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netfilter: conntrack, nat: prefer skb_ensure_writable

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like previous patches -- convert conntrack to use the core helper.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2019-05-23 15:44:07 +02:00 committed by Pablo Neira Ayuso
parent ec0974df35
commit 86f0453854
4 changed files with 17 additions and 17 deletions
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2
net/netfilter/nf_conntrack_proto_sctp.c
View File

@ -339,7 +339,7 @@ static bool sctp_error(struct sk_buff *skb,
if (state->hook == NF_INET_PRE_ROUTING &&
state->net->ct.sysctl_checksum &&
skb->ip_summed == CHECKSUM_NONE) {
if (!skb_make_writable(skb, dataoff + sizeof(struct sctphdr))) {
if (skb_ensure_writable(skb, dataoff + sizeof(*sh))) {
logmsg = "nf_ct_sctp: failed to read header ";
goto out_invalid;
}

4
net/netfilter/nf_conntrack_seqadj.c
View File

@ -126,7 +126,7 @@ static unsigned int nf_ct_sack_adjust(struct sk_buff *skb,
optoff = protoff + sizeof(struct tcphdr);
optend = protoff + tcph->doff * 4;
if (!skb_make_writable(skb, optend))
if (skb_ensure_writable(skb, optend))
return 0;
tcph = (void *)skb->data + protoff;
@ -176,7 +176,7 @@ int nf_ct_seq_adjust(struct sk_buff *skb,
this_way = &seqadj->seq[dir];
other_way = &seqadj->seq[!dir];
if (!skb_make_writable(skb, protoff + sizeof(*tcph)))
if (skb_ensure_writable(skb, protoff + sizeof(*tcph)))
return 0;
tcph = (void *)skb->data + protoff;

4
net/netfilter/nf_nat_helper.c
View File

@ -98,7 +98,7 @@ bool __nf_nat_mangle_tcp_packet(struct sk_buff *skb,
struct tcphdr *tcph;
int oldlen, datalen;
if (!skb_make_writable(skb, skb->len))
if (skb_ensure_writable(skb, skb->len))
return false;
if (rep_len > match_len &&
@ -148,7 +148,7 @@ nf_nat_mangle_udp_packet(struct sk_buff *skb,
struct udphdr *udph;
int datalen, oldlen;
if (!skb_make_writable(skb, skb->len))
if (skb_ensure_writable(skb, skb->len))
return false;
if (rep_len > match_len &&

24
net/netfilter/nf_nat_proto.c
View File

@ -73,7 +73,7 @@ static bool udp_manip_pkt(struct sk_buff *skb,
struct udphdr *hdr;
bool do_csum;
if (!skb_make_writable(skb, hdroff + sizeof(*hdr)))
if (skb_ensure_writable(skb, hdroff + sizeof(*hdr)))
return false;
hdr = (struct udphdr *)(skb->data + hdroff);
@ -91,7 +91,7 @@ static bool udplite_manip_pkt(struct sk_buff *skb,
#ifdef CONFIG_NF_CT_PROTO_UDPLITE
struct udphdr *hdr;
if (!skb_make_writable(skb, hdroff + sizeof(*hdr)))
if (skb_ensure_writable(skb, hdroff + sizeof(*hdr)))
return false;
hdr = (struct udphdr *)(skb->data + hdroff);
@ -117,7 +117,7 @@ sctp_manip_pkt(struct sk_buff *skb,
if (skb->len >= hdroff + sizeof(*hdr))
hdrsize = sizeof(*hdr);
if (!skb_make_writable(skb, hdroff + hdrsize))
if (skb_ensure_writable(skb, hdroff + hdrsize))
return false;
hdr = (struct sctphdr *)(skb->data + hdroff);
@ -158,7 +158,7 @@ tcp_manip_pkt(struct sk_buff *skb,
if (skb->len >= hdroff + sizeof(struct tcphdr))
hdrsize = sizeof(struct tcphdr);
if (!skb_make_writable(skb, hdroff + hdrsize))
if (skb_ensure_writable(skb, hdroff + hdrsize))
return false;
hdr = (struct tcphdr *)(skb->data + hdroff);
@ -198,7 +198,7 @@ dccp_manip_pkt(struct sk_buff *skb,
if (skb->len >= hdroff + sizeof(struct dccp_hdr))
hdrsize = sizeof(struct dccp_hdr);
if (!skb_make_writable(skb, hdroff + hdrsize))
if (skb_ensure_writable(skb, hdroff + hdrsize))
return false;
hdr = (struct dccp_hdr *)(skb->data + hdroff);
@ -232,7 +232,7 @@ icmp_manip_pkt(struct sk_buff *skb,
{
struct icmphdr *hdr;
if (!skb_make_writable(skb, hdroff + sizeof(*hdr)))
if (skb_ensure_writable(skb, hdroff + sizeof(*hdr)))
return false;
hdr = (struct icmphdr *)(skb->data + hdroff);
@ -250,7 +250,7 @@ icmpv6_manip_pkt(struct sk_buff *skb,
{
struct icmp6hdr *hdr;
if (!skb_make_writable(skb, hdroff + sizeof(*hdr)))
if (skb_ensure_writable(skb, hdroff + sizeof(*hdr)))
return false;
hdr = (struct icmp6hdr *)(skb->data + hdroff);
@ -278,7 +278,7 @@ gre_manip_pkt(struct sk_buff *skb,
/* pgreh includes two optional 32bit fields which are not required
* to be there. That's where the magic '8' comes from */
if (!skb_make_writable(skb, hdroff + sizeof(*pgreh) - 8))
if (skb_ensure_writable(skb, hdroff + sizeof(*pgreh) - 8))
return false;
greh = (void *)skb->data + hdroff;
@ -350,7 +350,7 @@ static bool nf_nat_ipv4_manip_pkt(struct sk_buff *skb,
struct iphdr *iph;
unsigned int hdroff;
if (!skb_make_writable(skb, iphdroff + sizeof(*iph)))
if (skb_ensure_writable(skb, iphdroff + sizeof(*iph)))
return false;
iph = (void *)skb->data + iphdroff;
@ -381,7 +381,7 @@ static bool nf_nat_ipv6_manip_pkt(struct sk_buff *skb,
int hdroff;
u8 nexthdr;
if (!skb_make_writable(skb, iphdroff + sizeof(*ipv6h)))
if (skb_ensure_writable(skb, iphdroff + sizeof(*ipv6h)))
return false;
ipv6h = (void *)skb->data + iphdroff;
@ -565,7 +565,7 @@ int nf_nat_icmp_reply_translation(struct sk_buff *skb,
WARN_ON(ctinfo != IP_CT_RELATED && ctinfo != IP_CT_RELATED_REPLY);
if (!skb_make_writable(skb, hdrlen + sizeof(*inside)))
if (skb_ensure_writable(skb, hdrlen + sizeof(*inside)))
return 0;
if (nf_ip_checksum(skb, hooknum, hdrlen, 0))
return 0;
@ -787,7 +787,7 @@ int nf_nat_icmpv6_reply_translation(struct sk_buff *skb,
WARN_ON(ctinfo != IP_CT_RELATED && ctinfo != IP_CT_RELATED_REPLY);
if (!skb_make_writable(skb, hdrlen + sizeof(*inside)))
if (skb_ensure_writable(skb, hdrlen + sizeof(*inside)))
return 0;
if (nf_ip6_checksum(skb, hooknum, hdrlen, IPPROTO_ICMPV6))
return 0;