[PATCH 0/6] MR8878: ntdll: Avoid deadlock on SIGPIPE while holding virtual_mutex or fd_cache_mutex.

[Rémi Bernon (＠rbernon)]

This manifested with https://gitlab.winehq.org/wine/wine/-/merge_requests/8875, as it adds fd_cache_mutex lock on thread init to receive the new inproc sync file descriptors. The kernel32:sync test creates a thread then immediately terminates it, which causes wineserver to close its pipe while it is initializing, triggering a SIGPIPE that is receive while the thread is within the server_init_thread call and request.