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netfilter: ipv4: Stop using NLA_PUT*().

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These macros contain a hidden goto, and are thus extremely error
prone and make code hard to audit.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2012-04-01 20:40:20 -04:00
parent f3756b79e8
commit d317e4f68f
2 changed files with 9 additions and 8 deletions
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5
net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
View File

@ -303,8 +303,9 @@ getorigdst(struct sock *sk, int optval, void __user *user, int *len)
static int ipv4_tuple_to_nlattr(struct sk_buff *skb,
const struct nf_conntrack_tuple *tuple)
{
NLA_PUT_BE32(skb, CTA_IP_V4_SRC, tuple->src.u3.ip);
NLA_PUT_BE32(skb, CTA_IP_V4_DST, tuple->dst.u3.ip);
if (nla_put_be32(skb, CTA_IP_V4_SRC, tuple->src.u3.ip) ||
nla_put_be32(skb, CTA_IP_V4_DST, tuple->dst.u3.ip))
goto nla_put_failure;
return 0;
nla_put_failure:

12
net/ipv4/netfilter/nf_conntrack_proto_icmp.c
View File

@ -228,10 +228,10 @@ icmp_error(struct net *net, struct nf_conn *tmpl,
static int icmp_tuple_to_nlattr(struct sk_buff *skb,
const struct nf_conntrack_tuple *t)
{
NLA_PUT_BE16(skb, CTA_PROTO_ICMP_ID, t->src.u.icmp.id);
NLA_PUT_U8(skb, CTA_PROTO_ICMP_TYPE, t->dst.u.icmp.type);
NLA_PUT_U8(skb, CTA_PROTO_ICMP_CODE, t->dst.u.icmp.code);
if (nla_put_be16(skb, CTA_PROTO_ICMP_ID, t->src.u.icmp.id) ||
nla_put_u8(skb, CTA_PROTO_ICMP_TYPE, t->dst.u.icmp.type) ||
nla_put_u8(skb, CTA_PROTO_ICMP_CODE, t->dst.u.icmp.code))
goto nla_put_failure;
return 0;
nla_put_failure:
@ -293,8 +293,8 @@ icmp_timeout_obj_to_nlattr(struct sk_buff *skb, const void *data)
{
const unsigned int *timeout = data;
NLA_PUT_BE32(skb, CTA_TIMEOUT_ICMP_TIMEOUT, htonl(*timeout / HZ));
if (nla_put_be32(skb, CTA_TIMEOUT_ICMP_TIMEOUT, htonl(*timeout / HZ)))
goto nla_put_failure;
return 0;
nla_put_failure: