netfilter: nf_tables: reject NFT_SET_ELEM_INTERVAL_END flag for non-interval sets

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index a072d8769b9b..f7e3371ce856 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -3138,6 +3138,9 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
                 elem.flags = ntohl(nla_get_be32(nla[NFTA_SET_ELEM_FLAGS]));
                 if (elem.flags & ~NFT_SET_ELEM_INTERVAL_END)
                         return -EINVAL;
+                if (!(set->flags & NFT_SET_INTERVAL) &&
+                    elem.flags & NFT_SET_ELEM_INTERVAL_END)
+                        return -EINVAL;
         }
 
         if (set->flags & NFT_SET_MAP) {