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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

    • Type: Bug
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 3.5.6
    • Component/s: Sharding
    • Labels:
      None
    • Backwards Compatibility:
      Fully Compatible
    • Operating System:
      ALL
    • Sprint:
      Sharding 2017-05-08
    • Linked BF Score:
      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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            Assignee:
            dianna.hohensee Dianna Hohensee
            Reporter:
            dianna.hohensee Dianna Hohensee
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              Updated:
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