From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steffen Klassert Subject: [PATCH 3/5] xfrm: Reset encapsulation field of the skb before transformation Date: Thu, 10 Mar 2016 11:24:27 +0100 Message-ID: <1457605469-17332-4-git-send-email-steffen.klassert@secunet.com> References: <1457605469-17332-1-git-send-email-steffen.klassert@secunet.com> Mime-Version: 1.0 Content-Type: text/plain Cc: Herbert Xu , Steffen Klassert , To: David Miller Return-path: Received: from a.mx.secunet.com ([62.96.220.36]:36666 "EHLO a.mx.secunet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935305AbcCJKyP (ORCPT ); Thu, 10 Mar 2016 05:54:15 -0500 In-Reply-To: <1457605469-17332-1-git-send-email-steffen.klassert@secunet.com> Sender: netdev-owner@vger.kernel.org List-ID: The inner headers are invalid after a xfrm transformation. So reset the skb encapsulation field to ensure nobody tries to access the inner headers. Signed-off-by: Steffen Klassert --- net/xfrm/xfrm_output.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c index ff4a91f..637387b 100644 --- a/net/xfrm/xfrm_output.c +++ b/net/xfrm/xfrm_output.c @@ -99,6 +99,9 @@ static int xfrm_output_one(struct sk_buff *skb, int err) skb_dst_force(skb); + /* Inner headers are invalid now. */ + skb->encapsulation = 0; + err = x->type->output(x, skb); if (err == -EINPROGRESS) goto out; -- 1.9.1