[PATCH 5.8 272/464] mt76: mt7615: fix possible memory leak in mt7615_mcu_wtbl_sta_add

[Greg Kroah-Hartman]

From: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>

[ Upstream commit 2bccc8415883c1cd5ae8836548d9783dbbd84999 ]

Free the second mcu skb if __mt76_mcu_skb_send_msg() fails to transmit
the first one in mt7615_mcu_wtbl_sta_add().

Fixes: 99c457d902cf9 ("mt76: mt7615: move mt7615_mcu_set_bmc to mt7615_mcu_ops")
Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/net/wireless/mediatek/mt76/mt7615/mcu.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c
index d8c52ffcf0ecb..cb8c1d80ead92 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c
@@ -1209,8 +1209,12 @@ mt7615_mcu_wtbl_sta_add(struct mt7615_dev *dev, struct ieee80211_vif *vif,
 	skb = enable ? wskb : sskb;
 
 	err = __mt76_mcu_skb_send_msg(&dev->mt76, skb, cmd, true);
-	if (err < 0)
+	if (err < 0) {
+		skb = enable ? sskb : wskb;
+		dev_kfree_skb(skb);
+
 		return err;
+	}
 
 	cmd = enable ? MCU_EXT_CMD_STA_REC_UPDATE : MCU_EXT_CMD_WTBL_UPDATE;
 	skb = enable ? sskb : wskb;
-- 
2.25.1