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https://issues.apache.org/jira/browse/PROTON-1538?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Justin Ross resolved PROTON-1538.
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Resolution: Fixed
> Epoll proactor unguarded memory access
> --------------------------------------
>
> Key: PROTON-1538
> URL: https://issues.apache.org/jira/browse/PROTON-1538
> Project: Qpid Proton
> Issue Type: Bug
> Components: proton-c
> Affects Versions: proton-c-0.18.0
> Reporter: Cliff Jansen
> Assignee: Cliff Jansen
> Fix For: proton-c-0.18.0
>
>
> ThreadSanitizer singled out the epoll_event for network sockets to be a risk
> of out of order access by multiple threads.
> On inspection it is possible that two threads could try rearming the socket
> out of order, allowing the wrong events of interest to be registered.
> Reusing the existing connection context mutex would be costly for
> guarding this since the system call is frequent and relatively long
> compared to other acquisitions of the mutex. Adding a new mutex that
> guards this operation should fix things with negligible performance
> cost.
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