[SK_BUFF]: Introduce skb_network_offset()

For the quite common 'skb->nh.raw - skb->data' sequence.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index d41e24d6ae41..addb58501057 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2944,7 +2944,7 @@ static int selinux_parse_skb_ipv4(struct sk_buff *skb,
         int offset, ihlen, ret = -EINVAL;
         struct iphdr _iph, *ih;
 
-        offset = skb->nh.raw - skb->data;
+        offset = skb_network_offset(skb);
         ih = skb_header_pointer(skb, offset, sizeof(_iph), &_iph);
         if (ih == NULL)
                 goto out;
@@ -3026,7 +3026,7 @@ static int selinux_parse_skb_ipv6(struct sk_buff *skb,
         int ret = -EINVAL, offset;
         struct ipv6hdr _ipv6h, *ip6;
 
-        offset = skb->nh.raw - skb->data;
+        offset = skb_network_offset(skb);
         ip6 = skb_header_pointer(skb, offset, sizeof(_ipv6h), &_ipv6h);
         if (ip6 == NULL)
                 goto out;