ipv6: the entire IPv6 header chain must fit the first fragment

[mirror_ubuntu-bionic-kernel.git] / net / ipv6 / ip6_checksum.c

diff --git a/net/ipv6/ip6_checksum.c b/net/ipv6/ip6_checksum.c
index ec43d18b5ff91f360869fd348a23a23633cc8e33..547515e8450a1aae48f51a331353d04465a31fa0 100644 (file)
--- a/net/ipv6/ip6_checksum.c
+++ b/net/ipv6/ip6_checksum.c
@@ -73,6 +73,11 @@ int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, int proto)
                err = udplite_checksum_init(skb, uh);
                if (err)
                        return err;
+
+               if (UDP_SKB_CB(skb)->partial_cov) {
+                       skb->csum = ip6_compute_pseudo(skb, proto);
+                       return 0;
+               }
        }
 
        /* To support RFC 6936 (allow zero checksum in UDP/IPV6 for tunnels)