mac80211: don't build AMSDU from GSO packets

If we build AMSDU from GSO packets, it can lead to
bad results if anyone tries to call skb_gso_segment
on the packets.
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/tx.c

@@ -3218,6 +3218,9 @@ static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
 	if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
 		return false;
 
+	if (skb_is_gso(skb))
+		return false;
+
 	if (!txq)
 		return false;
 
@@ -3242,7 +3245,7 @@ static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
 	tin = &txqi->tin;
 	flow = fq_flow_classify(fq, tin, skb, fq_flow_get_default_func);
 	head = skb_peek_tail(&flow->queue);
-	if (!head)
+	if (!head || skb_is_gso(head))
 		goto out;
 
 	orig_len = head->len;