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Posted to issues@arrow.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2019/09/16 15:34:00 UTC
[jira] [Updated] (ARROW-6572) [C++] Reading some Parquet data can
return uninitialized memory
[ https://issues.apache.org/jira/browse/ARROW-6572?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated ARROW-6572:
----------------------------------
Labels: pull-request-available (was: )
> [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
> Assignee: Antoine Pitrou
> Priority: Critical
> Labels: pull-request-available
>
> 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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