netfilter: nft_ct: reject direction for ct id

Direction attribute is ignored, reject it in case this ever needs to be
supported

Fixes: 3087c3f7c23b ("netfilter: nft_ct: Add ct id support")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/net/netfilter/nft_ct.c b/net/netfilter/nft_ct.c
index aac98a3c966e90e76824dfe5dfa362a857128efa..bfd3e5a14dab68484469bdba71af37a460822549 100644 (file)
--- a/net/netfilter/nft_ct.c
+++ b/net/netfilter/nft_ct.c
@@ -476,6 +476,9 @@ static int nft_ct_get_init(const struct nft_ctx *ctx,
                break;
 #endif
        case NFT_CT_ID:
+               if (tb[NFTA_CT_DIRECTION])
+                       return -EINVAL;
+
                len = sizeof(u32);
                break;
        default: