[SPARK-22997] Add additional defenses against use of freed MemoryBlocks

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.0
• Fix Version/s: 2.3.0
• Component/s: Spark Core
• Target Version/s: 2.3.0
• Assignee: Josh Rosen
• Reporter: Josh Rosen
• Created: 08/Jan/18 23:47
• Updated: 10/Jan/18 08:47
• Resolved: 10/Jan/18 08:47

Description

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).

Issue Links

• links to: [Github] Pull Request #20191 (JoshRosen)