From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jesse Gross Subject: [PATCH net 4/6] openvswitch: Fix parsing invalid LLC/SNAP ethertypes Date: Thu, 14 Mar 2013 17:15:04 -0700 Message-ID: <1363306506-885-5-git-send-email-jesse@nicira.com> References: <1363306506-885-1-git-send-email-jesse@nicira.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: dev-yBygre7rU0TnMu66kgdUjQ@public.gmane.org, netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: David Miller Return-path: In-Reply-To: <1363306506-885-1-git-send-email-jesse-l0M0P4e3n4LQT0dZR+AlfA@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dev-bounces-yBygre7rU0TnMu66kgdUjQ@public.gmane.org Errors-To: dev-bounces-yBygre7rU0TnMu66kgdUjQ@public.gmane.org List-Id: netdev.vger.kernel.org From: Rich Lane Before this patch, if an LLC/SNAP packet with OUI 00:00:00 had an ethertype less than 1536 the flow key given to userspace in the upcall would contain the invalid ethertype (for example, 3). If userspace attempted to insert a kernel flow for this key it would be rejected by ovs_flow_from_nlattrs. This patch allows OVS to pass the OFTest pktact.DirectBadLlcPackets. Signed-off-by: Rich Lane Signed-off-by: Jesse Gross --- net/openvswitch/flow.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c index c3294ce..0c98d40 100644 --- a/net/openvswitch/flow.c +++ b/net/openvswitch/flow.c @@ -484,7 +484,11 @@ static __be16 parse_ethertype(struct sk_buff *skb) return htons(ETH_P_802_2); __skb_pull(skb, sizeof(struct llc_snap_hdr)); - return llc->ethertype; + + if (ntohs(llc->ethertype) >= 1536) + return llc->ethertype; + + return htons(ETH_P_802_2); } static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key, -- 1.7.10.4