From patchwork Mon Sep 13 18:02:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jouni Malinen X-Patchwork-Id: 511468 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 1D73DC433EF for ; Mon, 13 Sep 2021 18:03:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 04C2960EE9 for ; Mon, 13 Sep 2021 18:03:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346294AbhIMSEe (ORCPT ); Mon, 13 Sep 2021 14:04:34 -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 S235491AbhIMSEe (ORCPT ); Mon, 13 Sep 2021 14:04:34 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1631556198; h=Content-Transfer-Encoding: MIME-Version: Message-Id: Date: Subject: Cc: To: From: Sender; bh=6/8CU9vBllQurwHkyrCC6BtyFkriI4uIyyTpPi4eOD4=; b=L7yPPdEVugTE5MZhv5h1XTI4XSyS2sVUFEm5LMBlLJVCL9T8hnu9Y9VfvR82esCSMKdQPsol qFhbOv67uPAr3ZUqDbfznAKkWOxqOPm80CoN3MeDdGb8GCoQVswrD8zz5qz0mBjqla/1y2df OLJeDkzoBy0DqCf5igY0p2VKRaA= 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-n02.prod.us-west-2.postgun.com with SMTP id 613f9253e0f78151d6ce5a19 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Mon, 13 Sep 2021 18:02:59 GMT Sender: jouni=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id A77E3C4360D; Mon, 13 Sep 2021 18:02:59 +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 F13B2C4338F; Mon, 13 Sep 2021 18:02:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 smtp.codeaurora.org F13B2C4338F 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 1/5] ath11k: Change DMA_FROM_DEVICE to DMA_TO_DEVICE when map reinjected packets Date: Mon, 13 Sep 2021 21:02:42 +0300 Message-Id: <20210913180246.193388-1-jouni@codeaurora.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Baochen Qiang For fragmented packets, ath11k reassembles each fragment as a normal packet and then reinjects it into HW ring. In this case, the DMA direction should be DMA_TO_DEVICE, not DMA_FROM_DEVICE, otherwise invalid payload will be reinjected to HW and then delivered to host. What is more, since arbitrary memory could be allocated to the frame, we don't know what kind of data is contained in the buffer reinjected. Thus, as a bad result, private info may be leaked. Note that this issue is only found on Intel platform. Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1 Signed-off-by: Baochen Qiang Signed-off-by: Jouni Malinen --- drivers/net/wireless/ath/ath11k/dp_rx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath11k/dp_rx.c b/drivers/net/wireless/ath/ath11k/dp_rx.c index 90da56316e7e..0c27eead3e02 100644 --- a/drivers/net/wireless/ath/ath11k/dp_rx.c +++ b/drivers/net/wireless/ath/ath11k/dp_rx.c @@ -3434,7 +3434,7 @@ static int ath11k_dp_rx_h_defrag_reo_reinject(struct ath11k *ar, struct dp_rx_ti paddr = dma_map_single(ab->dev, defrag_skb->data, defrag_skb->len + skb_tailroom(defrag_skb), - DMA_FROM_DEVICE); + DMA_TO_DEVICE); if (dma_mapping_error(ab->dev, paddr)) return -ENOMEM;