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=-8.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_MUTT 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 91425C282DD for ; Thu, 23 May 2019 16:07:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6E7A32175B for ; Thu, 23 May 2019 16:07:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731058AbfEWQHv (ORCPT ); Thu, 23 May 2019 12:07:51 -0400 Received: from gateway34.websitewelcome.com ([192.185.148.140]:19366 "EHLO gateway34.websitewelcome.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730782AbfEWQHv (ORCPT ); Thu, 23 May 2019 12:07:51 -0400 Received: from cm16.websitewelcome.com (cm16.websitewelcome.com [100.42.49.19]) by gateway34.websitewelcome.com (Postfix) with ESMTP id 4D23547AE for ; Thu, 23 May 2019 11:07:50 -0500 (CDT) Received: from gator4166.hostgator.com ([108.167.133.22]) by cmsmtp with SMTP id TqFyhsNLR4FKpTqFyhEl5U; Thu, 23 May 2019 11:07:50 -0500 X-Authority-Reason: nr=8 Received: from [189.250.47.159] (port=40558 helo=embeddedor) by gator4166.hostgator.com with esmtpa (Exim 4.91) (envelope-from ) id 1hTqFx-002N04-8L; Thu, 23 May 2019 11:07:49 -0500 Date: Thu, 23 May 2019 11:07:48 -0500 From: "Gustavo A. R. Silva" To: Patrick Lai , Banajit Goswami , Liam Girdwood , Mark Brown , Jaroslav Kysela , Takashi Iwai Cc: alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, "Gustavo A. R. Silva" Subject: [PATCH] ASoC: qdsp6: q6core: Use struct_size() in kmemdup() Message-ID: <20190523160748.GA4844@embeddedor> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.9.4 (2018-02-28) X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - gator4166.hostgator.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - embeddedor.com X-BWhitelist: no X-Source-IP: 189.250.47.159 X-Source-L: No X-Exim-ID: 1hTqFx-002N04-8L X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: (embeddedor) [189.250.47.159]:40558 X-Source-Auth: gustavo@embeddedor.com X-Email-Count: 8 X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= X-Local-Domain: yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Make use of the struct_size() helper instead of an open-coded version in order to avoid any potential type mistakes, in particular in the context in which this code is being used. So, replace code of the following form: sizeof(*fwk) + fwk->num_services * sizeof(fwk->svc_api_info[0]); with: struct_size(fwk, svc_api_info, fwk->num_services) and so on... Notice that variables bytes and len are unnecessary, hence they are removed. This code was detected with the help of Coccinelle. Signed-off-by: Gustavo A. R. Silva --- sound/soc/qcom/qdsp6/q6core.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/sound/soc/qcom/qdsp6/q6core.c b/sound/soc/qcom/qdsp6/q6core.c index cdfc8ab6cfc0..ae314a652efe 100644 --- a/sound/soc/qcom/qdsp6/q6core.c +++ b/sound/soc/qcom/qdsp6/q6core.c @@ -98,13 +98,13 @@ static int q6core_callback(struct apr_device *adev, struct apr_resp_pkt *data) } case AVCS_CMDRSP_GET_FWK_VERSION: { struct avcs_cmdrsp_get_fwk_version *fwk; - int bytes; fwk = data->payload; - bytes = sizeof(*fwk) + fwk->num_services * - sizeof(fwk->svc_api_info[0]); - core->fwk_version = kmemdup(data->payload, bytes, GFP_ATOMIC); + core->fwk_version = kmemdup(data->payload, + struct_size(fwk, svc_api_info, + fwk->num_services), + GFP_ATOMIC); if (!core->fwk_version) return -ENOMEM; @@ -115,13 +115,13 @@ static int q6core_callback(struct apr_device *adev, struct apr_resp_pkt *data) } case AVCS_GET_VERSIONS_RSP: { struct avcs_cmdrsp_get_version *v; - int len; v = data->payload; - len = sizeof(*v) + v->num_services * sizeof(v->svc_api_info[0]); - - core->svc_version = kmemdup(data->payload, len, GFP_ATOMIC); + core->svc_version = kmemdup(data->payload, + struct_size(v, svc_api_info, + v->num_services), + GFP_ATOMIC); if (!core->svc_version) return -ENOMEM; -- 2.21.0