From: Felix Fietkau <nbd@nbd.name>
Date: Fri, 24 Jul 2020 14:13:10 +0000 (+0200)
Subject: mt76: mt7915: fix crash on tx rate report for invalid stations
X-Git-Tag: v5.10.7~1401^2~150^2~2^2~72
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c12b7c7944e56e526c0a457282603ebcdd04ca90;p=platform%2Fkernel%2Flinux-rpi.git

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 67ac33b..f8f715b 100644
--- 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;