From patchwork Mon Sep 13 18:02:43 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jouni Malinen X-Patchwork-Id: 510215 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=-16.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 2B56AC433F5 for ; Mon, 13 Sep 2021 18:03:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1002F60F3A for ; Mon, 13 Sep 2021 18:03:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346222AbhIMSEb (ORCPT ); Mon, 13 Sep 2021 14:04:31 -0400 Received: from so254-9.mailgun.net ([198.61.254.9]:63645 "EHLO so254-9.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346559AbhIMSE2 (ORCPT ); Mon, 13 Sep 2021 14:04:28 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1631556193; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=WrTk85o6jVDyoyJoxKXGeRyBbmUALZxD8Ub4V/fI9HA=; b=jzmujV69AXfMW0EU8CyzPEbHIwAD2XSU396rPZrKn6OlnhDA9BO0XX/esXSh+bn4mgWDVnod 6F1fjSq8vr9MaXjLVrDQt0pBey4QFB2HCCI5uXtI9Bq3EVBkLUevSFuJSg4LKyCwLOiosBzL rAdZ+5uvrg+3xJg9KiWR1cwllKg= X-Mailgun-Sending-Ip: 198.61.254.9 X-Mailgun-Sid: WyI3YTAwOSIsICJsaW51eC13aXJlbGVzc0B2Z2VyLmtlcm5lbC5vcmciLCAiYmU5ZTRhIl0= Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n03.prod.us-west-2.postgun.com with SMTP id 613f9255b585cc7d240f6d85 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Mon, 13 Sep 2021 18:03:01 GMT Sender: jouni=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 984BFC4360C; Mon, 13 Sep 2021 18:03:01 +0000 (UTC) Received: from jouni.codeaurora.org (85-76-72-211-nat.elisa-mobile.fi [85.76.72.211]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: jouni) by smtp.codeaurora.org (Postfix) with ESMTPSA id CDEA1C4360D; Mon, 13 Sep 2021 18:02:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 smtp.codeaurora.org CDEA1C4360D Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=codeaurora.org From: Jouni Malinen To: Kalle Valo Cc: ath11k@lists.infradead.org, linux-wireless@vger.kernel.org, Baochen Qiang , Jouni Malinen Subject: [PATCH 2/5] ath11k: Drop MSDU with length error in DP rx path Date: Mon, 13 Sep 2021 21:02:43 +0300 Message-Id: <20210913180246.193388-2-jouni@codeaurora.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210913180246.193388-1-jouni@codeaurora.org> References: <20210913180246.193388-1-jouni@codeaurora.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Baochen Qiang There are MSDUs whose length are invalid. For example, attackers may inject on purpose truncated A-MSDUs with invalid MSDU length. Such MSDUs are marked with an err bit set in rx attention tlvs, so we can check and drop them. Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1 Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-01720.1-QCAHSPSWPL_V1_V2_SILICONZ_LITE-1 Signed-off-by: Baochen Qiang Signed-off-by: Jouni Malinen --- drivers/net/wireless/ath/ath11k/dp_rx.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/net/wireless/ath/ath11k/dp_rx.c b/drivers/net/wireless/ath/ath11k/dp_rx.c index 0c27eead3e02..c50f70913583 100644 --- a/drivers/net/wireless/ath/ath11k/dp_rx.c +++ b/drivers/net/wireless/ath/ath11k/dp_rx.c @@ -142,6 +142,18 @@ static u32 ath11k_dp_rx_h_attn_mpdu_err(struct rx_attention *attn) return errmap; } +static bool ath11k_dp_rx_h_attn_msdu_len_err(struct ath11k_base *ab, + struct hal_rx_desc *desc) +{ + struct rx_attention *rx_attention; + u32 errmap; + + rx_attention = ath11k_dp_rx_get_attention(ab, desc); + errmap = ath11k_dp_rx_h_attn_mpdu_err(rx_attention); + + return errmap & DP_RX_MPDU_ERR_MSDU_LEN; +} + static u16 ath11k_dp_rx_h_msdu_start_msdu_len(struct ath11k_base *ab, struct hal_rx_desc *desc) { @@ -2525,6 +2537,12 @@ static int ath11k_dp_rx_process_msdu(struct ath11k *ar, } rx_desc = (struct hal_rx_desc *)msdu->data; + if (ath11k_dp_rx_h_attn_msdu_len_err(ab, rx_desc)) { + ath11k_warn(ar->ab, "msdu len not valid\n"); + ret = -EIO; + goto free_out; + } + lrx_desc = (struct hal_rx_desc *)last_buf->data; rx_attention = ath11k_dp_rx_get_attention(ab, lrx_desc); if (!ath11k_dp_rx_h_attn_msdu_done(rx_attention)) {