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);
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);