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  1. Apache Arrow
  2. ARROW-6572

[C++] Reading some Parquet data can return uninitialized memory

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Details

    • Bug
    • Status: Resolved
    • Critical
    • Resolution: Fixed
    • 0.14.1
    • 0.15.0
    • C++

    Description

      In https://github.com/apache/arrow/pull/5365 we found via a UBSAN issue that Parquet decoding of RLE-encoded dict-encoded Parquet data with nulls does not initialize the output data array for null entries. Since the output data array is generally a freshly-allocated memory buffer, this means it will contain uninitialized memory.

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              apitrou Antoine Pitrou
              apitrou Antoine Pitrou
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