[Bug 60554] New: Continuum 0.40 hangs with 100% CPU when joining a zone

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=60554

            Bug ID: 60554
           Summary: Continuum 0.40 hangs with 100% CPU when joining a zone
           Product: Wine
           Version: 6.15
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: advapi32
          Assignee: [e-mail]
          Reporter: [e-mail]
  Target Milestone: ---
      Distribution: ---

Created attachment 82421
  --> http://bugs.winehq.org/attachment.cgi?id=82421
terminal output

Continuum 0.40 installs and starts fine and shows the zone list. As soon as you
join a zone, the window stops responding and Continuum.exe uses 100% of one CPU
core.

Steps to reproduce:

1. Download
https://www.getcontinuum.com/downloads/continuum/Continuum040Setup.zip and
unzip it.
   SHA1 of the zip: d95283d34d9a88eadbc4566abd0a411fb9da8953
(Continuum040Setup.zip)
   SHA1 of the installer: c98e42a92b1f2c3233bf89d597cb22b0162b2668
(Continuum040Setup.exe)
2. `wine Continuum040Setup.exe` and accept the defaults.
3. Start Continuum.exe, create or log in with a user name, select any zone and
click Play.

Analysis: when entering a zone, the client enumerates the registry. Opening
HKLM\Software\Microsoft\Windows NT\CurrentVersion\Perflib\009 returns the
pseudo-handle HKEY_PERFORMANCE_TEXT (0x80000050). RegEnumValueA() on that
handle returns ERROR_INVALID_HANDLE for every index, and Continuum only stops
on ERROR_NO_MORE_ITEMS, so it keeps incrementing the index forever (see the
attached relay log: about 3 million calls before the log was stopped). The
todo_wine tests in test_performance_keys() (dlls/advapi32/tests/registry.c)
expect ERROR_MORE_DATA from RegEnumValueA() and ERROR_NO_MORE_ITEMS from
RegEnumKeyA() on these handles.

Regression note: not bisected. The handle has been returned since 1ab13117081
("kernelbase: Return HKEY_PERFORMANCE_TEXT when trying to open the Perflib\009
key.", wine-6.15). This matches ProtonDB reports, where Proton 5.13 works and
later versions hang when joining a server.

Tested on Ubuntu 22.04 x86_64 with wine-11.20 built from the release tag, in a
clean prefix with a fresh install, and earlier with wine-11.0 from the WineHQ
stable packages. It hangs in both. The terminal output only contains a few
fixme lines (attached).

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[Bug 60554] Continuum 0.40 hangs with 100% CPU when joining a zone

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=60554

--- Comment #1 from [e-mail] ---
Created attachment 82422
  --> http://bugs.winehq.org/attachment.cgi?id=82422
relay log excerpt (registry calls)

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[Bug 60554] Continuum 0.40 hangs with 100% CPU when joining a zone

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=60554

[e-mail] changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
    Regression SHA1|                            |1ab13117081d7d7eca74ca724e3
                   |                            |9a41583b78fda
           Keywords|                            |download, regression

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