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ath10k: drop fragments with multicast DA for SDIO 

Fragmentation is not used with multicast frames. Discard unexpected
fragments with multicast DA. This fixes CVE-2020-26145.

Tested-on: QCA6174 hw3.2 SDIO WLAN.RMH.4.4.1-00049

Cc: stable@vger.kernel.org
Signed-off-by: Wen Gong <wgong@codeaurora.org>
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
Link: https://lore.kernel.org/r/20210511200110.9ca6ca7945a9.I1e18b514590af17c155bda86699bc3a971a8dcf4@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Wen Gong 2021-05-11 20:02:54 +02:00 committed by Johannes Berg
parent 65c415a144
commit 40e7462dad
1 changed files with 7 additions and 2 deletions
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9
drivers/net/wireless/ath/ath10k/htt_rx.c
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@ -2617,6 +2617,13 @@ static bool ath10k_htt_rx_proc_rx_frag_ind_hl(struct ath10k_htt *htt,
rx_desc = (struct htt_hl_rx_desc *)(skb->data + tot_hdr_len);
rx_desc_info = __le32_to_cpu(rx_desc->info);
hdr = (struct ieee80211_hdr *)((u8 *)rx_desc + rx_hl->fw_desc.len);
if (is_multicast_ether_addr(hdr->addr1)) {
/* Discard the fragment with multicast DA */
goto err;
}
if (!MS(rx_desc_info, HTT_RX_DESC_HL_INFO_ENCRYPTED)) {
spin_unlock_bh(&ar->data_lock);
return ath10k_htt_rx_proc_rx_ind_hl(htt, &resp->rx_ind_hl, skb,
@ -2624,8 +2631,6 @@ static bool ath10k_htt_rx_proc_rx_frag_ind_hl(struct ath10k_htt *htt,
HTT_RX_NON_TKIP_MIC);
}
hdr = (struct ieee80211_hdr *)((u8 *)rx_desc + rx_hl->fw_desc.len);
if (ieee80211_has_retry(hdr->frame_control))
goto err;