mt76: mt7915: fix crash on tx rate report for invalid stations

Check wcid RCU pointer before using it

Signed-off-by: Felix Fietkau <nbd@nbd.name>

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
index 67ac33bc495172f3755daff91d50da924ce9b68d..f8f715b30c0bbcd82a38816364e2a67d7a328687 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
@@ -522,6 +522,9 @@ mt7915_mcu_tx_rate_report(struct mt7915_dev *dev, struct sk_buff *skb)
                return;
 
        wcid = rcu_dereference(dev->mt76.wcid[wcidx]);
+       if (!wcid)
+               return;
+
        msta = container_of(wcid, struct mt7915_sta, wcid);
        stats = &msta->stats;