linux-kernel - Re: [PATCH] tun: avoid owner checks on IFF_ATTACH

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Message-ID: <20130110115503.GD30885@stefanha-thinkpad.redhat.com>
Date:	Thu, 10 Jan 2013 12:55:03 +0100
From:	Stefan Hajnoczi <stefanha@...hat.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	Jason Wang <jasowang@...hat.com>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tun: avoid owner checks on IFF_ATTACH_QUEUE

On Thu, Jan 10, 2013 at 01:31:08PM +0200, Michael S. Tsirkin wrote:
> At the moment, we check owner when we enable queue in tun.
> This seems redundant and will break some valid uses
> where fd is passed around: I think TUNSETOWNER is there
> to prevent others from attaching to a persistent device not
> owned by them. Here the fd is already attached,
> enabling/disabling queue is more like read/write.
> 
> Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> 
> ---
> 
> Note: this is unrelated to Stefan's bugfix.

This should go into 3.8-rc.

Reviewed-by: Stefan Hajnoczi <stefanha@...hat.com>
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