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https://issues.apache.org/jira/browse/IMPALA-15377?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on IMPALA-15377 started by Michael Smith.
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> 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
> Assignee: Michael Smith
> Priority: Major
>
> {{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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