Skip to content

gh-159118: Use MTA COM initialization in _wmi to avoid crashes under load #159463

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
utam-1 wants to merge 1 commit into
base: main
Choose a base branch
from
Open

gh-159118: Use MTA COM initialization in _wmi to avoid crashes under load #159463

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
gh-159118: Use MTA COM initialization in _wmi to avoid crashes under … 
…load

Initialize COM with COINIT_MULTITHREADED instead of COINIT_APARTMENTTHREADED in _wmimodule.cpp to prevent hidden window registration contention and RPC_NT_INTERNAL_ERROR crashes under high concurrency.
  • Loading branch information
@utam-1
utam-1 committed Oct 15, 2026
commit 3ad4bef38b5b459f9cd85b18aa8a569bdc8be452
1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Windows/2026-10-15-18-45-00.gh-issue-159118.wmiMTA.rst
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Fix a crash (``RPC_NT_INTERNAL_ERROR``) and intermittent window class failures in :mod:`!_wmi` under high concurrency and load by initializing COM as multi-threaded (MTA) instead of apartment-threaded (STA).
2 changes: 1 addition & 1 deletion PC/_wmimodule.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -67,7 +67,7 @@ _query_thread(LPVOID param)
}

if (SUCCEEDED(hr)) {
hr = CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED);
hr = CoInitializeEx(nullptr, COINIT_MULTITHREADED);
}

if (FAILED(hr)) {
Expand Down
Loading