From 7cfa28a6664fa79b5b12341a93e995d74cb0deef Mon Sep 17 00:00:00 2001
From: Fernando Sahmkow <fsahmkow27@gmail.com>
Date: Sat, 2 Apr 2022 22:38:58 +0200
Subject: Memory Manager: ensure safety of GPU to CPU address.

---
 src/video_core/memory_manager.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/video_core/memory_manager.cpp b/src/video_core/memory_manager.cpp
index 0f97db272..4e52ce0fd 100644
--- a/src/video_core/memory_manager.cpp
+++ b/src/video_core/memory_manager.cpp
@@ -193,6 +193,9 @@ void MemoryManager::Unmap(GPUVAddr gpu_addr, std::size_t size) {
 }
 
 std::optional<VAddr> MemoryManager::GpuToCpuAddress(GPUVAddr gpu_addr) const {
+    if (gpu_addr >= address_space_size) [[unlikely]] {
+        return std::nullopt;
+    }
     if (GetEntry<true>(gpu_addr) != EntryType::Mapped) [[unlikely]] {
         if (GetEntry<false>(gpu_addr) != EntryType::Mapped) {
             return std::nullopt;
-- 
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