net: core: don't account for udp header size when computing seglen

[firefly-linux-kernel-4.4.55.git] / net / core / skbuff.c

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 30c7d35dd862a090c691732af63af1e8fdbad41a..57e225c8914e2f64babae44ecb73628d5fedb4eb 100644 (file)
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -3937,12 +3937,14 @@ EXPORT_SYMBOL_GPL(skb_scrub_packet);
 unsigned int skb_gso_transport_seglen(const struct sk_buff *skb)
 {
        const struct skb_shared_info *shinfo = skb_shinfo(skb);
-       unsigned int hdr_len;
 
        if (likely(shinfo->gso_type & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6)))
-               hdr_len = tcp_hdrlen(skb);
-       else
-               hdr_len = sizeof(struct udphdr);
-       return hdr_len + shinfo->gso_size;
+               return tcp_hdrlen(skb) + shinfo->gso_size;
+
+       /* UFO sets gso_size to the size of the fragmentation
+        * payload, i.e. the size of the L4 (UDP) header is already
+        * accounted for.
+        */
+       return shinfo->gso_size;
 }
 EXPORT_SYMBOL_GPL(skb_gso_transport_seglen);