linux-kernel - [PATCH 5.8 268/464] mt76: mt7663u: fix potential memory leak in mcu message handler

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Date:   Mon, 17 Aug 2020 17:13:41 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Lorenzo Bianconi <lorenzo@...nel.org>,
        Sean Wang <sean.wang@...iatek.com>,
        Felix Fietkau <nbd@....name>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.8 268/464] mt76: mt7663u: fix potential memory leak in mcu message handler

From: Sean Wang <sean.wang@...iatek.com>

[ Upstream commit c876039e95559350ee101d4b6f6084d9803f2995 ]

Fix potential memory leak in mcu message handler on error condition.

Fixes: eb99cc95c3b6 ("mt76: mt7615: introduce mt7663u support")
Acked-by: Lorenzo Bianconi <lorenzo@...nel.org>
Signed-off-by: Sean Wang <sean.wang@...iatek.com>
Signed-off-by: Felix Fietkau <nbd@....name>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/wireless/mediatek/mt76/mt7615/usb_mcu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/usb_mcu.c b/drivers/net/wireless/mediatek/mt76/mt7615/usb_mcu.c
index cd709fd617db2..3e66ff98cab81 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/usb_mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/usb_mcu.c
@@ -34,7 +34,6 @@ mt7663u_mcu_send_message(struct mt76_dev *mdev, struct sk_buff *skb,
 
 	ret = mt76u_bulk_msg(&dev->mt76, skb->data, skb->len, NULL,
 			     1000, ep);
-	dev_kfree_skb(skb);
 	if (ret < 0)
 		goto out;
 
@@ -43,6 +42,7 @@ mt7663u_mcu_send_message(struct mt76_dev *mdev, struct sk_buff *skb,
 
 out:
 	mutex_unlock(&mdev->mcu.mutex);
+	dev_kfree_skb(skb);
 
 	return ret;
 }
-- 
2.25.1