| Message ID | a3ffc514ddd9655852674aed228c05d648ac5cc2.1598004511.git.lorenzo@kernel.org |
|---|---|
| State | New |
| Headers | show |
| Series | mt76: mt7615: fix a possible NULL pointer dereference in mt7615_pm_wake_work | expand |
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c index e3663c7c374f..e4aeba17da67 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c @@ -1857,12 +1857,13 @@ 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);
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 <lorenzo@kernel.org> --- drivers/net/wireless/mediatek/mt76/mt7615/mac.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)