diff options
| author | YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org> | 2006-04-19 11:13:58 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-04-24 09:56:04 -0700 |
| commit | 9c974666ab18eaa9c74eb0fb346271f343709a9d (patch) | |
| tree | 6c9d3fd08785fdeaef45b588d1c43b32786547fa | |
| parent | 00905d543081c11b3823577b951e22fdf3260477 (diff) | |
[PATCH] IPV6: Ensure to have hop-by-hop options in our header of &sk_buff.
[IPV6]: Ensure to have hop-by-hop options in our header of &sk_buff.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | net/ipv6/exthdrs.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c index 2a1e7e45b890..d88cab7b973f 100644 --- a/net/ipv6/exthdrs.c +++ b/net/ipv6/exthdrs.c @@ -489,6 +489,18 @@ int ipv6_parse_hopopts(struct sk_buff *skb, int nhoff) { struct inet6_skb_parm *opt = IP6CB(skb); + /* + * skb->nh.raw is equal to skb->data, and + * skb->h.raw - skb->nh.raw is always equal to + * sizeof(struct ipv6hdr) by definition of + * hop-by-hop options. + */ + if (!pskb_may_pull(skb, sizeof(struct ipv6hdr) + 8) || + !pskb_may_pull(skb, sizeof(struct ipv6hdr) + ((skb->h.raw[1] + 1) << 3))) { + kfree_skb(skb); + return -1; + } + opt->hop = sizeof(struct ipv6hdr); if (ip6_parse_tlv(tlvprochopopt_lst, skb)) { skb->h.raw += (skb->h.raw[1]+1)<<3; |