Make sure input numpy array is aligned. (#8690)

- use `np.require` to specify that the alignment is required.
- scipy csr as well.
- validate input pointer in `ArrayInterface`.

src/data/array_interface.h

@@ -1,5 +1,5 @@
-/*!
- * Copyright 2019-2021 by Contributors
+/**
+ * Copyright 2019-2023 by XGBoost Contributors
  * \file array_interface.h
  * \brief View of __array_interface__
  */
@@ -7,9 +7,10 @@
 #define XGBOOST_DATA_ARRAY_INTERFACE_H_
 
 #include <algorithm>
-#include <cinttypes>
+#include <cstdint>
 #include <map>
 #include <string>
+#include <type_traits>  // std::alignment_of
 #include <utility>
 #include <vector>
 
@@ -400,6 +401,13 @@ class ArrayInterface {
 
     data = ArrayInterfaceHandler::ExtractData(array, n);
     static_assert(allow_mask ? D == 1 : D >= 1, "Masked ndarray is not supported.");
+
+    this->DispatchCall([&](auto const *data_typed_ptr) {
+      auto ptr = reinterpret_cast<uintptr_t>(data);
+      auto alignment = std::alignment_of<std::remove_pointer_t<decltype(data_typed_ptr)>>::value;
+      CHECK_EQ(ptr % alignment, 0) << "Input pointer misalignment.";
+    });
+
     if (allow_mask) {
       common::Span<RBitField8::value_type> s_mask;
       size_t n_bits = ArrayInterfaceHandler::ExtractMask(array, &s_mask);