Merge tag 'mac80211-for-davem-2016-09-16' of...

Merge tag 'mac80211-for-davem-2016-09-16' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211

Johannes Berg says:

====================
Two more fixes:
 * reject aggregation sessions for TSID/TID 8-16 that we
   can never use anyway and which could confuse drivers
 * check return value of skb_linearize()
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/mac80211/agg-rx.c

@@ -261,10 +261,16 @@ void __ieee80211_start_rx_ba_session(struct sta_info *sta,
 		.timeout = timeout,
 		.ssn = start_seq_num,
 	};
-
 	int i, ret = -EOPNOTSUPP;
 	u16 status = WLAN_STATUS_REQUEST_DECLINED;
 
+	if (tid >= IEEE80211_FIRST_TSPEC_TSID) {
+		ht_dbg(sta->sdata,
+		       "STA %pM requests BA session on unsupported tid %d\n",
+		       sta->sta.addr, tid);
+		goto end_no_lock;
+	}
+
 	if (!sta->sta.ht_cap.ht_supported) {
 		ht_dbg(sta->sdata,
 		       "STA %pM erroneously requests BA session on tid %d w/o QoS\n",

net/mac80211/agg-tx.c

@@ -584,6 +584,9 @@ int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid,
 	    ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW))
 		return -EINVAL;
 
+	if (WARN_ON(tid >= IEEE80211_FIRST_TSPEC_TSID))
+		return -EINVAL;
+
 	ht_dbg(sdata, "Open BA session requested for %pM tid %u\n",
 	       pubsta->addr, tid);
 

net/mac80211/tx.c

@@ -1515,8 +1515,12 @@ struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
 	spin_unlock_bh(&fq->lock);
 
 	if (skb && skb_has_frag_list(skb) &&
-	    !ieee80211_hw_check(&local->hw, TX_FRAG_LIST))
-		skb_linearize(skb);
+	    !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) {
+		if (skb_linearize(skb)) {
+			ieee80211_free_txskb(&local->hw, skb);
+			return NULL;
+		}
+	}
 
 	return skb;
 }