linux-kernel - Re: [PATCH v3 2/3] unix/dgram: fix peeking with an offset larger than data in queue

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Message-ID: <1367282994.8964.335.camel@edumazet-glaptop>
Date:	Mon, 29 Apr 2013 17:49:54 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Benjamin Poirier <bpoirier@...e.de>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Pavel Emelyanov <xemul@...allels.com>,
	Cong Wang <xiyou.wangcong@...il.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/3] unix/dgram: fix peeking with an offset larger
 than data in queue

On Mon, 2013-04-29 at 17:42 -0400, Benjamin Poirier wrote:
> Currently, peeking on a unix datagram socket with an offset larger than len of
> the data in the sk receive queue returns immediately with bogus data. That's
> because *off is not reset between each skb_queue_walk().
> 
> This patch fixes this so that the behavior is the same as peeking with no
> offset on an empty queue: the caller blocks.
> 
> Signed-off-by: Benjamin Poirier <bpoirier@...e.de>
> 
> ---
> 
> v2: address review feedback from Eric Dumazet
> 
> v3: address review feedback from Cong Wang
> 
>  net/core/datagram.c |   21 +++++++++++++--------
>  1 file changed, 13 insertions(+), 8 deletions(-)

Acked-by: Eric Dumazet <edumazet@...gle.com>


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