netdev - [PATCH net 4/5] net: hns3: void array out of bound when loop tnl

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Message-ID: <20240813141024.1707252-5-shaojijie@huawei.com>
Date: Tue, 13 Aug 2024 22:10:23 +0800
From: Jijie Shao <shaojijie@...wei.com>
To: <yisen.zhuang@...wei.com>, <salil.mehta@...wei.com>,
	<davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
	<pabeni@...hat.com>, <horms@...nel.org>
CC: <shenjian15@...wei.com>, <wangjie125@...wei.com>,
	<liuyonglong@...wei.com>, <wangpeiyang1@...wei.com>, <shaojijie@...wei.com>,
	<jonathan.cameron@...wei.com>, <shameerali.kolothum.thodi@...wei.com>,
	<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH net 4/5] net: hns3: void array out of bound when loop tnl_num

From: Peiyang Wang <wangpeiyang1@...wei.com>

When query reg inf of SSU, it loops tnl_num times. However, tnl_num comes
from hardware and the length of array is a fixed value. To void array out
of bound, make sure the loop time is not greater than the length of array

Signed-off-by: Peiyang Wang <wangpeiyang1@...wei.com>
Signed-off-by: Jijie Shao <shaojijie@...wei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c
index e132c2f09560..cc7f46c0b35f 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c
@@ -1598,8 +1598,7 @@ static void hclge_query_reg_info_of_ssu(struct hclge_dev *hdev)
 {
 	u32 loop_para[HCLGE_MOD_MSG_PARA_ARRAY_MAX_SIZE] = {0};
 	struct hclge_mod_reg_common_msg msg;
-	u8 i, j, num;
-	u32 loop_time;
+	u8 i, j, num, loop_time;
 
 	num = ARRAY_SIZE(hclge_ssu_reg_common_msg);
 	for (i = 0; i < num; i++) {
@@ -1609,7 +1608,8 @@ static void hclge_query_reg_info_of_ssu(struct hclge_dev *hdev)
 		loop_time = 1;
 		loop_para[0] = 0;
 		if (msg.need_para) {
-			loop_time = hdev->ae_dev->dev_specs.tnl_num;
+			loop_time = min(hdev->ae_dev->dev_specs.tnl_num,
+					HCLGE_MOD_MSG_PARA_ARRAY_MAX_SIZE);
 			for (j = 0; j < loop_time; j++)
 				loop_para[j] = j + 1;
 		}
-- 
2.33.0