From e5d25a90886d62d88fdd7cd5c3375f4fe436be64 Mon Sep 17 00:00:00 2001 From: YOSHIFUJI Hideaki Date: Tue, 18 Apr 2006 14:47:44 -0700 Subject: [PATCH] [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 and tested by Kazunori Miyazawa . Signed-off-by: YOSHIFUJI Hideaki Signed-off-by: David S. Miller --- net/ipv6/xfrm6_policy.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c index 588922bd9264..88c840f1beb6 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); -- 2.20.1