netfilter: nft_redir: correct length for loading protocol registers

The values in the protocol registers are two bytes wide.  However, when
parsing the register loads, the code currently uses the larger 16-byte
size of a `union nf_inet_addr`.  Change it to use the (correct) size of
a `union nf_conntrack_man_proto` instead.

Fixes: d07db9884a5f ("netfilter: nf_tables: introduce nft_validate_register_load()")
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Reviewed-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/net/netfilter/nft_redir.c b/net/netfilter/nft_redir.c
index 5f77399..dbc642f 100644 (file)
--- a/net/netfilter/nft_redir.c
+++ b/net/netfilter/nft_redir.c
@@ -48,7 +48,7 @@ static int nft_redir_init(const struct nft_ctx *ctx,
        unsigned int plen;
        int err;
 
-       plen = sizeof_field(struct nf_nat_range, min_addr.all);
+       plen = sizeof_field(struct nf_nat_range, min_proto.all);
        if (tb[NFTA_REDIR_REG_PROTO_MIN]) {
                err = nft_parse_register_load(tb[NFTA_REDIR_REG_PROTO_MIN],
                                              &priv->sreg_proto_min, plen);