From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f196.google.com ([209.85.192.196]:46434 "EHLO mail-pf0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751193AbeCIPfS (ORCPT ); Fri, 9 Mar 2018 10:35:18 -0500 Received: by mail-pf0-f196.google.com with SMTP id z10so1401115pfh.13 for ; Fri, 09 Mar 2018 07:35:18 -0800 (PST) Received: from sc9-mailhost3.vmware.com ([24.5.191.4]) by smtp.gmail.com with ESMTPSA id q20sm3283443pgc.84.2018.03.09.07.35.13 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 09 Mar 2018 07:35:13 -0800 (PST) From: William Tu To: netdev@vger.kernel.org Subject: [PATCH net 3/3] ip6erspan: make sure enough headroom at xmit. Date: Fri, 9 Mar 2018 07:34:42 -0800 Message-Id: <1520609682-101077-4-git-send-email-u9012063@gmail.com> In-Reply-To: <1520609682-101077-1-git-send-email-u9012063@gmail.com> References: <1520609682-101077-1-git-send-email-u9012063@gmail.com> Sender: netdev-owner@vger.kernel.org List-ID: The patch adds skb_cow_header() to ensure enough headroom at ip6erspan_tunnel_xmit before pushing the erspan header to the skb. Signed-off-by: William Tu --- net/ipv6/ip6_gre.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c index 4ab476d3a46e..9a759bbbd8a6 100644 --- a/net/ipv6/ip6_gre.c +++ b/net/ipv6/ip6_gre.c @@ -906,6 +906,9 @@ static netdev_tx_t ip6erspan_tunnel_xmit(struct sk_buff *skb, truncate = true; } + if (skb_cow_head(skb, dev->needed_headroom)) + goto tx_err; + t->parms.o_flags &= ~TUNNEL_KEY; IPCB(skb)->flags = 0; -- 2.7.4