netdev - Re: [PATCH] net: fix infinite loop in __skb_recv

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Message-Id: <20130212.160733.2235089567079483883.davem@davemloft.net>
Date:	Tue, 12 Feb 2013 16:07:33 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	tt.rantala@...il.com, netdev@...r.kernel.org, davej@...hat.com,
	xemul@...allels.com
Subject: Re: [PATCH] net: fix infinite loop in __skb_recv_datagram()

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Tue, 12 Feb 2013 08:16:53 -0800

> From: Eric Dumazet <edumazet@...gle.com>
> 
> Tommi was fuzzing with trinity and reported the following problem :
> 
> commit 3f518bf745 (datagram: Add offset argument to __skb_recv_datagram)
> missed that a raw socket receive queue can contain skbs with no payload.
> 
> We can loop in __skb_recv_datagram() with MSG_PEEK mode, because
> wait_for_packet() is not prepared to skip these skbs.
 ...
> Reported-by: Tommi Rantala <tt.rantala@...il.com>
> Tested-by: Tommi Rantala <tt.rantala@...il.com>
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Applied, thanks.
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