linux-kernel - [PATCH AUTOSEL 5.4 6/9] net: tipc: fix possible refcount leak in tipc_sk

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Message-Id: <20220706153316.1598554-6-sashal@kernel.org>
Date:   Wed,  6 Jul 2022 11:33:12 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Hangyu Hua <hbh25y@...il.com>,
        Tung Nguyen <tung.q.nguyen@...tech.com.au>,
        "David S . Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>, jmaloy@...hat.com,
        ying.xue@...driver.com, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, netdev@...r.kernel.org,
        tipc-discussion@...ts.sourceforge.net
Subject: [PATCH AUTOSEL 5.4 6/9] net: tipc: fix possible refcount leak in tipc_sk_create()

From: Hangyu Hua <hbh25y@...il.com>

[ Upstream commit 00aff3590fc0a73bddd3b743863c14e76fd35c0c ]

Free sk in case tipc_sk_insert() fails.

Signed-off-by: Hangyu Hua <hbh25y@...il.com>
Reviewed-by: Tung Nguyen <tung.q.nguyen@...tech.com.au>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/tipc/socket.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index d543c4556df2..58c4d61d603f 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -455,6 +455,7 @@ static int tipc_sk_create(struct net *net, struct socket *sock,
 	sock_init_data(sock, sk);
 	tipc_set_sk_state(sk, TIPC_OPEN);
 	if (tipc_sk_insert(tsk)) {
+		sk_free(sk);
 		pr_warn("Socket create failed; port number exhausted\n");
 		return -EINVAL;
 	}
-- 
2.35.1