linux-kernel - [PATCH net] net: ethernet: rtsn: fix potential memory leak in rtsn_start

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Message-ID: <20241014144250.38802-1-wanghai38@huawei.com>
Date: Mon, 14 Oct 2024 22:42:50 +0800
From: Wang Hai <wanghai38@...wei.com>
To: <niklas.soderlund@...natech.se>, <davem@...emloft.net>,
	<edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
	<andrew@...n.ch>, <zhangxiaoxu5@...wei.com>
CC: <netdev@...r.kernel.org>, <linux-renesas-soc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <wanghai38@...wei.com>
Subject: [PATCH net] net: ethernet: rtsn: fix potential memory leak in rtsn_start_xmit()

The rtsn_start_xmit() returns NETDEV_TX_OK without freeing skb
in case of skb->len being too long, add dev_kfree_skb_any() to fix it.

Fixes: b0d3969d2b4d ("net: ethernet: rtsn: Add support for Renesas Ethernet-TSN")
Signed-off-by: Wang Hai <wanghai38@...wei.com>
---
 drivers/net/ethernet/renesas/rtsn.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/renesas/rtsn.c b/drivers/net/ethernet/renesas/rtsn.c
index f9f63c61d792..6b3f7fca8d15 100644
--- a/drivers/net/ethernet/renesas/rtsn.c
+++ b/drivers/net/ethernet/renesas/rtsn.c
@@ -1057,6 +1057,7 @@ static netdev_tx_t rtsn_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 	if (skb->len >= TX_DS) {
 		priv->stats.tx_dropped++;
 		priv->stats.tx_errors++;
+		dev_kfree_skb_any(skb);
 		goto out;
 	}
 
-- 
2.17.1