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_PASS,URIBL_BLOCKED, USER_AGENT_MUTT 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 3A974C4360F for ; Wed, 3 Apr 2019 16:15:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 07603206B7 for ; Wed, 3 Apr 2019 16:15:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726315AbfDCQPI (ORCPT ); Wed, 3 Apr 2019 12:15:08 -0400 Received: from gateway33.websitewelcome.com ([192.185.145.9]:27761 "EHLO gateway33.websitewelcome.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725990AbfDCQPI (ORCPT ); Wed, 3 Apr 2019 12:15:08 -0400 Received: from cm17.websitewelcome.com (cm17.websitewelcome.com [100.42.49.20]) by gateway33.websitewelcome.com (Postfix) with ESMTP id 2A053B9EAAF for ; Wed, 3 Apr 2019 10:48:38 -0500 (CDT) Received: from gator4166.hostgator.com ([108.167.133.22]) by cmsmtp with SMTP id Bi7yh2SCo90onBi7yhG9bP; Wed, 03 Apr 2019 10:48:38 -0500 X-Authority-Reason: nr=8 Received: from [189.250.114.183] (port=41732 helo=embeddedor) by gator4166.hostgator.com with esmtpa (Exim 4.91) (envelope-from ) id 1hBi7x-0010gn-7E; Wed, 03 Apr 2019 10:48:37 -0500 Date: Wed, 3 Apr 2019 10:48:35 -0500 From: "Gustavo A. R. Silva" To: Kalle Valo , "David S. Miller" Cc: linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, "Gustavo A. R. Silva" Subject: [PATCH][next] ath6kl: debug: Use struct_size() helper Message-ID: <20190403154835.GA20955@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: 189.250.114.183 X-Source-L: No X-Exim-ID: 1hBi7x-0010gn-7E X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: (embeddedor) [189.250.114.183]:41732 X-Source-Auth: gustavo@embeddedor.com X-Email-Count: 14 X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= X-Local-Domain: yes Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@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, change the following form: sizeof(*tbl) + num_entries * sizeof(struct wmi_bss_roam_info) to : struct_size(tbl, info, num_entries) This code was detected with the help of Coccinelle. Signed-off-by: Gustavo A. R. Silva --- drivers/net/wireless/ath/ath6kl/debug.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/ath6kl/debug.c b/drivers/net/wireless/ath/ath6kl/debug.c index 4e94b22eaada..54337d60f288 100644 --- a/drivers/net/wireless/ath/ath6kl/debug.c +++ b/drivers/net/wireless/ath/ath6kl/debug.c @@ -1132,8 +1132,7 @@ int ath6kl_debug_roam_tbl_event(struct ath6kl *ar, const void *buf, tbl = (const struct wmi_target_roam_tbl *) buf; num_entries = le16_to_cpu(tbl->num_entries); - if (sizeof(*tbl) + num_entries * sizeof(struct wmi_bss_roam_info) > - len) + if (struct_size(tbl, info, num_entries) > len) return -EINVAL; if (ar->debug.roam_tbl == NULL || -- 2.21.0