From patchwork Tue Aug 29 13:29:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Johnson X-Patchwork-Id: 13368972 X-Patchwork-Delegate: kvalo@adurom.com 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 58AE2C83F18 for ; Tue, 29 Aug 2023 13:31:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236060AbjH2Nay (ORCPT ); Tue, 29 Aug 2023 09:30:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51552 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236001AbjH2Nab (ORCPT ); Tue, 29 Aug 2023 09:30:31 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2BF9318F; Tue, 29 Aug 2023 06:30:29 -0700 (PDT) Received: from pps.filterd (m0279863.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 37TBvnpU014527; Tue, 29 Aug 2023 13:30:07 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : date : subject : mime-version : content-type : content-transfer-encoding : message-id : references : in-reply-to : to : cc; s=qcppdkim1; bh=QSpOBhGDEboerpYfQTdunBKU7yMaQ08FvJIYYJHw0uA=; b=iEe0EiPoLScS0li1KUKmdOk0cWxWQc8DhsaD0fBRovuXBBCh+jb58DXifDjN2cMXpK2w TJk7QtxgG02zMPItdLfgkaWSOcxAf7VbLSk4fjM3ib68fYrpaeumFDX0qp7r+aI17RjE E0FIqKpxzd+BCXcBDTAABGtBsZWOqnzKB16YSJ1nyuKqUUogxQiXqV83DpeuKrMQuHyG aQ1oe2mz06nyZUOm8+j+WwkruVnKf1E1Du2UtT4blB2PrfROLdfLkYmUJ2uUW0CZJFXz 1n8zEPzudacXfp9qFsCICnw0+PUgzUzR7pUVlfhhbaKp9cqjhJK8sBNnC8WjY64zGfX8 8Q== Received: from nalasppmta04.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3ss7meseh5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 29 Aug 2023 13:30:06 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA04.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 37TDU6Tx031789 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 29 Aug 2023 13:30:06 GMT Received: from hu-jjohnson-lv.qualcomm.com (10.49.16.6) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.36; Tue, 29 Aug 2023 06:30:03 -0700 From: Jeff Johnson Date: Tue, 29 Aug 2023 06:29:36 -0700 Subject: [PATCH v2 1/2] wifi: cw1200: Avoid processing an invalid TIM IE MIME-Version: 1.0 Message-ID: <20230829-ieee80211_tim_ie-v2-1-fdaf19fb1c0e@quicinc.com> References: <20230829-ieee80211_tim_ie-v2-0-fdaf19fb1c0e@quicinc.com> In-Reply-To: <20230829-ieee80211_tim_ie-v2-0-fdaf19fb1c0e@quicinc.com> To: , Kalle Valo , =?utf-8?q?Toke_H?= =?utf-8?q?=C3=B8iland-J=C3=B8rgensen?= , "Christian Lamparter" , Stanislaw Gruszka , "Helmut Schaa" , Ping-Ke Shih , Johannes Berg , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni CC: , , , Jeff Johnson X-Mailer: b4 0.12.3 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01b.na.qualcomm.com (10.47.209.197) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: 2TLM-G4UVmX0kCp65y5iSYbnX96Ylw-- X-Proofpoint-GUID: 2TLM-G4UVmX0kCp65y5iSYbnX96Ylw-- X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.601,FMLib:17.11.176.26 definitions=2023-08-29_10,2023-08-29_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 mlxscore=0 bulkscore=0 adultscore=0 suspectscore=0 lowpriorityscore=0 malwarescore=0 mlxlogscore=694 phishscore=0 priorityscore=1501 clxscore=1015 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2308100000 definitions=main-2308290117 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org While converting struct ieee80211_tim_ie::virtual_map to be a flexible array it was observed that the TIM IE processing in cw1200_rx_cb() could potentially process a malformed IE in a manner that could result in a buffer over-read. Add logic to verify that the TIM IE length is large enough to hold a valid TIM payload before processing it. Signed-off-by: Jeff Johnson --- drivers/net/wireless/st/cw1200/txrx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/st/cw1200/txrx.c b/drivers/net/wireless/st/cw1200/txrx.c index 6894b919ff94..e16e9ae90d20 100644 --- a/drivers/net/wireless/st/cw1200/txrx.c +++ b/drivers/net/wireless/st/cw1200/txrx.c @@ -1166,7 +1166,7 @@ void cw1200_rx_cb(struct cw1200_common *priv, size_t ies_len = skb->len - (ies - (u8 *)(skb->data)); tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies, ies_len); - if (tim_ie) { + if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *)&tim_ie[2]; From patchwork Tue Aug 29 13:29:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Johnson X-Patchwork-Id: 13368973 X-Patchwork-Delegate: johannes@sipsolutions.net 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 6768AC6FA8F for ; Tue, 29 Aug 2023 13:31:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234713AbjH2Nay (ORCPT ); Tue, 29 Aug 2023 09:30:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51558 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236036AbjH2Nac (ORCPT ); Tue, 29 Aug 2023 09:30:32 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6442D198; Tue, 29 Aug 2023 06:30:29 -0700 (PDT) Received: from pps.filterd (m0279867.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 37TCwoTr030060; Tue, 29 Aug 2023 13:30:08 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : date : subject : mime-version : content-type : content-transfer-encoding : message-id : references : in-reply-to : to : cc; s=qcppdkim1; bh=HikdfEPewUbomLXDhgfprFBBhu34LDZC++vWv7prWrA=; b=TCoIJ7OemOHKccmIutFAaVnq1uY+3OrSzHJ5jTR2V/CzPTmHdvWJEsdfq3gnrMaXK/MG F8B0DwdCrMIcx73XHMDToIZ2hYnYywMToy7wuW9IDzwPm0ccvoR8uhCSp2ixlKkSsmvX XsoL5nJmgNExnBaZ89vEaml79V7/JEJHRC5LMUae6Set3aLFYwmKF8H8541FWmfb+GJ5 SzbtbXgqzn2rAk2KHvMpXJ+8QWe0p6r0Fuk2I/f9SbmipXiAjbnmtCvS/BoFwl6vMd1G 2LYSSp8LJ3XhE5Wh7GpCPKQ40iYcRJHgt6U9XqX4b4SJMPtSCGO8YeRmr7eqn16kcq8o CA== Received: from nalasppmta02.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3ss3fr1ttt-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 29 Aug 2023 13:30:08 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 37TDU6Sq010880 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 29 Aug 2023 13:30:06 GMT Received: from hu-jjohnson-lv.qualcomm.com (10.49.16.6) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.36; Tue, 29 Aug 2023 06:30:03 -0700 From: Jeff Johnson Date: Tue, 29 Aug 2023 06:29:37 -0700 Subject: [PATCH v2 2/2] mac80211: Use flexible array in struct ieee80211_tim_ie MIME-Version: 1.0 Message-ID: <20230829-ieee80211_tim_ie-v2-2-fdaf19fb1c0e@quicinc.com> References: <20230829-ieee80211_tim_ie-v2-0-fdaf19fb1c0e@quicinc.com> In-Reply-To: <20230829-ieee80211_tim_ie-v2-0-fdaf19fb1c0e@quicinc.com> To: , Kalle Valo , =?utf-8?q?Toke_H?= =?utf-8?q?=C3=B8iland-J=C3=B8rgensen?= , "Christian Lamparter" , Stanislaw Gruszka , "Helmut Schaa" , Ping-Ke Shih , Johannes Berg , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni CC: , , , Jeff Johnson X-Mailer: b4 0.12.3 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01b.na.qualcomm.com (10.47.209.197) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: c8Yg4LibsIbzIdNmO4rE9UfA-J2Zd4-r X-Proofpoint-ORIG-GUID: c8Yg4LibsIbzIdNmO4rE9UfA-J2Zd4-r X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.601,FMLib:17.11.176.26 definitions=2023-08-29_10,2023-08-29_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 mlxscore=0 adultscore=0 spamscore=0 phishscore=0 bulkscore=0 mlxlogscore=940 impostorscore=0 suspectscore=0 lowpriorityscore=0 malwarescore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2308100000 definitions=main-2308290117 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Currently struct ieee80211_tim_ie defines: u8 virtual_map[1]; Per the guidance in [1] change this to be a flexible array. As a result of this change, adjust all related struct size tests to account for the fact that the sizeof(struct ieee80211_tim_ie) now accounts for the minimum size of the virtual_map. [1] https://docs.kernel.org/process/deprecated.html#zero-length-and-one-element-arrays Signed-off-by: Jeff Johnson --- drivers/net/wireless/ath/ath9k/recv.c | 2 +- drivers/net/wireless/ath/carl9170/rx.c | 2 +- drivers/net/wireless/ralink/rt2x00/rt2x00dev.c | 2 +- drivers/net/wireless/realtek/rtlwifi/ps.c | 2 +- drivers/net/wireless/st/cw1200/txrx.c | 2 +- include/linux/ieee80211.h | 4 ++-- net/mac80211/util.c | 2 +- 7 files changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c index 0c0624a3b40d..2a263a1b7fbf 100644 --- a/drivers/net/wireless/ath/ath9k/recv.c +++ b/drivers/net/wireless/ath/ath9k/recv.c @@ -520,7 +520,7 @@ static bool ath_beacon_dtim_pending_cab(struct sk_buff *skb) break; if (id == WLAN_EID_TIM) { - if (elen < sizeof(*tim)) + if (elen <= sizeof(*tim)) break; tim = (struct ieee80211_tim_ie *) pos; if (tim->dtim_count != 0) diff --git a/drivers/net/wireless/ath/carl9170/rx.c b/drivers/net/wireless/ath/carl9170/rx.c index 908c4c8b7f82..5bdbde8c98a3 100644 --- a/drivers/net/wireless/ath/carl9170/rx.c +++ b/drivers/net/wireless/ath/carl9170/rx.c @@ -542,7 +542,7 @@ static void carl9170_ps_beacon(struct ar9170 *ar, void *data, unsigned int len) if (!tim) return; - if (tim[1] < sizeof(*tim_ie)) + if (tim[1] <= sizeof(*tim_ie)) return; tim_len = tim[1]; diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00dev.c b/drivers/net/wireless/ralink/rt2x00/rt2x00dev.c index 9a9cfd0ce402..f594835da7ce 100644 --- a/drivers/net/wireless/ralink/rt2x00/rt2x00dev.c +++ b/drivers/net/wireless/ralink/rt2x00/rt2x00dev.c @@ -669,7 +669,7 @@ static void rt2x00lib_rxdone_check_ps(struct rt2x00_dev *rt2x00dev, if (!tim) return; - if (tim[1] < sizeof(*tim_ie)) + if (tim[1] <= sizeof(*tim_ie)) return; tim_len = tim[1]; diff --git a/drivers/net/wireless/realtek/rtlwifi/ps.c b/drivers/net/wireless/realtek/rtlwifi/ps.c index 629c03271bde..ea4b055bc6d8 100644 --- a/drivers/net/wireless/realtek/rtlwifi/ps.c +++ b/drivers/net/wireless/realtek/rtlwifi/ps.c @@ -506,7 +506,7 @@ void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len) if (!tim) return; - if (tim[1] < sizeof(*tim_ie)) + if (tim[1] <= sizeof(*tim_ie)) return; tim_len = tim[1]; diff --git a/drivers/net/wireless/st/cw1200/txrx.c b/drivers/net/wireless/st/cw1200/txrx.c index e16e9ae90d20..c2a51cd79ab8 100644 --- a/drivers/net/wireless/st/cw1200/txrx.c +++ b/drivers/net/wireless/st/cw1200/txrx.c @@ -1166,7 +1166,7 @@ void cw1200_rx_cb(struct cw1200_common *priv, size_t ies_len = skb->len - (ies - (u8 *)(skb->data)); tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies, ies_len); - if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { + if (tim_ie && tim_ie[1] > sizeof(struct ieee80211_tim_ie)) { struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *)&tim_ie[2]; diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h index bd2f6e19c357..4cdc2eb98f16 100644 --- a/include/linux/ieee80211.h +++ b/include/linux/ieee80211.h @@ -961,7 +961,7 @@ struct ieee80211_tim_ie { u8 dtim_period; u8 bitmap_ctrl; /* variable size: 1 - 251 bytes */ - u8 virtual_map[1]; + u8 virtual_map[]; } __packed; /** @@ -4405,7 +4405,7 @@ static inline bool ieee80211_check_tim(const struct ieee80211_tim_ie *tim, u8 mask; u8 index, indexn1, indexn2; - if (unlikely(!tim || tim_len < sizeof(*tim))) + if (unlikely(!tim || tim_len <= sizeof(*tim))) return false; aid &= 0x3fff; diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 8a6917cf63cf..0c23223bb030 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -1123,7 +1123,7 @@ _ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params, elem_parse_failed = true; break; case WLAN_EID_TIM: - if (elen >= sizeof(struct ieee80211_tim_ie)) { + if (elen > sizeof(struct ieee80211_tim_ie)) { elems->tim = (void *)pos; elems->tim_len = elen; } else