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netfilter: nft_nat: allow to specify layer 4 protocol NAT only 

[ Upstream commit a33f387ecd5aafae514095c2c4a8c24f7aea7e8b ]

nft_nat reports a bogus EAFNOSUPPORT if no layer 3 information is specified.

Fixes: d07db9884a ("netfilter: nf_tables: introduce nft_validate_register_load()")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Pablo Neira Ayuso 2021-07-20 18:22:50 +02:00 committed by Greg Kroah-Hartman
parent 3a7a4cee7b
commit 519582e44e
1 changed files with 3 additions and 1 deletions
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4
net/netfilter/nft_nat.c
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@ -147,7 +147,9 @@ static int nft_nat_init(const struct nft_ctx *ctx, const struct nft_expr *expr,
alen = FIELD_SIZEOF(struct nf_nat_range, min_addr.ip6);
break;
default:
return -EAFNOSUPPORT;
if (tb[NFTA_NAT_REG_ADDR_MIN])
return -EAFNOSUPPORT;
break;
}
priv->family = family;