From patchwork Thu Jan 19 06:35:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ping-Ke Shih X-Patchwork-Id: 645051 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4B6B0C38142 for ; Thu, 19 Jan 2023 06:36:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229797AbjASGgB (ORCPT ); Thu, 19 Jan 2023 01:36:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54982 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229656AbjASGf6 (ORCPT ); Thu, 19 Jan 2023 01:35:58 -0500 Received: from rtits2.realtek.com.tw (rtits2.realtek.com [211.75.126.72]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 0051F3C21 for ; Wed, 18 Jan 2023 22:35:56 -0800 (PST) Authenticated-By: X-SpamFilter-By: ArmorX SpamTrap 5.77 with qID 30J6Zm222012547, This message is accepted by code: ctloc85258 Received: from mail.realtek.com (rtexh36505.realtek.com.tw[172.21.6.25]) by rtits2.realtek.com.tw (8.15.2/2.81/5.90) with ESMTPS id 30J6Zm222012547 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=FAIL); Thu, 19 Jan 2023 14:35:49 +0800 Received: from RTEXMBS04.realtek.com.tw (172.21.6.97) by RTEXH36505.realtek.com.tw (172.21.6.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.32; Thu, 19 Jan 2023 14:35:50 +0800 Received: from localhost (172.21.69.188) by RTEXMBS04.realtek.com.tw (172.21.6.97) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.7; Thu, 19 Jan 2023 14:35:49 +0800 From: Ping-Ke Shih To: CC: , Subject: [PATCH 1/2] wifi: rtw89: debug: avoid invalid access on RTW89_DBG_SEL_MAC_30 Date: Thu, 19 Jan 2023 14:35:28 +0800 Message-ID: <20230119063529.61563-2-pkshih@realtek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230119063529.61563-1-pkshih@realtek.com> References: <20230119063529.61563-1-pkshih@realtek.com> MIME-Version: 1.0 X-Originating-IP: [172.21.69.188] X-ClientProxiedBy: RTEXMBS02.realtek.com.tw (172.21.6.95) To RTEXMBS04.realtek.com.tw (172.21.6.97) X-KSE-ServerInfo: RTEXMBS04.realtek.com.tw, 9 X-KSE-AntiSpam-Interceptor-Info: trusted connection X-KSE-Antiphishing-Info: Clean X-KSE-Antiphishing-ScanningType: Deterministic X-KSE-Antiphishing-Method: None X-KSE-Antiphishing-Bases: 01/19/2023 06:15:00 X-KSE-AttachmentFiltering-Interceptor-Info: no applicable attachment filtering rules found X-KSE-Antivirus-Interceptor-Info: scan successful X-KSE-Antivirus-Info: =?big5_tw?b?Q2xlYW4sIGJhc2VzOiAyMDIzLzEvMTkgpFekyCAwMzoz?= =?big5_tw?b?NzowMA==?= X-KSE-BulkMessagesFiltering-Scan-Result: protection disabled X-KSE-ServerInfo: RTEXH36505.realtek.com.tw, 9 X-KSE-Attachment-Filter-Triggered-Rules: Clean X-KSE-Attachment-Filter-Triggered-Filters: Clean X-KSE-BulkMessagesFiltering-Scan-Result: protection disabled Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Zong-Zhe Yang Only 8852C chip has valid pages on RTW89_DBG_SEL_MAC_30. To other chips, this section is an address hole. It will lead to crash if trying to access this section on chips except for 8852C. So, we avoid that. Signed-off-by: Zong-Zhe Yang Signed-off-by: Ping-Ke Shih --- drivers/net/wireless/realtek/rtw89/debug.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/net/wireless/realtek/rtw89/debug.c b/drivers/net/wireless/realtek/rtw89/debug.c index 8297e35bfa52b..6730eea930ece 100644 --- a/drivers/net/wireless/realtek/rtw89/debug.c +++ b/drivers/net/wireless/realtek/rtw89/debug.c @@ -615,6 +615,7 @@ rtw89_debug_priv_mac_reg_dump_select(struct file *filp, struct seq_file *m = (struct seq_file *)filp->private_data; struct rtw89_debugfs_priv *debugfs_priv = m->private; struct rtw89_dev *rtwdev = debugfs_priv->rtwdev; + const struct rtw89_chip_info *chip = rtwdev->chip; char buf[32]; size_t buf_size; int sel; @@ -634,6 +635,12 @@ rtw89_debug_priv_mac_reg_dump_select(struct file *filp, return -EINVAL; } + if (sel == RTW89_DBG_SEL_MAC_30 && chip->chip_id != RTL8852C) { + rtw89_info(rtwdev, "sel %d is address hole on chip %d\n", sel, + chip->chip_id); + return -EINVAL; + } + debugfs_priv->cb_data = sel; rtw89_info(rtwdev, "select mac page dump %d\n", debugfs_priv->cb_data);