Michael Smith created IMPALA-15377:
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Summary: ASAN heap-buffer-overflow in ParquetDeltaEncoder for
empty pages
Key: IMPALA-15377
URL: https://issues.apache.org/jira/browse/IMPALA-15377
Project: IMPALA
Issue Type: Bug
Components: Backend
Reporter: Michael Smith
{{ParquetDeltaEncoder::FinalizePage()}} unconditionally writes a page header
even when zero values have been written (\{{total_value_count_ == 0}}), using
an uninitialized {{first_value_}} and requiring more space than
{{WorstCaseOutputSize(0) }}(which returns 0) reserves. This caused a
heap-buffer-overflow write in BitWriter::PutAligned via WriteHeader, hit by
ParquetDeltaLengthByteArrayDecoderTest.EmptyPage on ASAN builds with newer
Clang versions.
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