netfilter: nft_dynset: disallow object maps

Do not allow to insert elements from datapath to objects maps.

Fixes: 8aeff920dcc9 ("netfilter: nf_tables: add stateful object reference to set elements")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Florian Westphal <fw@strlen.de>

diff --git a/net/netfilter/nft_dynset.c b/net/netfilter/nft_dynset.c
index 4fb34d7..5c5cc01 100644 (file)
--- a/net/netfilter/nft_dynset.c
+++ b/net/netfilter/nft_dynset.c
@@ -191,6 +191,9 @@ static int nft_dynset_init(const struct nft_ctx *ctx,
        if (IS_ERR(set))
                return PTR_ERR(set);
 
+       if (set->flags & NFT_SET_OBJECT)
+               return -EOPNOTSUPP;
+
        if (set->ops->update == NULL)
                return -EOPNOTSUPP;