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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>
This commit is contained in:
Tom Herbert 2014-05-07 16:52:39 -07:00 committed by David S. Miller
parent 39471ac8dd
commit 0a80966b10
2 changed files with 8 additions and 0 deletions
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4
net/ipv4/udp.c
View File

@ -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) { if (skb->len > sizeof(struct udphdr) && encap_rcv != NULL) {
int ret; int ret;
/* Verify checksum before giving to encap */
if (udp_lib_checksum_complete(skb))
goto csum_error;
ret = encap_rcv(sk, skb); ret = encap_rcv(sk, skb);
if (ret <= 0) { if (ret <= 0) {
UDP_INC_STATS_BH(sock_net(sk), UDP_INC_STATS_BH(sock_net(sk),

4
net/ipv6/udp.c
View File

@ -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) { if (skb->len > sizeof(struct udphdr) && encap_rcv != NULL) {
int ret; int ret;
/* Verify checksum before giving to encap */
if (udp_lib_checksum_complete(skb))
goto csum_error;
ret = encap_rcv(sk, skb); ret = encap_rcv(sk, skb);
if (ret <= 0) { if (ret <= 0) {
UDP_INC_STATS_BH(sock_net(sk), UDP_INC_STATS_BH(sock_net(sk),