Harden against PEB stomping in UM

[stevemk14ebr]

• Usermode reads should use

  STrace/C/STrace/DynamicTrace.cpp

  Line 5 in 7e2d56c

  extern "C" __declspec(dllexport) __declspec(noinline) BOOLEAN TraceAccessMemory(PVOID SafeAddress, ULONG_PTR UnsafeAddress, SIZE_T NumberOfBytes, SIZE_T ChunkSize, BOOLEAN DoRead)

  or at least ProbeForRead to restrict addresses we read to UM and catch with __try __except if they're invalid addresses.

• Guard against PEB / Module lists stomping. Cycles can be created not including the list head/end causing infinite loops in the module walks

[stevemk14ebr]

58547f0 fixes the first issue by using Se api