net: fix possible wrong checksum generation
[linux-3.10.git] / drivers / net / virtio_net.c
index 701408a..58914c8 100644 (file)
@@ -220,6 +220,7 @@ static void set_skb_frag(struct sk_buff *skb, struct page *page,
        skb->len += size;
        skb->truesize += PAGE_SIZE;
        skb_shinfo(skb)->nr_frags++;
+       skb_shinfo(skb)->gso_type |= SKB_GSO_SHARED_FRAG;
        *len -= size;
 }
 
@@ -379,16 +380,18 @@ static void receive_buf(struct receive_queue *rq, void *buf, unsigned int len)
                 ntohs(skb->protocol), skb->len, skb->pkt_type);
 
        if (hdr->hdr.gso_type != VIRTIO_NET_HDR_GSO_NONE) {
+               unsigned short gso_type = 0;
+
                pr_debug("GSO!\n");
                switch (hdr->hdr.gso_type & ~VIRTIO_NET_HDR_GSO_ECN) {
                case VIRTIO_NET_HDR_GSO_TCPV4:
-                       skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
+                       gso_type = SKB_GSO_TCPV4;
                        break;
                case VIRTIO_NET_HDR_GSO_UDP:
-                       skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
+                       gso_type = SKB_GSO_UDP;
                        break;
                case VIRTIO_NET_HDR_GSO_TCPV6:
-                       skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
+                       gso_type = SKB_GSO_TCPV6;
                        break;
                default:
                        net_warn_ratelimited("%s: bad gso type %u.\n",
@@ -397,7 +400,7 @@ static void receive_buf(struct receive_queue *rq, void *buf, unsigned int len)
                }
 
                if (hdr->hdr.gso_type & VIRTIO_NET_HDR_GSO_ECN)
-                       skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_ECN;
+                       gso_type |= SKB_GSO_TCP_ECN;
 
                skb_shinfo(skb)->gso_size = hdr->hdr.gso_size;
                if (skb_shinfo(skb)->gso_size == 0) {
@@ -405,6 +408,7 @@ static void receive_buf(struct receive_queue *rq, void *buf, unsigned int len)
                        goto frame_err;
                }
 
+               skb_shinfo(skb)->gso_type |= gso_type;
                /* Header must be checked, and gso_segs computed. */
                skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY;
                skb_shinfo(skb)->gso_segs = 0;