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https://issues.apache.org/jira/browse/DERBY-2935?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Knut Anders Hatlen updated DERBY-2935:
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Attachment: test.diff
Attaching a test which uses 8 bytes for the length. The test passes both with
and without the fix. I'm only attaching it in case someone wants to experiment
with it to find ways to expose the bug.
> DDMReader.readLengthAndCodePoint() decodes long integer incorrectly
> -------------------------------------------------------------------
>
> Key: DERBY-2935
> URL: https://issues.apache.org/jira/browse/DERBY-2935
> Project: Derby
> Issue Type: Bug
> Components: Network Server
> Affects Versions: 10.1.3.1, 10.2.2.0, 10.3.1.1, 10.4.0.0
> Reporter: Knut Anders Hatlen
> Assignee: Knut Anders Hatlen
> Priority: Minor
> Attachments: decode-long.diff, test.diff
>
>
> DDMReader.readLengthAndCodePoint() contains code to decode a long integer
> from a byte array. This code is broken since it uses int operations and not
> long operations in the decoding. The long might be encoded using four, six or
> eight bytes, and since Derby currently always uses the four bytes encoding,
> the bug is not exposed in the current code.
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