linux-kernel - Re: [PATCH] nfc: free skb buffer using skb_free

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Date:	Mon, 19 Oct 2015 09:44:18 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Insu Yun <wuninsu@...il.com>
Cc:	lauro.venancio@...nbossa.org, aloisio.almeida@...nbossa.org,
	sameo@...ux.intel.com, davem@...emloft.net,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, taesoo@...ech.edu,
	yeongjin.jang@...ech.edu, insu@...ech.edu, changwoo@...ech.edu
Subject: Re: [PATCH] nfc: free skb buffer using skb_free_datagram

On Mon, 2015-10-19 at 15:59 +0000, Insu Yun wrote:
> Freeing sk_buff genereated by skb_recv_datagram is always by
> skb_free_datagram, not kfree_skb.
> 
> Signed-off-by: Insu Yun <wuninsu@...il.com>
> ---
>  net/nfc/llcp_sock.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/net/nfc/llcp_sock.c b/net/nfc/llcp_sock.c
> index b7de0da..15e681f 100644
> --- a/net/nfc/llcp_sock.c
> +++ b/net/nfc/llcp_sock.c
> @@ -870,7 +870,7 @@ static int llcp_sock_recvmsg(struct socket *sock, struct msghdr *msg,
>  			}
>  		}
>  
> -		kfree_skb(skb);
> +		skb_free_datagram(sk, skb);
>  	}
>  
>  	/* XXX Queue backlogged skbs */

Nope, you are adding a bug here.

Current code is fine.


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