linux-kernel - [PATCH 5.18 087/339] amt: fix possible memory leak in amt

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Date:   Mon, 13 Jun 2022 12:08:32 +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, Taehee Yoo <ap420073@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.18 087/339] amt: fix possible memory leak in amt_rcv()

From: Taehee Yoo <ap420073@...il.com>

[ Upstream commit 1a1a0e80e005cbdc2c250fc858e1d8570f4e4acb ]

If an amt receives packets and it finds socket.
If it can't find a socket, it should free a received skb.
But it doesn't.
So, a memory leak would possibly occur.

Fixes: cbc21dc1cfe9 ("amt: add data plane of amt interface")
Signed-off-by: Taehee Yoo <ap420073@...il.com>
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/amt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/amt.c b/drivers/net/amt.c
index d376ed89f836..22d7da749a24 100644
--- a/drivers/net/amt.c
+++ b/drivers/net/amt.c
@@ -2679,7 +2679,7 @@ static int amt_rcv(struct sock *sk, struct sk_buff *skb)
 	amt = rcu_dereference_sk_user_data(sk);
 	if (!amt) {
 		err = true;
-		goto out;
+		goto drop;
 	}
 
 	skb->dev = amt->dev;
-- 
2.35.1