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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, wenxu <wenxu@ucloud.cn>,
        Pablo Neira Ayuso <pablo@netfilter.org>,
        Saeed Mahameed <saeedm@nvidia.com>
Subject: [PATCH 5.11 080/122] net/mlx5e: fix ingress_ifindex check in mlx5e_flower_parse_meta
Date:   Mon, 19 Apr 2021 15:06:00 +0200
Message-Id: <20210419130532.886968440@linuxfoundation.org>
In-Reply-To: <20210419130530.166331793@linuxfoundation.org>
References: <20210419130530.166331793@linuxfoundation.org>
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From: wenxu <wenxu@ucloud.cn>

commit e3e0f9b279705154b951d579dc3d8b7041710e24 upstream.

In the nft_offload there is the mate flow_dissector with no
ingress_ifindex but with ingress_iftype that only be used
in the software. So if the mask of ingress_ifindex in meta is
0, this meta check should be bypass.

Fixes: 6d65bc64e232 ("net/mlx5e: Add mlx5e_flower_parse_meta support")
Signed-off-by: wenxu <wenxu@ucloud.cn>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_tc.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -2194,6 +2194,9 @@ static int mlx5e_flower_parse_meta(struc
 		return 0;
 
 	flow_rule_match_meta(rule, &match);
+	if (!match.mask->ingress_ifindex)
+		return 0;
+
 	if (match.mask->ingress_ifindex != 0xFFFFFFFF) {
 		NL_SET_ERR_MSG_MOD(extack, "Unsupported ingress ifindex mask");
 		return -EOPNOTSUPP;