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Subject[PATCH AUTOSEL 5.16 113/217] ath10k: drop beacon and probe response which leak from other channel
Date
From: Wen Gong <quic_wgong@quicinc.com>

[ Upstream commit 3bf2537ec2e33310b431b53fd84be8833736c256 ]

When scan request on channel 1, it also receive beacon from other
channels, and the beacon also indicate to mac80211 and wpa_supplicant,
and then the bss info appears in radio measurement report of radio
measurement sent from wpa_supplicant, thus lead RRM case fail.

This is to drop the beacon and probe response which is not the same
channel of scanning.

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

Signed-off-by: Wen Gong <quic_wgong@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20211208061752.16564-1-quic_wgong@quicinc.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/ath/ath10k/wmi.c | 27 ++++++++++++++++++++++++++-
1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c
index 7c1c2658cb5f8..4733fd7fb169e 100644
--- a/drivers/net/wireless/ath/ath10k/wmi.c
+++ b/drivers/net/wireless/ath/ath10k/wmi.c
@@ -2611,9 +2611,30 @@ int ath10k_wmi_event_mgmt_rx(struct ath10k *ar, struct sk_buff *skb)
ath10k_mac_handle_beacon(ar, skb);

if (ieee80211_is_beacon(hdr->frame_control) ||
- ieee80211_is_probe_resp(hdr->frame_control))
+ ieee80211_is_probe_resp(hdr->frame_control)) {
+ struct ieee80211_mgmt *mgmt = (void *)skb->data;
+ u8 *ies;
+ int ies_ch;
+
status->boottime_ns = ktime_get_boottime_ns();

+ if (!ar->scan_channel)
+ goto drop;
+
+ ies = mgmt->u.beacon.variable;
+
+ ies_ch = cfg80211_get_ies_channel_number(mgmt->u.beacon.variable,
+ skb_tail_pointer(skb) - ies,
+ sband->band);
+
+ if (ies_ch > 0 && ies_ch != channel) {
+ ath10k_dbg(ar, ATH10K_DBG_MGMT,
+ "channel mismatched ds channel %d scan channel %d\n",
+ ies_ch, channel);
+ goto drop;
+ }
+ }
+
ath10k_dbg(ar, ATH10K_DBG_MGMT,
"event mgmt rx skb %pK len %d ftype %02x stype %02x\n",
skb, skb->len,
@@ -2627,6 +2648,10 @@ int ath10k_wmi_event_mgmt_rx(struct ath10k *ar, struct sk_buff *skb)
ieee80211_rx_ni(ar->hw, skb);

return 0;
+
+drop:
+ dev_kfree_skb(skb);
+ return 0;
}

static int freq_to_idx(struct ath10k *ar, int freq)
--
2.34.1
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