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Posted to dev@arrow.apache.org by "Yibo Cai (Jira)" <ji...@apache.org> on 2020/05/07 09:56:00 UTC

[jira] [Created] (ARROW-8728) [C++] Bitmap operation may cause buffer overflow

Yibo Cai created ARROW-8728:
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             Summary: [C++]  Bitmap operation may cause buffer overflow
                 Key: ARROW-8728
                 URL: https://issues.apache.org/jira/browse/ARROW-8728
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++
            Reporter: Yibo Cai
            Assignee: Yibo Cai


Happen to find this issue when refining bitmap operation,  [this code|https://github.com/apache/arrow/blob/9b75a60658327c39383bee48fa6e5827faf2ced3/cpp/src/arrow/util/bit_util.cc#L267] may overflow out buffer. Should be "(length + left_offset % 8)";
Improve unit test to test large offset values can trigger the bug.



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