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Commit 8e03707f authored by Florian Westphal's avatar Florian Westphal Committed by Pablo Neira Ayuso
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netfilter: xt_HL: prefer skb_ensure_writable 



Also, make the argument to be only the needed size of the header
we're altering, no need to pull in the full packet into linear area.

Signed-off-by: default avatarFlorian Westphal <fw@strlen.de>
Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
parent 7418ee4c

net/netfilter/xt_HL.c

+2 −2
Original line number Diff line number Diff line
@@ -32,7 +32,7 @@ ttl_tg(struct sk_buff *skb, const struct xt_action_param *par) 
	const struct ipt_TTL_info *info = par->targinfo;

	int new_ttl;



	if (!skb_make_writable(skb, skb->len))

	if (skb_ensure_writable(skb, sizeof(*iph)))

		return NF_DROP;



	iph = ip_hdr(skb);
@@ -72,7 +72,7 @@ hl_tg6(struct sk_buff *skb, const struct xt_action_param *par) 
	const struct ip6t_HL_info *info = par->targinfo;

	int new_hl;



	if (!skb_make_writable(skb, skb->len))

	if (skb_ensure_writable(skb, sizeof(*ip6h)))

		return NF_DROP;



	ip6h = ipv6_hdr(skb);