linux-kernel - RE: [PATCH] net: tipc: fix possible refcount leak in tipc_sk

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Message-ID: <DB9PR05MB9078334A4067BF8F84DF60D488BB9@DB9PR05MB9078.eurprd05.prod.outlook.com>
Date:   Wed, 29 Jun 2022 03:49:48 +0000
From:   Tung Quang Nguyen <tung.q.nguyen@...tech.com.au>
To:     Hangyu Hua <hbh25y@...il.com>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "tipc-discussion@...ts.sourceforge.net" 
        <tipc-discussion@...ts.sourceforge.net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "jmaloy@...hat.com" <jmaloy@...hat.com>,
        "ying.xue@...driver.com" <ying.xue@...driver.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "edumazet@...gle.com" <edumazet@...gle.com>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "pabeni@...hat.com" <pabeni@...hat.com>,
        "tgraf@...g.ch" <tgraf@...g.ch>
Subject: RE: [PATCH] net: tipc: fix possible refcount leak in tipc_sk_create()

> sk need to be free when tipc_sk_insert fails. While tipc_sk_insert is hard
> to fail, it's better to fix this.
Incorrect English grammar. You should use a simple comment in changelog, for example: "Free sk in case tipc_sk_insert() fails."
> 
> Fixes: 07f6c4bc048a ("tipc: convert tipc reference table to use generic rhashtable")
> Signed-off-by: Hangyu Hua <hbh25y@...il.com>
> ---
>  net/tipc/socket.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/net/tipc/socket.c b/net/tipc/socket.c
> index 17f8c523e33b..43509c7e90fc 100644
> --- a/net/tipc/socket.c
> +++ b/net/tipc/socket.c
> @@ -502,6 +502,7 @@ 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;
>  	}
> --
> 2.25.1