[IPV6] XFRM: Fix decoding session with preceding extension header(s).
We did not correctly decode session with preceding extension
header(s). This was because we had already pulled preceding
headers, skb->nh.raw + 40 + 1 - skb->data was minus, and
pskb_may_pull() failed.
We now have IP6CB(skb)->nhoff and skb->h.raw, and we can
start parsing / decoding upper layer protocol from current
position.
Tracked down by Noriaki TAKAMIYA <[EMAIL PROTECTED]>
and tested by Kazunori Miyazawa <[EMAIL PROTECTED]>.
Signed-off-by: YOSHIFUJI Hideaki <[EMAIL PROTECTED]>
---
net/ipv6/xfrm6_policy.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
2556f141ba4ee513141aaf2a984e98e1e06a8c44
diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
index 588922b..88c840f 100644
--- a/net/ipv6/xfrm6_policy.c
+++ b/net/ipv6/xfrm6_policy.c
@@ -191,10 +191,10 @@ error:
static inline void
_decode_session6(struct sk_buff *skb, struct flowi *fl)
{
- u16 offset = sizeof(struct ipv6hdr);
+ u16 offset = skb->h.raw - skb->nh.raw;
struct ipv6hdr *hdr = skb->nh.ipv6h;
struct ipv6_opt_hdr *exthdr;
- u8 nexthdr = skb->nh.ipv6h->nexthdr;
+ u8 nexthdr = skb->nh.raw[IP6CB(skb)->nhoff];
memset(fl, 0, sizeof(struct flowi));
ipv6_addr_copy(&fl->fl6_dst, &hdr->daddr);
--
1.0.8
-
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