netfilter: nf_tables: relax string validation of NFTA_CHAIN_TYPE

Use NLA_STRING for consistency with other string attributes in
nf_tables.

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 1d0c174d30fc81ffa8f9eebd67c045af4a8b0cd8..a5ca900912e143f7193418e582e2dd72da6eb09a 100644 (file)
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -541,7 +541,7 @@ static const struct nla_policy nft_chain_policy[NFTA_CHAIN_MAX + 1] = {
                                    .len = NFT_CHAIN_MAXNAMELEN - 1 },
        [NFTA_CHAIN_HOOK]       = { .type = NLA_NESTED },
        [NFTA_CHAIN_POLICY]     = { .type = NLA_U32 },
-       [NFTA_CHAIN_TYPE]       = { .type = NLA_NUL_STRING },
+       [NFTA_CHAIN_TYPE]       = { .type = NLA_STRING },
        [NFTA_CHAIN_COUNTERS]   = { .type = NLA_NESTED },
 };