diff options
| author |   Simon Horman <horms@verge.net.au> | 2013-05-28 20:34:25 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2013-05-28 23:49:07 -0700 |
| commit | ced14f6804a979d1972415bc23f2f8ddb18595dd (patch) | |
| tree | 4a1acce32c9d4dd88afaba37841461bb36be9c4d /include/net/inet_ecn.h | |
| parent | cxgb3: Correct comparisons and calculations using skb->tail and skb-transport_header (diff) | |
| download | wireguard-linux-ced14f6804a979d1972415bc23f2f8ddb18595dd.tar.xz wireguard-linux-ced14f6804a979d1972415bc23f2f8ddb18595dd.zip | |
net: Correct comparisons and calculations using skb->tail and skb-transport_header
This corrects an regression introduced by "net: Use 16bits for *_headers
fields of struct skbuff" when NET_SKBUFF_DATA_USES_OFFSET is not set. In
that case skb->tail will be a pointer whereas skb->transport_header
will be an offset from head. This is corrected by using wrappers that
ensure that comparisons and calculations are always made using pointers.
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/inet_ecn.h')
| -rw-r--r-- | include/net/inet_ecn.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/include/net/inet_ecn.h b/include/net/inet_ecn.h index aab73757bc4d..3bd22795c3e2 100644 --- a/include/net/inet_ecn.h +++ b/include/net/inet_ecn.h @@ -134,12 +134,14 @@ static inline int INET_ECN_set_ce(struct sk_buff *skb) { switch (skb->protocol) { case cpu_to_be16(ETH_P_IP): - if (skb->network_header + sizeof(struct iphdr) <= skb->tail) + if (skb_network_header(skb) + sizeof(struct iphdr) <= + skb_tail_pointer(skb)) return IP_ECN_set_ce(ip_hdr(skb)); break; case cpu_to_be16(ETH_P_IPV6): - if (skb->network_header + sizeof(struct ipv6hdr) <= skb->tail) + if (skb_network_header(skb) + sizeof(struct ipv6hdr) <= + skb_tail_pointer(skb)) return IP6_ECN_set_ce(ipv6_hdr(skb)); break; } |