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https://issues.apache.org/jira/browse/MATH-679?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Luc Maisonobe resolved MATH-679.
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Resolution: Fixed
Fix Version/s: 3.0
Fixed in subversion repository as of r1181181.
Thanks for the report and the workaround.
> Integer overflow in OpenMapRealMatrix
> -------------------------------------
>
> Key: MATH-679
> URL: https://issues.apache.org/jira/browse/MATH-679
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 2.2
> Reporter: Christopher Berner
> Priority: Minor
> Fix For: 3.0
>
> Attachments: Flaw.java
>
>
> computeKey() has an integer overflow. Since it is a sparse matrix, this is
> quite easily encountered long before heap space is exhausted. The attached
> code demonstrates the problem, which could potentially be a security
> vulnerability (for example, if one was to use this matrix to store access
> control information).
> Workaround: never create an OpenMapRealMatrix with more cells than are
> addressable with an int.
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