[26/28] wifi: mac80211: agg-rx: avoid band check

Commit Message

Johannes Berg Oct. 5, 2022, 1 p.m. UTC

From: Johannes Berg <[e-mail]>

If the deflink of the station is on 6 GHz, then it won't have HT.
If at the same time we're using MLO, then vif.bss_conf isn't used,
and thus vif.bss_conf.chandef.chan is NULL, causing the code to
crash.

Fix this by just checking for both HT and HE, and refusing the
aggregation session if both are not present. This might be a bit
wrong since it would accept an aggregation session from a peer
that has HE but no HT on 2.4 or 5 GHz, but such a peer shouldn't
exist in the first place, and it probably supports aggregation if
it has HE support.

Signed-off-by: Johannes Berg <[e-mail]>
---
 net/mac80211/agg-rx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

diff --git a/net/mac80211/agg-rx.c b/net/mac80211/agg-rx.c
index f8bec5ee5b44..bd41022f4894 100644
--- a/net/mac80211/agg-rx.c
+++ b/net/mac80211/agg-rx.c
@@ -297,7 +297,7 @@  void ___ieee80211_start_rx_ba_session(struct sta_info *sta,
 	}
 
 	if (!sta->sta.deflink.ht_cap.ht_supported &&
-	    sta->sdata->vif.bss_conf.chandef.chan->band != NL80211_BAND_6GHZ) {
+	    !sta->sta.deflink.he_cap.has_he) {
 		ht_dbg(sta->sdata,
 		       "STA %pM erroneously requests BA session on tid %d w/o HT\n",
 		       sta->sta.addr, tid);