[Bug 52414] New: Mount and Blade II: Bannerlord sometimes fails to exit with repeated "Async read operation failed 6" message boxes

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52414

Bug ID: 52414
           Summary: Mount and Blade II: Bannerlord sometimes fails to exit
                    with repeated "Async read operation failed 6" message
                    boxes
           Product: Wine
           Version: 6.3
          Hardware: x86-64
                OS: Linux
            Status: NEW
          Keywords: patch
          Severity: normal
          Priority: P2
         Component: wineserver
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

The problem was diagnosed by Andrew Eikum.

The game calls NtRemoveIoCompletion() with an infinite timeout from one thread,
and from another posts a message and then immediately closes the port. It
expects NtRemoveIoCompletion() to return success. In Wine this may result in a
race where the select request returns STATUS_SUCCESS but the subsequent
remove_completion request returns STATUS_INVALID_HANDLE, triggering the "6"
(i.e. ERROR_INVALID_HANDLE) message.

Paul Gofman sent a patch series [1] to essentially keep the completion handle
open while NtRemoveIoCompletion is executing, but it was sent close to code
freeze and fell off the list without review.

[1] https://www.winehq.org/pipermail/wine-devel/2021-December/202655.html