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  1. Core Server
  2. SERVER-28799

Don't dereference the boost::optional<MigrationSessionId> maintained by MigrationDestinationManager unless it is known to be set

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Details

    • Bug
    • Status: Closed
    • Major - P3
    • Resolution: Fixed
    • None
    • 3.5.6
    • Sharding
    • None
    • Fully Compatible
    • ALL
    • Sharding 2017-05-08
    • 0

    Description

      Discovered in BF-5146 fuzzer test. We can dereference MigrationDestionationManager::_sessionId, a boost::optional<MigrationSessionId>, when it is unset: https://github.com/mongodb/mongo/blob/ed80d2d3c5735c424e5c1cd58169077327976d2e/src/mongo/db/s/migration_destination_manager.cpp#L356

      Backports are not needed, as the log message in which _sessionId is dereferenced is new as of v3.5

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            dianna.hohensee@mongodb.com Dianna Hohensee
            dianna.hohensee@mongodb.com Dianna Hohensee
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              Created:
              Updated:
              Resolved: