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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F095FC433EF for ; Mon, 24 Jan 2022 23:59:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1385403AbiAXX6a (ORCPT ); Mon, 24 Jan 2022 18:58:30 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49676 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1846072AbiAXXOW (ORCPT ); Mon, 24 Jan 2022 18:14:22 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CDABEC06F8D0; Mon, 24 Jan 2022 13:22:58 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 71719B81243; Mon, 24 Jan 2022 21:22:58 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 95CAAC340E4; Mon, 24 Jan 2022 21:22:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643059377; bh=lGJRpRCjDTX1CV5Q8d9zP8u0eeWcNT5bB1+N9cZQVD8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KKhY1akFeoIumrQEN38z2ru4SxCsc0WRxYze5fhYWVrX0lcCjGunYca9pl6UD17jm cBFji3CWtPgUwkFl9F2WJmnyVXK/in0Gygt0X+aa3zMqmV4jkBpxBBj3ANQLGd2dW7 HvEVKuYDJDHPsiilMkQoou8QugojanOvY6bxHcIo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , Ping-Ke Shih , Kalle Valo , Sasha Levin Subject: [PATCH 5.16 0596/1039] rtw89: fix potentially access out of range of RF register array Date: Mon, 24 Jan 2022 19:39:45 +0100 Message-Id: <20220124184145.369990067@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124184125.121143506@linuxfoundation.org> References: <20220124184125.121143506@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Ping-Ke Shih [ Upstream commit 30101812a09b37bc8aa409a83f603d4c072198f2 ] The RF register array is used to help firmware to restore RF settings. The original code can potentially access out of range, if the size is between (RTW89_H2C_RF_PAGE_SIZE * RTW89_H2C_RF_PAGE_NUM + 1) to ((RTW89_H2C_RF_PAGE_SIZE + 1) * RTW89_H2C_RF_PAGE_NUM). Fortunately, current used size doesn't fall into the wrong case, and the size will not change if we don't update RF parameter. Reported-by: Dan Carpenter Signed-off-by: Ping-Ke Shih Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20211119055729.12826-1-pkshih@realtek.com Signed-off-by: Sasha Levin --- drivers/net/wireless/realtek/rtw89/phy.c | 33 ++++++++++++++---------- 1 file changed, 19 insertions(+), 14 deletions(-) diff --git a/drivers/net/wireless/realtek/rtw89/phy.c b/drivers/net/wireless/realtek/rtw89/phy.c index ab134856baac7..d75e9de8df7c6 100644 --- a/drivers/net/wireless/realtek/rtw89/phy.c +++ b/drivers/net/wireless/realtek/rtw89/phy.c @@ -654,6 +654,12 @@ rtw89_phy_cofig_rf_reg_store(struct rtw89_dev *rtwdev, u16 idx = info->curr_idx % RTW89_H2C_RF_PAGE_SIZE; u8 page = info->curr_idx / RTW89_H2C_RF_PAGE_SIZE; + if (page >= RTW89_H2C_RF_PAGE_NUM) { + rtw89_warn(rtwdev, "RF parameters exceed size. path=%d, idx=%d", + rf_path, info->curr_idx); + return; + } + info->rtw89_phy_config_rf_h2c[page][idx] = cpu_to_le32((reg->addr << 20) | reg->data); info->curr_idx++; @@ -662,30 +668,29 @@ rtw89_phy_cofig_rf_reg_store(struct rtw89_dev *rtwdev, static int rtw89_phy_config_rf_reg_fw(struct rtw89_dev *rtwdev, struct rtw89_fw_h2c_rf_reg_info *info) { - u16 page = info->curr_idx / RTW89_H2C_RF_PAGE_SIZE; - u16 len = (info->curr_idx % RTW89_H2C_RF_PAGE_SIZE) * 4; + u16 remain = info->curr_idx; + u16 len = 0; u8 i; int ret = 0; - if (page > RTW89_H2C_RF_PAGE_NUM) { + if (remain > RTW89_H2C_RF_PAGE_NUM * RTW89_H2C_RF_PAGE_SIZE) { rtw89_warn(rtwdev, - "rf reg h2c total page num %d larger than %d (RTW89_H2C_RF_PAGE_NUM)\n", - page, RTW89_H2C_RF_PAGE_NUM); - return -EINVAL; + "rf reg h2c total len %d larger than %d\n", + remain, RTW89_H2C_RF_PAGE_NUM * RTW89_H2C_RF_PAGE_SIZE); + ret = -EINVAL; + goto out; } - for (i = 0; i < page; i++) { - ret = rtw89_fw_h2c_rf_reg(rtwdev, info, - RTW89_H2C_RF_PAGE_SIZE * 4, i); + for (i = 0; i < RTW89_H2C_RF_PAGE_NUM && remain; i++, remain -= len) { + len = remain > RTW89_H2C_RF_PAGE_SIZE ? RTW89_H2C_RF_PAGE_SIZE : remain; + ret = rtw89_fw_h2c_rf_reg(rtwdev, info, len * 4, i); if (ret) - return ret; + goto out; } - ret = rtw89_fw_h2c_rf_reg(rtwdev, info, len, i); - if (ret) - return ret; +out: info->curr_idx = 0; - return 0; + return ret; } static void rtw89_phy_config_rf_reg(struct rtw89_dev *rtwdev, -- 2.34.1