From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Gustavo A. R. Silva" Subject: [PATCH] net: openvswitch: datapath: fix data type in queue_gso_packets Date: Sat, 25 Nov 2017 13:14:40 -0600 Message-ID: <20171125191440.GA30194@embeddedor.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: netdev@vger.kernel.org, dev@openvswitch.org, linux-kernel@vger.kernel.org, "Gustavo A. R. Silva" To: Pravin Shelar , "David S. Miller" , Willem de Bruijn Return-path: Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org gso_type is being used in binary AND operations together with SKB_GSO_UDP. The issue is that variable gso_type is of type unsigned short and SKB_GSO_UDP expands to more than 16 bits: SKB_GSO_UDP = 1 << 16 this makes any binary AND operation between gso_type and SKB_GSO_UDP to be always zero, hence making some code unreachable and likely causing undesired behavior. Fix this by changing the data type of variable gso_type to unsigned int. Addresses-Coverity-ID: 1462223 Fixes: 0c19f846d582 ("net: accept UFO datagrams from tuntap and packet") Signed-off-by: Gustavo A. R. Silva --- net/openvswitch/datapath.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c index 99cfafc..ef38e5a 100644 --- a/net/openvswitch/datapath.c +++ b/net/openvswitch/datapath.c @@ -308,7 +308,7 @@ static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, const struct dp_upcall_info *upcall_info, uint32_t cutlen) { - unsigned short gso_type = skb_shinfo(skb)->gso_type; + unsigned int gso_type = skb_shinfo(skb)->gso_type; struct sw_flow_key later_key; struct sk_buff *segs, *nskb; int err; -- 2.7.4