Thread (8 messages) 8 messages, 2 authors, 2021-07-23
STALE1812d
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[PATCH net 5/6] netfilter: nft_nat: allow to specify layer 4 protocol NAT only

From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: 2021-07-23 15:54:51
Also in: netfilter-devel
Subsystem: netfilter, networking [general], the rest · Maintainers: Pablo Neira Ayuso, Florian Westphal, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds 

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

Fixes: d07db9884a5f ("netfilter: nf_tables: introduce nft_validate_register_load()")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nft_nat.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/netfilter/nft_nat.c b/net/netfilter/nft_nat.c
index 0840c635b752..be1595d6979d 100644
--- a/net/netfilter/nft_nat.c
+++ b/net/netfilter/nft_nat.c
@@ -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);
 		break;
 	default:
-		return -EAFNOSUPPORT;
+		if (tb[NFTA_NAT_REG_ADDR_MIN])
+			return -EAFNOSUPPORT;
+		break;
 	}
 	priv->family = family;
 
-- 
2.20.1
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