linux-kernel - [PATCH net 5/6] net: hns3: check vlan id before using it

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Message-ID: <20210915135211.9129-6-huangguangbin2@huawei.com>
Date:   Wed, 15 Sep 2021 21:52:10 +0800
From:   Guangbin Huang <huangguangbin2@...wei.com>
To:     <davem@...emloft.net>, <kuba@...nel.org>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <lipeng321@...wei.com>, <huangguangbin2@...wei.com>
Subject: [PATCH net 5/6] net: hns3: check vlan id before using it

From: liaoguojia <liaoguojia@...wei.com>

The input parameters may not be reliable, so check the vlan id before
using it, otherwise may set wrong vlan id into hardware.

Fixes: dc8131d846d4 ("net: hns3: Fix for packet loss due wrong filter config in VLAN tbls")
Signed-off-by: liaoguojia <liaoguojia@...wei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@...wei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index afc88a41a89c..14e9daf09f8c 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -9817,6 +9817,9 @@ static int hclge_set_vlan_filter_hw(struct hclge_dev *hdev, __be16 proto,
 	if (is_kill && !vlan_id)
 		return 0;
 
+	if (vlan_id >= VLAN_N_VID)
+		return -EINVAL;
+
 	ret = hclge_set_vf_vlan_common(hdev, vport_id, is_kill, vlan_id);
 	if (ret) {
 		dev_err(&hdev->pdev->dev,
-- 
2.33.0