linux-kernel - [PATCH v4.19.y] ath10k: Fix TKIP Michael MIC verification for PCIe

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Message-Id: <1690971733-22270-1-git-send-email-kashwindayan@vmware.com>
Date:   Wed,  2 Aug 2023 15:52:13 +0530
From:   Ashwin Dayanand Kamat <kashwindayan@...are.com>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Wen Gong <wgong@...eaurora.org>,
        Jouni Malinen <jouni@...eaurora.org>,
        Johannes Berg <johannes.berg@...el.com>, davem@...emloft.net,
        ath10k@...ts.infradead.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, akaher@...are.com, vsirnapalli@...are.com,
        tkundu@...are.com, namit@...are.com
Subject: [PATCH v4.19.y] ath10k: Fix TKIP Michael MIC verification for PCIe

From: Wen Gong <wgong@...eaurora.org>

commit 0dc267b13f3a7e8424a898815dd357211b737330 upstream.

TKIP Michael MIC was not verified properly for PCIe cases since the
validation steps in ieee80211_rx_h_michael_mic_verify() in mac80211 did
not get fully executed due to unexpected flag values in
ieee80211_rx_status.

Fix this by setting the flags property to meet mac80211 expectations for
performing Michael MIC validation there. This fixes CVE-2020-26141. It
does the same as ath10k_htt_rx_proc_rx_ind_hl() for SDIO which passed
MIC verification case. This applies only to QCA6174/QCA9377 PCIe.

Tested-on: QCA6174 hw3.2 PCI WLAN.RM.4.4.1-00110-QCARMSWP-1

Cc: stable@...r.kernel.org
Signed-off-by: Wen Gong <wgong@...eaurora.org>
Signed-off-by: Jouni Malinen <jouni@...eaurora.org>
Link: https://lore.kernel.org/r/20210511200110.c3f1d42c6746.I795593fcaae941c471425b8c7d5f7bb185d29142@changeid
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Ashwin Dayanand Kamat <kashwindayan@...are.com>
---
 drivers/net/wireless/ath/ath10k/htt_rx.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c
index 0a7551dc0f94..b8bba6d99dba 100644
--- a/drivers/net/wireless/ath/ath10k/htt_rx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_rx.c
@@ -1645,6 +1645,11 @@ static void ath10k_htt_rx_h_mpdu(struct ath10k *ar,
 
 	skb_queue_walk(amsdu, msdu) {
 		ath10k_htt_rx_h_csum_offload(msdu);
+
+		if (frag && !fill_crypt_header &&
+		    enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA)
+			status->flag &= ~RX_FLAG_MMIC_STRIPPED;
+
 		ath10k_htt_rx_h_undecap(ar, msdu, status, first_hdr, enctype,
 					is_decrypted);
 
@@ -1662,6 +1667,11 @@ static void ath10k_htt_rx_h_mpdu(struct ath10k *ar,
 
 		hdr = (void *)msdu->data;
 		hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
+
+		if (frag && !fill_crypt_header &&
+		    enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA)
+			status->flag &= ~RX_FLAG_IV_STRIPPED &
+					~RX_FLAG_MMIC_STRIPPED;
 	}
 }
 
-- 
2.35.6