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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT 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 B2F7BC4332F for ; Thu, 16 Sep 2021 17:42:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9CA916124F for ; Thu, 16 Sep 2021 17:42:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344979AbhIPRnZ (ORCPT ); Thu, 16 Sep 2021 13:43:25 -0400 Received: from mail.kernel.org ([198.145.29.99]:54230 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347950AbhIPRgV (ORCPT ); Thu, 16 Sep 2021 13:36:21 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id EF06961A78; Thu, 16 Sep 2021 16:49:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1631810967; bh=UhJbAOTg8rw5DkHiDRKHLx50nt/i+eF0c2XS6wFmyr4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iL8XDmpfg71WyGUKZPIShxNsUv0bilA9wrMft8x9RUSTM8ZNALR3G/1IQlzFo/sAE YTTQKF6VYAM9BBQ+HQydlBCjU1ZP9JrgEa6J4HJ9AgwjyYwe4vWWURTo0kQ/UWW7Ci jpmuJ8PllI4yJTEKgkepK+J64pFwkoQoK776ViLE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Chin-Yen Lee , Ping-Ke Shih , Kalle Valo , Sasha Levin Subject: [PATCH 5.14 333/432] rtw88: wow: fix size access error of probe request Date: Thu, 16 Sep 2021 18:01:22 +0200 Message-Id: <20210916155822.129648171@linuxfoundation.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210916155810.813340753@linuxfoundation.org> References: <20210916155810.813340753@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: linux-kernel@vger.kernel.org From: Chin-Yen Lee [ Upstream commit 69c7044526d984df672b8d9b6d6998c34617cde4 ] Current flow will lead to null ptr access because of trying to get the size of freed probe-request packets. We store the information of packet size into rsvd page instead and also fix the size error issue, which will cause unstable behavoir of sending probe request by wow firmware. Signed-off-by: Chin-Yen Lee Signed-off-by: Ping-Ke Shih Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20210728014335.8785-6-pkshih@realtek.com Signed-off-by: Sasha Levin --- drivers/net/wireless/realtek/rtw88/fw.c | 8 ++++++-- drivers/net/wireless/realtek/rtw88/fw.h | 1 + 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/realtek/rtw88/fw.c b/drivers/net/wireless/realtek/rtw88/fw.c index 3bfa5ecc0053..e6399519584b 100644 --- a/drivers/net/wireless/realtek/rtw88/fw.c +++ b/drivers/net/wireless/realtek/rtw88/fw.c @@ -819,7 +819,7 @@ static u16 rtw_get_rsvd_page_probe_req_size(struct rtw_dev *rtwdev, continue; if ((!ssid && !rsvd_pkt->ssid) || rtw_ssid_equal(rsvd_pkt->ssid, ssid)) - size = rsvd_pkt->skb->len; + size = rsvd_pkt->probe_req_size; } return size; @@ -1047,6 +1047,8 @@ static struct sk_buff *rtw_get_rsvd_page_skb(struct ieee80211_hw *hw, ssid->ssid_len, 0); else skb_new = ieee80211_probereq_get(hw, vif->addr, NULL, 0, 0); + if (skb_new) + rsvd_pkt->probe_req_size = (u16)skb_new->len; break; case RSVD_NLO_INFO: skb_new = rtw_nlo_info_get(hw); @@ -1643,6 +1645,7 @@ int rtw_fw_dump_fifo(struct rtw_dev *rtwdev, u8 fifo_sel, u32 addr, u32 size, static void __rtw_fw_update_pkt(struct rtw_dev *rtwdev, u8 pkt_id, u16 size, u8 location) { + struct rtw_chip_info *chip = rtwdev->chip; u8 h2c_pkt[H2C_PKT_SIZE] = {0}; u16 total_size = H2C_PKT_HDR_SIZE + H2C_PKT_UPDATE_PKT_LEN; @@ -1653,6 +1656,7 @@ static void __rtw_fw_update_pkt(struct rtw_dev *rtwdev, u8 pkt_id, u16 size, UPDATE_PKT_SET_LOCATION(h2c_pkt, location); /* include txdesc size */ + size += chip->tx_pkt_desc_sz; UPDATE_PKT_SET_SIZE(h2c_pkt, size); rtw_fw_send_h2c_packet(rtwdev, h2c_pkt); @@ -1662,7 +1666,7 @@ void rtw_fw_update_pkt_probe_req(struct rtw_dev *rtwdev, struct cfg80211_ssid *ssid) { u8 loc; - u32 size; + u16 size; loc = rtw_get_rsvd_page_probe_req_location(rtwdev, ssid); if (!loc) { diff --git a/drivers/net/wireless/realtek/rtw88/fw.h b/drivers/net/wireless/realtek/rtw88/fw.h index a8a7162fbe64..a3a28ac6f1de 100644 --- a/drivers/net/wireless/realtek/rtw88/fw.h +++ b/drivers/net/wireless/realtek/rtw88/fw.h @@ -147,6 +147,7 @@ struct rtw_rsvd_page { u8 page; bool add_txdesc; struct cfg80211_ssid *ssid; + u16 probe_req_size; }; enum rtw_keep_alive_pkt_type { -- 2.30.2