GDI APIs fail when large pages or VAD spanning are used

This article introduces that GDI APIs fails when large pages or Virtual Address Descriptors (VAD) spanning are used.

Original product version:   Windows
Original KB number:   4567569

When large page sizes are configured for virtual memory allocations and/or when buffers spanning multiple VAD are passed to the GDI APIs listed below, the function calls fail.


VAD-spanning can occur if memory management facilities such as heap managers and/or garbage collectors request contiguous virtual address ranges(each of which has its own VAD), but attempts to use them as a single block of memory.