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authorPablo Neira Ayuso <pablo@netfilter.org>2005-11-22 14:54:34 -0800
committerDavid S. Miller <davem@davemloft.net>2005-11-22 14:54:34 -0800
commit00cb277a4a1fb76aafb2fb28aa99f30546e619c5 (patch)
tree8ea9a2434eb55d2ff60bbff3dbc85817a7607493 /net
parent0ff60a45678e67b2547256a636fd00c1667ce4fa (diff)
[NETFILTER] ctnetlink: Fix refcount leak ip_conntrack/nat_proto
Remove proto == NULL checking since ip_conntrack_[nat_]proto_find_get always returns a valid pointer. Fix missing ip_conntrack_proto_put in some paths. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Harald Welte <laforge@netfilter.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/netfilter/ip_conntrack_netlink.c24
1 files changed, 12 insertions, 12 deletions
diff --git a/net/ipv4/netfilter/ip_conntrack_netlink.c b/net/ipv4/netfilter/ip_conntrack_netlink.c
index de9f4464438d..6c18a2b6d5ce 100644
--- a/net/ipv4/netfilter/ip_conntrack_netlink.c
+++ b/net/ipv4/netfilter/ip_conntrack_netlink.c
@@ -59,11 +59,13 @@ ctnetlink_dump_tuples_proto(struct sk_buff *skb,
NFA_PUT(skb, CTA_PROTO_NUM, sizeof(u_int8_t), &tuple->dst.protonum);
+ /* If no protocol helper is found, this function will return the
+ * generic protocol helper, so proto won't *ever* be NULL */
proto = ip_conntrack_proto_find_get(tuple->dst.protonum);
- if (likely(proto && proto->tuple_to_nfattr)) {
+ if (likely(proto->tuple_to_nfattr))
ret = proto->tuple_to_nfattr(skb, tuple);
- ip_conntrack_proto_put(proto);
- }
+
+ ip_conntrack_proto_put(proto);
return ret;
@@ -128,9 +130,11 @@ ctnetlink_dump_protoinfo(struct sk_buff *skb, const struct ip_conntrack *ct)
struct nfattr *nest_proto;
int ret;
-
- if (!proto || !proto->to_nfattr)
+
+ if (!proto->to_nfattr) {
+ ip_conntrack_proto_put(proto);
return 0;
+ }
nest_proto = NFA_NEST(skb, CTA_PROTOINFO);
@@ -527,10 +531,10 @@ ctnetlink_parse_tuple_proto(struct nfattr *attr,
proto = ip_conntrack_proto_find_get(tuple->dst.protonum);
- if (likely(proto && proto->nfattr_to_tuple)) {
+ if (likely(proto->nfattr_to_tuple))
ret = proto->nfattr_to_tuple(tb, tuple);
- ip_conntrack_proto_put(proto);
- }
+
+ ip_conntrack_proto_put(proto);
return ret;
}
@@ -596,8 +600,6 @@ static int ctnetlink_parse_nat_proto(struct nfattr *attr,
return -EINVAL;
npt = ip_nat_proto_find_get(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum);
- if (!npt)
- return 0;
if (!npt->nfattr_to_range) {
ip_nat_proto_put(npt);
@@ -957,8 +959,6 @@ ctnetlink_change_protoinfo(struct ip_conntrack *ct, struct nfattr *cda[])
nfattr_parse_nested(tb, CTA_PROTOINFO_MAX, attr);
proto = ip_conntrack_proto_find_get(npt);
- if (!proto)
- return -EINVAL;
if (proto->from_nfattr)
err = proto->from_nfattr(tb, ct);