[viogpu] Initialize uninitialized members to prevent undefined behavior

- Zero m_SystemDisplayInfo in VioGpuDod::VioGpuDod()
- Initialize m_u64HostFeatures / m_u64GuestFeatures in VioGpuAdapter::VioGpuAdapter()
- Initialize CSessionMgr::m_hThread to NULL

Signed-off-by: Elizabeth Ashurov <eashurov@redhat.com>

Author: elizashurov

viogpu/viogpudo/viogpudo.cpp

@@ -53,6 +53,7 @@ VioGpuDod::VioGpuDod(_In_ DEVICE_OBJECT *pPhysicalDeviceObject)
     RtlZeroMemory(&m_DxgkInterface, sizeof(m_DxgkInterface));
     RtlZeroMemory(&m_DeviceInfo, sizeof(m_DeviceInfo));
     RtlZeroMemory(&m_CurrentMode, sizeof(m_CurrentMode));
+    RtlZeroMemory(&m_SystemDisplayInfo, sizeof(m_SystemDisplayInfo));
     RtlZeroMemory(&m_PointerShape, sizeof(m_PointerShape));
     DbgPrint(TRACE_LEVEL_VERBOSE, ("<--- %s\n", __FUNCTION__));
 }
@@ -2191,6 +2192,8 @@ VioGpuAdapter::VioGpuAdapter(_In_ VioGpuDod *pVioGpuDod)
     m_pWorkThread = NULL;
     m_ResolutionEvent = NULL;
     m_ResolutionEventHandle = NULL;
+    m_u64HostFeatures = 0;
+    m_u64GuestFeatures = 0;
     m_u32NumCapsets = 0;
     m_u32NumScanouts = 0;
 

viogpu/viogpusc/SessionMgr.cpp

@@ -31,7 +31,7 @@
 #include "SessionMgr.h"
 #include "Session.h"
 
-CSessionMgr::CSessionMgr()
+CSessionMgr::CSessionMgr() : m_hThread(NULL)
 {
     PrintMessage(L"%ws\n", __FUNCTIONW__);
 }