Messages in this thread Patch in this message | | | Date | Thu, 20 Apr 2006 21:38:42 -0700 | From | Greg KH <> | Subject | [patch 10/22] IPV6: Ensure to have hop-by-hop options in our header of &sk_buff. |
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[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>
---
--- net/ipv6/exthdrs.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
--- linux-2.6.16.9.orig/net/ipv6/exthdrs.c +++ linux-2.6.16.9/net/ipv6/exthdrs.c @@ -489,6 +489,18 @@ int ipv6_parse_hopopts(struct sk_buff *s { 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; -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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