From patchwork Mon Jun 19 13:26:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Greenman, Gregory" X-Patchwork-Id: 13284509 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 7077FEB64DC for ; Mon, 19 Jun 2023 13:27:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231910AbjFSN1O (ORCPT ); Mon, 19 Jun 2023 09:27:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34392 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229869AbjFSN1N (ORCPT ); Mon, 19 Jun 2023 09:27:13 -0400 Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5BD9F127 for ; Mon, 19 Jun 2023 06:27:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1687181232; x=1718717232; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=UYwcI5hXKKt6Zlt+1/2aE0pxraW6U7dye9Rm2EfxxDs=; b=H7af1rtkwZrSFA1p6x95dGOpAMwg3hFrm95VHh2QN5eD0aomPF3p40SG 81MQGdu0SHQ5h6HqHgDlWkx48CR1FVTR5lN/Fsqa7dgije3YOyASK9SWq kNUIfFpE2ezeB6+TLopwnuUjrk+WMmu1HKCUCnG9c7ypDXodS8aGKEsIZ CMoI/MIjHr39/AJr7ySDHZ5llkGgvvID7pMABTuuO+xgoZBFEmWOI4zgw z23+L+vr9rijULmTMwt0FcOfD5aP2659kopARD1QccrEdFxW8lzdvpF7v QQYpRkWqH3gsIzBv4GNJJoO3McFjSnA9qHcyA5y/+RaQpMoa8LLgNkfoN Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10746"; a="339240660" X-IronPort-AV: E=Sophos;i="6.00,254,1681196400"; d="scan'208";a="339240660" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Jun 2023 06:27:12 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10746"; a="716871716" X-IronPort-AV: E=Sophos;i="6.00,254,1681196400"; d="scan'208";a="716871716" Received: from aadawii-mobl2.ger.corp.intel.com (HELO ggreenma-mobl2.lan) ([10.214.201.44]) by fmsmga007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Jun 2023 06:27:10 -0700 From: gregory.greenman@intel.com To: johannes@sipsolutions.net Cc: linux-wireless@vger.kernel.org, Johannes Berg , Gregory Greenman Subject: [PATCH 3/9] wifi: mac80211: drop some unprotected action frames Date: Mon, 19 Jun 2023 16:26:47 +0300 Message-Id: <20230619161906.eb4461108129.I3c2223cf29d8a3586dfc74b2dda3f6fa2a4eea7c@changeid> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20230619132653.902084-1-gregory.greenman@intel.com> References: <20230619132653.902084-1-gregory.greenman@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Johannes Berg We should not receive/handle unicast protected dual or public action frames that aren't protected, so drop them - in the latter case of course only if MFP is used. Signed-off-by: Johannes Berg Signed-off-by: Gregory Greenman --- net/mac80211/rx.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 5c1d6c2674ef..04dd714b8730 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -2405,9 +2405,9 @@ static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc) static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) { - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); - __le16 fc = hdr->frame_control; + struct ieee80211_mgmt *mgmt = (void *)rx->skb->data; + __le16 fc = mgmt->frame_control; /* * Pass through unencrypted frames if the hardware has @@ -2416,6 +2416,11 @@ static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) if (status->flag & RX_FLAG_DECRYPTED) return 0; + /* drop unicast protected dual (that wasn't protected) */ + if (ieee80211_is_action(fc) && + mgmt->u.action.category == WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) + return -EACCES; + if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) { if (unlikely(!ieee80211_has_protected(fc) && ieee80211_is_unicast_robust_mgmt_frame(rx->skb))) { @@ -2450,6 +2455,12 @@ static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) if (unlikely(ieee80211_is_action(fc) && !rx->key && ieee80211_is_robust_mgmt_frame(rx->skb))) return -EACCES; + + /* drop unicast public action frames when using MPF */ + if (is_unicast_ether_addr(mgmt->da) && + ieee80211_is_public_action((void *)rx->skb->data, + rx->skb->len)) + return -EACCES; } return 0;