From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH net-next-2.6] netlink: netlink_recvmsg() fix Date: Sun, 25 Jul 2010 21:55:48 -0700 (PDT) Message-ID: <20100725.215548.112589000.davem@davemloft.net> References: <1279699529.3707.5.camel@jlt3.sipsolutions.net> <1279700420.2452.15.camel@edumazet-laptop> <1279701835.2452.17.camel@edumazet-laptop> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: johannes@sipsolutions.net, netdev@vger.kernel.org To: eric.dumazet@gmail.com Return-path: Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:46422 "EHLO sunset.davemloft.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752624Ab0GZEzb (ORCPT ); Mon, 26 Jul 2010 00:55:31 -0400 In-Reply-To: <1279701835.2452.17.camel@edumazet-laptop> Sender: netdev-owner@vger.kernel.org List-ID: From: Eric Dumazet Date: Wed, 21 Jul 2010 10:43:55 +0200 > [PATCH net-next-2.6 v3] netlink: netlink_recvmsg() fix > > commit 1dacc76d0014 > (net/compat/wext: send different messages to compat tasks) > introduced a race condition on netlink, in case MSG_PEEK is used. > > An skb given by skb_recv_datagram() might be shared, we must copy it > before any modification, or risk fatal corruption. > > Signed-off-by: Eric Dumazet Applied, thanks Eric.