X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fdpif-netdev.c;h=c17b52572ebd70eb19ecf5139de0fda88fe0f450;hb=ba18611;hp=3c22e6dc1b72dc1af770a5b007ce523c78ae9d50;hpb=abfec865566e6cce961cc8660de1ddfdc85dae5f;p=openvswitch

diff --git a/lib/dpif-netdev.c b/lib/dpif-netdev.c
index 3c22e6dc..c17b5257 100644
--- a/lib/dpif-netdev.c
+++ b/lib/dpif-netdev.c
@@ -1017,6 +1017,9 @@ dp_netdev_port_input(struct dp_netdev *dp, struct dp_netdev_port *port,
     struct dp_netdev_flow *flow;
     flow_t key;
 
+    if (packet->size < ETH_HEADER_LEN) {
+        return;
+    }
     if (flow_extract(packet, 0, port->port_no, &key) && dp->drop_frags) {
         dp->n_frags++;
         return;
@@ -1087,12 +1090,14 @@ dp_netdev_wait(void)
  * bits outside of 'mask'.
  */
 static void
-dp_netdev_modify_vlan_tci(struct ofpbuf *packet, const flow_t *key,
-                          uint16_t tci, uint16_t mask)
+dp_netdev_modify_vlan_tci(struct ofpbuf *packet, uint16_t tci, uint16_t mask)
 {
     struct vlan_eth_header *veh;
+    struct eth_header *eh;
 
-    if (key->dl_vlan != htons(ODP_VLAN_NONE)) {
+    eh = packet->l2;
+    if (packet->size >= sizeof(struct vlan_eth_header)
+        && eh->eth_type == htons(ETH_TYPE_VLAN)) {
         /* Clear 'mask' bits, but maintain other TCI bits. */
         veh = packet->l2;
         veh->veth_tci &= ~htons(mask);
@@ -1117,7 +1122,8 @@ static void
 dp_netdev_strip_vlan(struct ofpbuf *packet)
 {
     struct vlan_eth_header *veh = packet->l2;
-    if (veh->veth_type == htons(ETH_TYPE_VLAN)) {
+    if (packet->size >= sizeof *veh
+        && veh->veth_type == htons(ETH_TYPE_VLAN)) {
         struct eth_header tmp;
 
         memcpy(tmp.eth_dst, veh->veth_dst, ETH_ADDR_LEN);
@@ -1288,14 +1294,14 @@ dp_netdev_execute_actions(struct dp_netdev *dp,
 			break;
 
 		case ODPAT_SET_VLAN_VID:
-			dp_netdev_modify_vlan_tci(packet, key, ntohs(a->vlan_vid.vlan_vid),
+			dp_netdev_modify_vlan_tci(packet, ntohs(a->vlan_vid.vlan_vid),
                                       VLAN_VID_MASK);
             break;
 
 		case ODPAT_SET_VLAN_PCP:
-			dp_netdev_modify_vlan_tci(
-                packet, key, a->vlan_pcp.vlan_pcp << VLAN_PCP_SHIFT,
-                VLAN_PCP_MASK);
+			dp_netdev_modify_vlan_tci(packet,
+                                      a->vlan_pcp.vlan_pcp << VLAN_PCP_SHIFT,
+                                      VLAN_PCP_MASK);
             break;
 
 		case ODPAT_STRIP_VLAN: