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76c23f9e0d
Take care not to dereference BlockEntry if it may be pointing past the end of the page table we are manipulating. It is only a read, and thus harmless, but HeapGuard triggers on it so let's fix it. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>