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authorDavid S. Miller <davem@davemloft.net>2012-04-01 22:50:08 (GMT)
committerDavid S. Miller <davem@davemloft.net>2012-04-01 22:50:08 (GMT)
commit4925a459e96767e84b112c023c3766d4aeefb611 (patch)
treed55f19d684ed0d2c061969e8cce1e3544c9d8b4b /net
parent3c60a17b1b55ac4a72382502c952222b7649d63b (diff)
downloadlinux-4925a459e96767e84b112c023c3766d4aeefb611.tar.xz
nf_conntrack_proto_tcp: Stop using NLA_PUT*().
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>
Diffstat (limited to 'net')
-rw-r--r--net/netfilter/nf_conntrack_proto_tcp.c68
1 files changed, 35 insertions, 33 deletions
diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c
index 361eade..cc55816 100644
--- a/net/netfilter/nf_conntrack_proto_tcp.c
+++ b/net/netfilter/nf_conntrack_proto_tcp.c
@@ -1147,21 +1147,22 @@ static int tcp_to_nlattr(struct sk_buff *skb, struct nlattr *nla,
if (!nest_parms)
goto nla_put_failure;
- NLA_PUT_U8(skb, CTA_PROTOINFO_TCP_STATE, ct->proto.tcp.state);
-
- NLA_PUT_U8(skb, CTA_PROTOINFO_TCP_WSCALE_ORIGINAL,
- ct->proto.tcp.seen[0].td_scale);
-
- NLA_PUT_U8(skb, CTA_PROTOINFO_TCP_WSCALE_REPLY,
- ct->proto.tcp.seen[1].td_scale);
+ if (nla_put_u8(skb, CTA_PROTOINFO_TCP_STATE, ct->proto.tcp.state) ||
+ nla_put_u8(skb, CTA_PROTOINFO_TCP_WSCALE_ORIGINAL,
+ ct->proto.tcp.seen[0].td_scale) ||
+ nla_put_u8(skb, CTA_PROTOINFO_TCP_WSCALE_REPLY,
+ ct->proto.tcp.seen[1].td_scale))
+ goto nla_put_failure;
tmp.flags = ct->proto.tcp.seen[0].flags;
- NLA_PUT(skb, CTA_PROTOINFO_TCP_FLAGS_ORIGINAL,
- sizeof(struct nf_ct_tcp_flags), &tmp);
+ if (nla_put(skb, CTA_PROTOINFO_TCP_FLAGS_ORIGINAL,
+ sizeof(struct nf_ct_tcp_flags), &tmp))
+ goto nla_put_failure;
tmp.flags = ct->proto.tcp.seen[1].flags;
- NLA_PUT(skb, CTA_PROTOINFO_TCP_FLAGS_REPLY,
- sizeof(struct nf_ct_tcp_flags), &tmp);
+ if (nla_put(skb, CTA_PROTOINFO_TCP_FLAGS_REPLY,
+ sizeof(struct nf_ct_tcp_flags), &tmp))
+ goto nla_put_failure;
spin_unlock_bh(&ct->lock);
nla_nest_end(skb, nest_parms);
@@ -1310,28 +1311,29 @@ tcp_timeout_obj_to_nlattr(struct sk_buff *skb, const void *data)
{
const unsigned int *timeouts = data;
- NLA_PUT_BE32(skb, CTA_TIMEOUT_TCP_SYN_SENT,
- htonl(timeouts[TCP_CONNTRACK_SYN_SENT] / HZ));
- NLA_PUT_BE32(skb, CTA_TIMEOUT_TCP_SYN_RECV,
- htonl(timeouts[TCP_CONNTRACK_SYN_RECV] / HZ));
- NLA_PUT_BE32(skb, CTA_TIMEOUT_TCP_ESTABLISHED,
- htonl(timeouts[TCP_CONNTRACK_ESTABLISHED] / HZ));
- NLA_PUT_BE32(skb, CTA_TIMEOUT_TCP_FIN_WAIT,
- htonl(timeouts[TCP_CONNTRACK_FIN_WAIT] / HZ));
- NLA_PUT_BE32(skb, CTA_TIMEOUT_TCP_CLOSE_WAIT,
- htonl(timeouts[TCP_CONNTRACK_CLOSE_WAIT] / HZ));
- NLA_PUT_BE32(skb, CTA_TIMEOUT_TCP_LAST_ACK,
- htonl(timeouts[TCP_CONNTRACK_LAST_ACK] / HZ));
- NLA_PUT_BE32(skb, CTA_TIMEOUT_TCP_TIME_WAIT,
- htonl(timeouts[TCP_CONNTRACK_TIME_WAIT] / HZ));
- NLA_PUT_BE32(skb, CTA_TIMEOUT_TCP_CLOSE,
- htonl(timeouts[TCP_CONNTRACK_CLOSE] / HZ));
- NLA_PUT_BE32(skb, CTA_TIMEOUT_TCP_SYN_SENT2,
- htonl(timeouts[TCP_CONNTRACK_SYN_SENT2] / HZ));
- NLA_PUT_BE32(skb, CTA_TIMEOUT_TCP_RETRANS,
- htonl(timeouts[TCP_CONNTRACK_RETRANS] / HZ));
- NLA_PUT_BE32(skb, CTA_TIMEOUT_TCP_UNACK,
- htonl(timeouts[TCP_CONNTRACK_UNACK] / HZ));
+ if (nla_put_be32(skb, CTA_TIMEOUT_TCP_SYN_SENT,
+ htonl(timeouts[TCP_CONNTRACK_SYN_SENT] / HZ)) ||
+ nla_put_be32(skb, CTA_TIMEOUT_TCP_SYN_RECV,
+ htonl(timeouts[TCP_CONNTRACK_SYN_RECV] / HZ)) ||
+ nla_put_be32(skb, CTA_TIMEOUT_TCP_ESTABLISHED,
+ htonl(timeouts[TCP_CONNTRACK_ESTABLISHED] / HZ)) ||
+ nla_put_be32(skb, CTA_TIMEOUT_TCP_FIN_WAIT,
+ htonl(timeouts[TCP_CONNTRACK_FIN_WAIT] / HZ)) ||
+ nla_put_be32(skb, CTA_TIMEOUT_TCP_CLOSE_WAIT,
+ htonl(timeouts[TCP_CONNTRACK_CLOSE_WAIT] / HZ)) ||
+ nla_put_be32(skb, CTA_TIMEOUT_TCP_LAST_ACK,
+ htonl(timeouts[TCP_CONNTRACK_LAST_ACK] / HZ)) ||
+ nla_put_be32(skb, CTA_TIMEOUT_TCP_TIME_WAIT,
+ htonl(timeouts[TCP_CONNTRACK_TIME_WAIT] / HZ)) ||
+ nla_put_be32(skb, CTA_TIMEOUT_TCP_CLOSE,
+ htonl(timeouts[TCP_CONNTRACK_CLOSE] / HZ)) ||
+ nla_put_be32(skb, CTA_TIMEOUT_TCP_SYN_SENT2,
+ htonl(timeouts[TCP_CONNTRACK_SYN_SENT2] / HZ)) ||
+ nla_put_be32(skb, CTA_TIMEOUT_TCP_RETRANS,
+ htonl(timeouts[TCP_CONNTRACK_RETRANS] / HZ)) ||
+ nla_put_be32(skb, CTA_TIMEOUT_TCP_UNACK,
+ htonl(timeouts[TCP_CONNTRACK_UNACK] / HZ)))
+ goto nla_put_failure;
return 0;
nla_put_failure: