From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: gro: Reset dev pointer on reuse Date: Sat, 29 Jan 2011 20:45:11 -0800 (PST) Message-ID: <20110129.204511.71113208.davem@davemloft.net> References: <20110130041047.GA6290@gondor.apana.org.au> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org To: herbert@gondor.apana.org.au Return-path: Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:34061 "EHLO sunset.davemloft.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752522Ab1A3Eog (ORCPT ); Sat, 29 Jan 2011 23:44:36 -0500 In-Reply-To: <20110130041047.GA6290@gondor.apana.org.au> Sender: netdev-owner@vger.kernel.org List-ID: From: Herbert Xu Date: Sun, 30 Jan 2011 15:10:47 +1100 > gro: Reset dev pointer on reuse > > On older kernels the VLAN code may zero skb->dev before dropping > it and causing it to be reused by GRO. > > Unfortunately we didn't reset skb->dev in that case which causes > the next GRO user to get a bogus skb->dev pointer. > > This particular problem no longer happens with the current upstream > kernel due to changes in VLAN processing. > > However, for correctness we should still reset the skb->dev pointer > in the GRO reuse function in case a future user does the same thing. > > Signed-off-by: Herbert Xu Applied, thanks Herbert.