[CASSANDRA-2951] FreeableMemory can be accessed after it is invalid

• Type: Bug
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 0.8.3
• Severity: Low
• Assignee: Jonathan Ellis
• Reporter: Jonathan Ellis

Authors

Jonathan Ellis

Reviewers

Sylvain Lebresne

• Created: 26/Jul/11 22:02
• Updated: 16/Apr/19 09:32
• Resolved: 27/Jul/11 20:58

Description

SerializingCache.get looks like this:

    public V get(Object key)
    {
        FreeableMemory mem = map.get(key);
        if (mem == null)
            return null;
        return deserialize(mem);
    }

If a cache object is evicted or replaced after the get happens, but before deserialize completes, we will trigger an assertion failure (if asserts are enabled) or segfault (if they are not).