FAILED: patch "[PATCH] ath10k: Fix TKIP Michael MIC verification for PCIe" failed to apply to 4.19-stable tree

The patch below does not apply to the 4.19-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 0dc267b13f3a7e8424a898815dd357211b737330 Mon Sep 17 00:00:00 2001
From: Wen Gong <[email protected]>
Date: Tue, 11 May 2021 20:02:56 +0200
Subject: [PATCH] ath10k: Fix TKIP Michael MIC verification for PCIe

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

index 12451ab66a19..87196f9bbdea 100644
@@ -1974,6 +1974,11 @@ static void ath10k_htt_rx_h_mpdu(struct ath10k *ar,
 		}
 
 		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);
 

@@ -1991,6 +1996,11 @@ 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;
 	}
 }