net: Verify UDP checksum before handoff to encap

Moving validation of UDP checksum to be done in UDP not encap layer.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index f2d05d7..54ea0a3 100644 (file)
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1495,6 +1495,10 @@ int udp_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
                if (skb->len > sizeof(struct udphdr) && encap_rcv != NULL) {
                        int ret;
 
+                       /* Verify checksum before giving to encap */
+                       if (udp_lib_checksum_complete(skb))
+                               goto csum_error;
+
                        ret = encap_rcv(sk, skb);
                        if (ret <= 0) {
                                UDP_INC_STATS_BH(sock_net(sk),

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index fc2be63..7edf096 100644 (file)
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -634,6 +634,10 @@ int udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
                if (skb->len > sizeof(struct udphdr) && encap_rcv != NULL) {
                        int ret;
 
+                       /* Verify checksum before giving to encap */
+                       if (udp_lib_checksum_complete(skb))
+                               goto csum_error;
+
                        ret = encap_rcv(sk, skb);
                        if (ret <= 0) {
                                UDP_INC_STATS_BH(sock_net(sk),