path: root/net/ipv6/exthdrs_core.c
diff options
authorSimon Horman <horms@verge.net.au>2013-05-28 20:34:26 +0000
committerDavid S. Miller <davem@davemloft.net>2013-05-28 23:49:07 -0700
commit29a3cad5c6ae9e7fbf1509d01d39c3c3c38f11f9 (patch)
treefd6436d8a820801843ca257807c8af0f36425291 /net/ipv6/exthdrs_core.c
parentnet: Correct comparisons and calculations using skb->tail and skb-transport_header (diff)
ipv6: 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 '')
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/exthdrs_core.c b/net/ipv6/exthdrs_core.c
index c5e83fae4df4..140748debc4a 100644
--- a/net/ipv6/exthdrs_core.c
+++ b/net/ipv6/exthdrs_core.c
@@ -115,7 +115,7 @@ EXPORT_SYMBOL(ipv6_skip_exthdr);
int ipv6_find_tlv(struct sk_buff *skb, int offset, int type)
const unsigned char *nh = skb_network_header(skb);
- int packet_len = skb->tail - skb->network_header;
+ int packet_len = skb_tail_pointer(skb) - skb_network_header(skb);
struct ipv6_opt_hdr *hdr;
int len;