netdev - Re: [PATCH] net: fix kernel

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Date:	Thu, 4 Oct 2007 14:57:33 -0700 (PDT)
From:	James Morris <jmorris@...ei.org>
To:	Tony Battersby <tonyb@...ernetics.com>
cc:	netdev@...r.kernel.org, davem@...emloft.net
Subject: Re: [PATCH] net: fix kernel_accept() error path

On Thu, 4 Oct 2007, Tony Battersby wrote:

> If accept() returns an error, kernel_accept() releases the new socket
> but passes a pointer to the released socket back to the caller.  Make it
> pass back NULL instead.
> 
> Signed-off-by: Tony Battersby <tonyb@...ernetics.com>
> ---
> --- linux-2.6.23-rc9/net/socket.c.bak	2007-10-04 15:21:17.000000000 -0400
> +++ linux-2.6.23-rc9/net/socket.c	2007-10-04 15:21:22.000000000 -0400
> @@ -2230,6 +2230,7 @@ int kernel_accept(struct socket *sock, s
>  	err = sock->ops->accept(sock, *newsock, flags);
>  	if (err < 0) {
>  		sock_release(*newsock);
> +		*newsock = NULL;
>  		goto done;
>  	}
>  

If you get an error back from kernel_accept, you should not be trying to 
use newsock.

-- 
James Morris
<jmorris@...ei.org>
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