From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sarveshwar Bandi , "David S. Miller" Subject: [ 20/22] bridge: Pull ip header into skb->data before looking into ip header. Date: Tue, 12 Feb 2013 12:37:03 -0800 Message-Id: <20130212203417.361927585@linuxfoundation.org> In-Reply-To: <20130212203413.459836020@linuxfoundation.org> References: <20130212203413.459836020@linuxfoundation.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Sarveshwar Bandi [ Upstream commit 6caab7b0544e83e6c160b5e80f5a4a7dd69545c7 ] If lower layer driver leaves the ip header in the skb fragment, it needs to be first pulled into skb->data before inspecting ip header length or ip version number. Signed-off-by: Sarveshwar Bandi Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/bridge/br_netfilter.c | 3 +++ 1 file changed, 3 insertions(+) --- a/net/bridge/br_netfilter.c +++ b/net/bridge/br_netfilter.c @@ -233,6 +233,9 @@ static int br_parse_ip_options(struct sk struct net_device *dev = skb->dev; u32 len; + if (!pskb_may_pull(skb, sizeof(struct iphdr))) + goto inhdr_error; + iph = ip_hdr(skb); opt = &(IPCB(skb)->opt);