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https://issues.apache.org/jira/browse/SPARK-22997?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Josh Rosen resolved SPARK-22997.
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Resolution: Fixed
Fix Version/s: 2.3.0
Fixed for 2.3.0.
> Add additional defenses against use of freed MemoryBlocks
> ---------------------------------------------------------
>
> Key: SPARK-22997
> URL: https://issues.apache.org/jira/browse/SPARK-22997
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 2.3.0
> Reporter: Josh Rosen
> Assignee: Josh Rosen
> Fix For: 2.3.0
>
>
> We can add additional assertions to Spark's {{MemoryAllocator}} classes in
> order to guard against a class of dangerous use-after-free bugs (which could
> cause segfaults or data corruption).
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