netdev - Re: [PATCH net] tcp: fix crashes in do_tcp

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Date:	Sat, 01 Dec 2012 17:43:02 -0800
From:	Joe Perches <joe@...ches.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Willy Tarreau <w@....eu>, David Miller <davem@...emloft.net>,
	netdev@...r.kernel.org
Subject: Re: [PATCH net] tcp: fix crashes in do_tcp_sendpages()

On Sat, 2012-12-01 at 15:07 -0800, Eric Dumazet wrote:
> From: Eric Dumazet <edumazet@...gle.com>
> 
> Recent network changes allowed high order pages being used
> for skb fragments.
> 
> This uncovered a bug in do_tcp_sendpages() which was assuming its caller
> provided an array of order-0 page pointers.
> 
> We only have to deal with a single page in this function, and its order
> is irrelevant.
[]
> diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
[]
> @@ -830,8 +830,8 @@ static int tcp_send_mss(struct sock *sk, int *size_goal, int flags)
>  	return mss_now;
>  }
>  
> -static ssize_t do_tcp_sendpages(struct sock *sk, struct page **pages, int poffset,
> -			 size_t psize, int flags)
> +static ssize_t do_tcp_sendpages(struct sock *sk, struct page *page, int offset,
> +				size_t size, int flags)

Shouldn't this now be named do_tcp_sendpage ?


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