ipv4: Correct comparisons and calculations using skb->tail and skb-transport_header
authorSimon Horman <horms@verge.net.au>
Tue, 28 May 2013 20:34:27 +0000 (20:34 +0000)
committerDavid S. Miller <davem@davemloft.net>
Wed, 29 May 2013 06:49:07 +0000 (23:49 -0700)
commitf7c0c2ae843b74f8dba55820cb0a3de19c976703
treee2bd88b85cecb6f616a16a5926342dd35c059a97
parent29a3cad5c6ae9e7fbf1509d01d39c3c3c38f11f9
ipv4: 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>
net/ipv4/icmp.c
net/ipv4/igmp.c
net/ipv4/tcp.c