netfilter: nf_tables: missing attribute validation in nf_tables_delflowtable()

Return -EINVAL is mandatory attributes are missing.

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 43acdeef045df65241b9a070c073d09742f084d9..2b5aa78979db83a7c33de2ca39432fb2cdd40038 100644 (file)
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -5161,6 +5161,11 @@ static int nf_tables_delflowtable(struct net *net, struct sock *nlsk,
        struct nft_table *table;
        struct nft_ctx ctx;
 
+       if (!nla[NFTA_FLOWTABLE_TABLE] ||
+           (!nla[NFTA_FLOWTABLE_NAME] &&
+            !nla[NFTA_FLOWTABLE_HANDLE]))
+               return -EINVAL;
+
        table = nf_tables_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE],
                                       family, genmask);
        if (IS_ERR(table))