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[Bug 1433330] Re: Some protobuf Closure objects can access dead objects

To: touch-packages@xxxxxxxxxxxxxxxxxxx
From: Daniel van Vugt <daniel.van.vugt@xxxxxxxxxxxxx>
Date: Wed, 18 Mar 2015 03:17:35 -0000
Reply-to: Bug 1433330 <1433330@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Also affects: mir (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1433330

Title:
  Some protobuf Closure objects can access dead objects

Status in Mir:
  In Progress
Status in mir package in Ubuntu:
  New

Bug description:
  ProtobufMessageProcessor::dispatch will create a protobuf closure
  object that references the ProtobufMessageProcessor "this" pointer.

  The closure/callback object may be invoked by a different thread (e.g.
  SessionMediator::exchange_buffer). Since there's no protection there
  can be a race between dropping a connection (which destroys the
  ProtoBufMessageProcessor) and the callback being invoked by a
  compositor thread.

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