From: Roger Zoellner Subject: [PATCH] ntdll: Workaround for requesting thread affinity mask that isn't a subset of the system's mask Message-Id: <20180908132618.3910-1-zoellner.roger@gmail.com> Date: Sat, 8 Sep 2018 15:26:18 +0200 This patch is related to the game 'Divinity Original Sin 2' which crashes on startup, if the system only has 4 or less logical cpus. By Microsoft specification, requesting a thread affinity mask requires it be be a subset of the process affiniy mask. However the game requests a mask F...FE (-2) which makes wine to return STATUS_INVALID_PARAMETER, which in turn makes the game hang. This patch will make wine to adjust the mask in this case, which makes the game start correctly. Signed-off-by: Roger Zoellner --- dlls/ntdll/thread.c | 1 + 1 file changed, 1 insertion(+) diff --git a/dlls/ntdll/thread.c b/dlls/ntdll/thread.c index 59d64e174d..6beb8c1a3d 100644 --- a/dlls/ntdll/thread.c +++ b/dlls/ntdll/thread.c @@ -1290,6 +1290,7 @@ NTSTATUS WINAPI NtSetInformationThread( HANDLE handle, THREADINFOCLASS class, if (length != sizeof(ULONG_PTR)) return STATUS_INVALID_PARAMETER; req_aff = *(const ULONG_PTR *)data; if ((ULONG)req_aff == ~0u) req_aff = affinity_mask; + else if ((LONG) req_aff < 0) req_aff = affinity_mask & req_aff; else if (req_aff & ~affinity_mask) return STATUS_INVALID_PARAMETER; else if (!req_aff) return STATUS_INVALID_PARAMETER; SERVER_START_REQ( set_thread_info ) -- 2.18.0