set new value to resp_data_len if its value > HCLGE_MBX_MAX_RESP_DATA_SIZE

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

If HCLGE_MBX_MAX_RESP_DATA_SIZE > HCLGE_MBX_MAX_RESP_DATA_SIZE,
the memcpy will cause out of memory.

Feature or Bugfix: Bugfix
Signed-off-by: Nlipeng (Y) <lipeng321@huawei.com>
Reviewed-by: Nshenjian <shenjian15@huawei.com>
Reviewed-by: NYang Yingliang <yangyingliang@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c

@@ -58,6 +58,10 @@ static int hclge_gen_resp_to_vf(struct hclge_vport *vport,
 			"PF fail to gen resp to VF len %d exceeds max len %d\n",
 			resp_data_len,
 			HCLGE_MBX_MAX_RESP_DATA_SIZE);
+		/* If resp_data_len is too long, set the value to max length
+		 * and return the msg to VF
+		 */
+		resp_data_len = HCLGE_MBX_MAX_RESP_DATA_SIZE;
 	}
 
 	hclge_cmd_setup_basic_desc(&desc, HCLGEVF_OPC_MBX_PF_TO_VF, false);