netfilter: nf_tables: validate family when identifying table via handle

Validate table family when looking up for it via NFTA_TABLE_HANDLE.

Fixes: 3ecbfd65f50e ("netfilter: nf_tables: allocate handle and delete objects via handle")
Reported-by: Xingyuan Mo <hdthky0@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index c0a42989b982266aa7378f06c0a46b5668335d3a..c5c17c6e80eda1f5a33e035a427ee4b2be2f786f 100644 (file)
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -803,7 +803,7 @@ static struct nft_table *nft_table_lookup(const struct net *net,
 
 static struct nft_table *nft_table_lookup_byhandle(const struct net *net,
                                                   const struct nlattr *nla,
-                                                  u8 genmask, u32 nlpid)
+                                                  int family, u8 genmask, u32 nlpid)
 {
        struct nftables_pernet *nft_net;
        struct nft_table *table;
@@ -811,6 +811,7 @@ static struct nft_table *nft_table_lookup_byhandle(const struct net *net,
        nft_net = nft_pernet(net);
        list_for_each_entry(table, &nft_net->tables, list) {
                if (be64_to_cpu(nla_get_be64(nla)) == table->handle &&
+                   table->family == family &&
                    nft_active_genmask(table, genmask)) {
                        if (nft_table_has_owner(table) &&
                            nlpid && table->nlpid != nlpid)
@@ -1544,7 +1545,7 @@ static int nf_tables_deltable(struct sk_buff *skb, const struct nfnl_info *info,
 
        if (nla[NFTA_TABLE_HANDLE]) {
                attr = nla[NFTA_TABLE_HANDLE];
-               table = nft_table_lookup_byhandle(net, attr, genmask,
+               table = nft_table_lookup_byhandle(net, attr, family, genmask,
                                                  NETLINK_CB(skb).portid);
        } else {
                attr = nla[NFTA_TABLE_NAME];