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  1. Apache Arrow
  2. ARROW-6572

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

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: 0.14.1
    • Fix Version/s: 0.15.0
    • Component/s: 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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              • Assignee:
                apitrou Antoine Pitrou
                Reporter:
                apitrou Antoine Pitrou
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