020 08:59:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 05D5820714 for ; Wed, 12 Feb 2020 08:59:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728537AbgBLI7k (ORCPT ); Wed, 12 Feb 2020 03:59:40 -0500 Received: from mga17.intel.com ([192.55.52.151]:27183 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728150AbgBLI7k (ORCPT ); Wed, 12 Feb 2020 03:59:40 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga107.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 12 Feb 2020 00:59:39 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,428,1574150400"; d="scan'208";a="406231370" Received: from mattu-haswell.fi.intel.com (HELO [10.237.72.170]) ([10.237.72.170]) by orsmga005.jf.intel.com with ESMTP; 12 Feb 2020 00:59:36 -0800 Subject: Re: [RFT PATCH v2] xhci: Fix memory leak when caching protocol extended capability PSI tables To: Greg KH , Marek Szyprowski Cc: pmenzel@molgen.mpg.de, mika.westerberg@linux.intel.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org, krzk@kernel.org, stable References: <20d0559f-8d0f-42f5-5ebf-7f658a172161@linux.intel.com> <20200211150158.14475-1-mathias.nyman@linux.intel.com> <20200211161316.GA1914687@kroah.com> From: Mathias Nyman Openpgp: preference=signencrypt Autocrypt: addr=mathias.nyman@linux.intel.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <20200211161316.GA1914687@kroah.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org On 11.2.2020 18.13, Greg KH wrote: > On Tue, Feb 11, 2020 at 04:12:40PM +0100, Marek Szyprowski wrote: >> Hi Mathias, >> >> On 11.02.2020 16:01, Mathias Nyman wrote: >>> xhci driver assumed that xHC controllers have at most one custom >>> supported speed table (PSI) for all usb 3.x ports. >>> Memory was allocated for one PSI table under the xhci hub structure. >>> >>> Turns out this is not the case, some controllers have a separate >>> "supported protocol capability" entry with a PSI table for each port. >>> This means each usb3 roothub port can in theory support different custom >>> speeds. >>> >>> To solve this, cache all supported protocol capabilities with their PSI >>> tables in an array, and add pointers to the xhci port structure so that >>> every port points to its capability entry in the array. >>> >>> When creating the SuperSpeedPlus USB Device Capability BOS descriptor >>> for the xhci USB 3.1 roothub we for now will use only data from the >>> first USB 3.1 capable protocol capability entry in the array. >>> This could be improved later, this patch focuses resolving >>> the memory leak. >>> >>> Reported-by: Paul Menzel >>> Reported-by: Sajja Venkateswara Rao >>> Fixes: 47189098f8be ("xhci: parse xhci protocol speed ID list for usb 3.1 usage") >>> Cc: stable # v4.4+ >>> Signed-off-by: Mathias Nyman >> >> Tested-by: Marek Szyprowski > > Nice! > > Should I revert the first and then apply this? > Yes, please Thanks -Mathias