Antoine Pitrou created ARROW-6572:
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Summary: [C++] Reading some Parquet data can return uninitialized
memory
Key: ARROW-6572
URL: https://issues.apache.org/jira/browse/ARROW-6572
Project: Apache Arrow
Issue Type: Bug
Components: C++
Affects Versions: 0.14.1
Reporter: Antoine Pitrou
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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