mac80211: fix issue with possible txq NULL pointer
Drivers that do not have the BUFF_MMPDU_TXQ flag set will not have a
TXQ for the special TID = 16.
In this case, the last member in the *struct ieee80211_sta* txq array
will be NULL.
We must check this in order not to get a NULL pointer dereference when
iterating the txq array.
Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 36a3c2a..ef5d1f6 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -264,6 +264,9 @@
for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
struct ieee80211_txq *txq = sta->sta.txq[i];
+ if (!txq)
+ continue;
+
txqi = to_txq_info(txq);
if (ac != txq->ac)