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    Subject[PATCH 4.9 26/32] netfilter: nft_nat: allow to specify layer 4 protocol NAT only
    Date
    From: Pablo Neira Ayuso <pablo@netfilter.org>

    [ Upstream commit a33f387ecd5aafae514095c2c4a8c24f7aea7e8b ]

    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>
    Signed-off-by: Sasha Levin <sashal@kernel.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 d2510e432c18..d338d69a0e0b 100644
    --- a/net/netfilter/nft_nat.c
    +++ b/net/netfilter/nft_nat.c
    @@ -157,7 +157,9 @@ 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;

    --
    2.30.2


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