linux-kernel - Re: [net PATCH v1 2/2] net: netprio: fd passed in SCM

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Message-ID: <20120814023128.GG23464@ZenIV.linux.org.uk>
Date:	Tue, 14 Aug 2012 03:31:28 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	John Fastabend <john.r.fastabend@...el.com>
Cc:	nhorman@...driver.com, netdev@...r.kernel.org, davem@...emloft.net,
	linux-kernel@...r.kernel.org, joe@...ches.com
Subject: Re: [net PATCH v1 2/2] net: netprio: fd passed in SCM_RIGHTS
 datagram not set correctly

On Mon, Aug 13, 2012 at 06:39:45PM -0700, John Fastabend wrote:
>  		/* Bump the usage count and install the file. */
>  		get_file(fp[i]);
>  		fd_install(new_fd, fp[i]);
> +		sock = sock_from_file(fp[i], &err);
> +		if (sock)
> +			sock->sk->sk_cgrp_prioidx = prioidx;

Better to do that before fd_install() exposes the sucker; it's not
a serious issue, but it's more obviously correct that way.
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