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[XFRM]: esp: fix skb_tail_pointer conversion bug 

Fix incorrect switch of "trailer" skb by "skb" during skb_tail_pointer
conversion:

-       *(u8*)(trailer->tail - 1) = top_iph->protocol;
+       *(skb_tail_pointer(skb) - 1) = top_iph->protocol;

-       *(u8 *)(trailer->tail - 1) = *skb_network_header(skb);
+       *(skb_tail_pointer(skb) - 1) = *skb_network_header(skb);

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2007-04-09 11:46:17 -07:00 committed by David S. Miller
parent 56eb88828b
commit 557922584d
2 changed files with 2 additions and 2 deletions
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2
net/ipv4/esp4.c
View File

@ -64,7 +64,7 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
esph = (struct ip_esp_hdr *)(skb_network_header(skb) +
top_iph->ihl * 4);
top_iph->tot_len = htons(skb->len + alen);
*(skb_tail_pointer(skb) - 1) = top_iph->protocol;
*(skb_tail_pointer(trailer) - 1) = top_iph->protocol;
/* this is non-NULL only with UDP Encapsulation */
if (x->encap) {

2
net/ipv6/esp6.c
View File

@ -91,7 +91,7 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
top_iph = (struct ipv6hdr *)__skb_push(skb, hdr_len);
esph = (struct ipv6_esp_hdr *)skb_transport_header(skb);
top_iph->payload_len = htons(skb->len + alen - sizeof(*top_iph));
*(skb_tail_pointer(skb) - 1) = *skb_network_header(skb);
*(skb_tail_pointer(trailer) - 1) = *skb_network_header(skb);
*skb_network_header(skb) = IPPROTO_ESP;
esph->spi = x->id.spi;