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mt76: mt7615: fix a possible NULL pointer dereference in mt7615_pm_wake_work

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Initialize wcid to global_wcid if msta is NULL in mt7615_pm_wake_work
routine since wcid will be dereferenced running mt76_tx()

Fixes: 2b8cdfb28d340 ("mt76: mt7615: wake device before pushing frames in mt7615_tx")
Signed-off-by: Lorenzo Bianconi <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Lorenzo Bianconi
2020-08-22 21:19:24 +02:00
committed by Felix Fietkau
parent b8780c44c7
commit 37a1c7ed67
1 changed files with 2 additions and 1 deletions
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mt7615/mac.c
+2 -1
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@@ -1865,12 +1865,13 @@ void mt7615_pm_wake_work(struct work_struct *work)
spin_lock_bh(&dev->pm.txq_lock);
for (i = 0; i < IEEE80211_NUM_ACS; i++) {
struct mt7615_sta *msta = dev->pm.tx_q[i].msta;
struct mt76_wcid *wcid = msta ? &msta->wcid : NULL;
struct ieee80211_sta *sta = NULL;
struct mt76_wcid *wcid;
if (!dev->pm.tx_q[i].skb)
continue;
wcid = msta ? &msta->wcid : &dev->mt76.global_wcid;
if (msta && wcid->sta)
sta = container_of((void *)msta, struct ieee80211_sta,
drv_priv);