netfilter: nft_masq: correct length for loading protocol registers

[ Upstream commit ec2c5917eb858428b2083d1c74f445aabbe8316b ]

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: 8a6bf5da1aef ("netfilter: nft_masq: support port range")
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Reviewed-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/netfilter/nft_masq.c b/net/netfilter/nft_masq.c
index 2a0adc497bbb4dc5aa399e1b124ca5f677c6bceb..026b4f87d96cca79290e87eabc96125b99191ba4 100644 (file)
--- a/net/netfilter/nft_masq.c
+++ b/net/netfilter/nft_masq.c
@@ -43,7 +43,7 @@ static int nft_masq_init(const struct nft_ctx *ctx,
                         const struct nft_expr *expr,
                         const struct nlattr * const tb[])
 {
-       u32 plen = sizeof_field(struct nf_nat_range, min_addr.all);
+       u32 plen = sizeof_field(struct nf_nat_range, min_proto.all);
        struct nft_masq *priv = nft_expr_priv(expr);
        int err;