From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH] net: fix infinite loop in __skb_recv_datagram() Date: Tue, 12 Feb 2013 16:07:33 -0500 (EST) Message-ID: <20130212.160733.2235089567079483883.davem@davemloft.net> References: <1360638903.20362.32.camel@edumazet-glaptop> <1360685813.13993.12.camel@edumazet-glaptop> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: tt.rantala@gmail.com, netdev@vger.kernel.org, davej@redhat.com, xemul@parallels.com To: eric.dumazet@gmail.com Return-path: Received: from shards.monkeyblade.net ([149.20.54.216]:56894 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753195Ab3BLVHf (ORCPT ); Tue, 12 Feb 2013 16:07:35 -0500 In-Reply-To: <1360685813.13993.12.camel@edumazet-glaptop> Sender: netdev-owner@vger.kernel.org List-ID: From: Eric Dumazet Date: Tue, 12 Feb 2013 08:16:53 -0800 > From: Eric Dumazet > > 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 > Tested-by: Tommi Rantala > Signed-off-by: Eric Dumazet Applied, thanks.