Re: [PR] GH-39527: [C++][Parquet] Validate page sizes before truncating to int32 [arrow]

["emkornfield (via GitHub)" <gi...@apache.org>]

emkornfield commented on code in PR #39528:
URL: https://github.com/apache/arrow/pull/39528#discussion_r1462454654


##########
cpp/src/parquet/column_writer_test.cc:
##########
@@ -889,6 +891,44 @@ TEST_F(TestByteArrayValuesWriter, CheckDefaultStats) {
   ASSERT_TRUE(this->metadata_is_stats_set());
 }
 
+TEST(TestPageWriter, ThrowsOnPagesTooLarge) {
+  NodePtr item = schema::Int32("item");  // optional item
+  NodePtr list(GroupNode::Make("b", Repetition::REPEATED, {item}, ConvertedType::LIST));
+  NodePtr bag(GroupNode::Make("bag", Repetition::OPTIONAL, {list}));  // optional list
+  std::vector<NodePtr> fields = {bag};
+  NodePtr root = GroupNode::Make("schema", Repetition::REPEATED, fields);
+
+  SchemaDescriptor schema;
+  schema.Init(root);
+
+  auto sink = CreateOutputStream();
+  auto props = WriterProperties::Builder().build();
+
+  auto metadata = ColumnChunkMetaDataBuilder::Make(props, schema.Column(0));
+  std::unique_ptr<PageWriter> pager =
+      PageWriter::Open(sink, Compression::UNCOMPRESSED,
+                       Codec::UseDefaultCompressionLevel(), metadata.get());
+
+  uint8_t data;
+  std::shared_ptr<Buffer> buffer =
+      std::make_shared<Buffer>(&data, std::numeric_limits<int32_t>::max() + int64_t{1});
+  DataPageV1 over_compressed_limit(buffer, /*num_values=*/100, Encoding::BIT_PACKED,
+                                   Encoding::BIT_PACKED, Encoding::BIT_PACKED,
+                                   /*uncompressed_size=*/100);
+  EXPECT_THROW(pager->WriteDataPage(over_compressed_limit), ParquetException);

Review Comment:
   done.



##########
cpp/src/parquet/column_writer.cc:
##########
@@ -288,6 +291,9 @@ class SerializedPageWriter : public PageWriter {
     dict_page_header.__set_is_sorted(page.is_sorted());
 
     const uint8_t* output_data_buffer = compressed_data->data();
+    if (compressed_data->size() > std::numeric_limits<int32_t>::max()) {
+      throw ParquetException("Compressed page size overflows to INT32_MAX.");

Review Comment:
   done.



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