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

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[ Upstream commit a33f387ecd ]

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 3dbda8483f
commit cbc8012902
1 changed files with 3 additions and 1 deletions
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2
net/netfilter/nft_nat.c
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@@ -201,7 +201,9 @@ static int nft_nat_init(const struct nft_ctx *ctx, const struct nft_expr *expr,
alen = sizeof_field(struct nf_nat_range, min_addr.ip6); alen = sizeof_field(struct nf_nat_range, min_addr.ip6);
break; break;
default: default:
if (tb[NFTA_NAT_REG_ADDR_MIN])
return -EAFNOSUPPORT; return -EAFNOSUPPORT;
break;
} }
priv->family = family; priv->family = family;