From patchwork Fri Jun 24 19:12:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Felix Fietkau X-Patchwork-Id: 12895024 X-Patchwork-Delegate: nbd@nbd.name 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 5B416C43334 for ; Fri, 24 Jun 2022 19:13:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231268AbiFXTNm (ORCPT ); Fri, 24 Jun 2022 15:13:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43152 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232107AbiFXTNH (ORCPT ); Fri, 24 Jun 2022 15:13:07 -0400 Received: from nbd.name (nbd.name [IPv6:2a01:4f8:221:3d45::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1EF7DB4B1 for ; Fri, 24 Jun 2022 12:13:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=nbd.name; s=20160729; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Sender:Reply-To:Cc:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=Ci4rribwEHxyUcm1miVtwoazSs6ChpHM66/8j+Vi/jM=; b=OJEzeSe7h8WP71MphydWBwkKzT +mcYssrc5KuCakaTqceSbn4jk1yyvfHwuAWr6U9eWAKLUSuqkfKCg5ICrmB3A54tjjTVqCmf/hiik eHroevOPGSFUqfh4AakFqESd+5lA9JS17WGt7o9ekdMmeKm6hntkbnj6Ly2AwkQrcZ4w=; Received: from p200300daa71a4800391046fbc91acf5a.dip0.t-ipconnect.de ([2003:da:a71a:4800:3910:46fb:c91a:cf5a] helo=localhost.localdomain) by ds12 with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.89) (envelope-from ) id 1o4ojm-0002r8-Tv for linux-wireless@vger.kernel.org; Fri, 24 Jun 2022 21:13:02 +0200 From: Felix Fietkau To: linux-wireless@vger.kernel.org Subject: [PATCH 3/4] mt76: allow receiving frames with invalid CCMP PN via monitor interfaces Date: Fri, 24 Jun 2022 21:12:59 +0200 Message-Id: <20220624191300.52766-3-nbd@nbd.name> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220624191300.52766-1-nbd@nbd.name> References: <20220624191300.52766-1-nbd@nbd.name> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org This can be useful for debugging Signed-off-by: Felix Fietkau --- drivers/net/wireless/mediatek/mt76/mac80211.c | 24 ++++++++----------- 1 file changed, 10 insertions(+), 14 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/mac80211.c b/drivers/net/wireless/mediatek/mt76/mac80211.c index ecf5bd9605db..cb41f54bdd1c 100644 --- a/drivers/net/wireless/mediatek/mt76/mac80211.c +++ b/drivers/net/wireless/mediatek/mt76/mac80211.c @@ -1018,7 +1018,7 @@ mt76_rx_convert(struct mt76_dev *dev, struct sk_buff *skb, *hw = mt76_phy_hw(dev, mstat.ext_phy); } -static int +static void mt76_check_ccmp_pn(struct sk_buff *skb) { struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb; @@ -1028,13 +1028,13 @@ mt76_check_ccmp_pn(struct sk_buff *skb) int ret; if (!(status->flag & RX_FLAG_DECRYPTED)) - return 0; + return; if (status->flag & RX_FLAG_ONLY_MONITOR) - return 0; + return; if (!wcid || !wcid->rx_check_pn) - return 0; + return; security_idx = status->qos_ctl & IEEE80211_QOS_CTL_TID_MASK; if (status->flag & RX_FLAG_8023) @@ -1048,7 +1048,7 @@ mt76_check_ccmp_pn(struct sk_buff *skb) */ if (ieee80211_is_frag(hdr) && !ieee80211_is_first_frag(hdr->frame_control)) - return 0; + return; } /* IEEE 802.11-2020, 12.5.3.4.4 "PN and replay detection" c): @@ -1065,15 +1065,15 @@ mt76_check_ccmp_pn(struct sk_buff *skb) BUILD_BUG_ON(sizeof(status->iv) != sizeof(wcid->rx_key_pn[0])); ret = memcmp(status->iv, wcid->rx_key_pn[security_idx], sizeof(status->iv)); - if (ret <= 0) - return -EINVAL; /* replay */ + if (ret <= 0) { + status->flag |= RX_FLAG_ONLY_MONITOR; + return; + } memcpy(wcid->rx_key_pn[security_idx], status->iv, sizeof(status->iv)); if (status->flag & RX_FLAG_IV_STRIPPED) status->flag |= RX_FLAG_PN_VALIDATED; - - return 0; } static void @@ -1246,11 +1246,7 @@ void mt76_rx_complete(struct mt76_dev *dev, struct sk_buff_head *frames, while ((skb = __skb_dequeue(frames)) != NULL) { struct sk_buff *nskb = skb_shinfo(skb)->frag_list; - if (mt76_check_ccmp_pn(skb)) { - dev_kfree_skb(skb); - continue; - } - + mt76_check_ccmp_pn(skb); skb_shinfo(skb)->frag_list = NULL; mt76_rx_convert(dev, skb, &hw, &sta); ieee80211_rx_list(hw, sta, skb, &list);