[ET][Portable] Check scalar overflow: op_constant_pad_nd

Pull Request resolved: #12026


ghstack-source-id: 293086872
@exported-using-ghexport

Differential Revision: [D77401089](https://our.internmc.facebook.com/intern/diff/D77401089/)

Author: manuelcandales

kernels/portable/cpu/op_constant_pad_nd.cpp

@@ -185,7 +185,10 @@ Tensor& constant_pad_nd_out(
   ScalarType in_type = in.scalar_type();
 
   ET_SWITCH_REALHBBF16_TYPES(in_type, ctx, "constant_pad_nd.out", CTYPE, [&]() {
-    const CTYPE value_casted = utils::scalar_to<CTYPE>(value);
+    auto opt_value_casted =
+        utils::internal::check_overflow_scalar_cast<CTYPE>(value);
+    ET_KERNEL_CHECK(ctx, opt_value_casted.has_value(), InvalidArgument, );
+    auto value_casted = opt_value_casted.value();
     constant_pad_nd_out_impl<CTYPE>(in, pad, value_casted, out);
   });
 

kernels/test/op_constant_pad_nd_test.cpp

@@ -7,6 +7,7 @@
  */
 
 #include <executorch/kernels/test/FunctionHeaderWrapper.h> // Declares the operator
+#include <executorch/kernels/test/ScalarOverflowTestMacros.h>
 #include <executorch/kernels/test/TestUtil.h>
 #include <executorch/kernels/test/supported_features.h>
 #include <executorch/runtime/core/exec_aten/exec_aten.h>
@@ -347,6 +348,21 @@ class OpConstantPadNDOutTest : public OperatorTest {
     op_constant_pad_nd_out(self, padding_ref, 7, out);
     EXPECT_TENSOR_CLOSE(out, expected);
   }
+
+  template <ScalarType DTYPE>
+  void expect_bad_scalar_value_dies(const Scalar& bad_value) {
+    TensorFactory<DTYPE> tf;
+    const std::vector<int32_t> sizes = {2, 2};
+    const std::vector<int32_t> sizes_out = {2, 4};
+    const std::vector<int64_t> padding = {1, 1};
+
+    IntArrayRef padding_ref = IntArrayRef(padding.data(), padding.size());
+    Tensor self = tf.ones(sizes);
+    Tensor out = tf.zeros(sizes_out);
+
+    ET_EXPECT_KERNEL_FAILURE(
+        context_, op_constant_pad_nd_out(self, padding_ref, bad_value, out));
+  }
 };
 
 TEST_F(OpConstantPadNDOutTest, TestPadDim2) {
@@ -465,3 +481,5 @@ TEST_F(OpConstantPadNDOutTest, IncorrectOutputShapeFail) {
   ET_EXPECT_KERNEL_FAILURE(
       context_, op_constant_pad_nd_out(self, padding_ref, 0, out));
 }
+
+GENERATE_SCALAR_OVERFLOW_TESTS(OpConstantPadNDOutTest)