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| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2005-11-22 14:54:34 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2005-11-22 14:54:34 -0800 |
| commit | 00cb277a4a1fb76aafb2fb28aa99f30546e619c5 (patch) | |
| tree | 8ea9a2434eb55d2ff60bbff3dbc85817a7607493 /net/ipv4 | |
| parent | 0ff60a45678e67b2547256a636fd00c1667ce4fa (diff) | |
| download | blackbird-op-linux-00cb277a4a1fb76aafb2fb28aa99f30546e619c5.tar.gz blackbird-op-linux-00cb277a4a1fb76aafb2fb28aa99f30546e619c5.zip | |
[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/ipv4')
| -rw-r--r-- | net/ipv4/netfilter/ip_conntrack_netlink.c | 24 |
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); |
