From 3d671cba100e1e7f9f19ae43f33ebeba7fbd7a24 Mon Sep 17 00:00:00 2001
From: Ryan Houdek <Sonicadvance1@gmail.com>
Date: Wed, 21 Feb 2024 15:37:46 -0800
Subject: [PATCH] Allocator: Early return if past the end of the allocation
 range

Fixes a bug where it would eventually hit the stack region and remap the
range as RW even for ranges that don't overlap the stack.
---
 FEXCore/Source/Utils/Allocator.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/FEXCore/Source/Utils/Allocator.cpp b/FEXCore/Source/Utils/Allocator.cpp
index b4a4d5538..d3b7066f6 100644
--- a/FEXCore/Source/Utils/Allocator.cpp
+++ b/FEXCore/Source/Utils/Allocator.cpp
@@ -297,6 +297,12 @@ namespace FEXCore::Allocator {
         if (c == ' ') {
           STEAL_LOG("[%d] ParseEnd; RegionBegin: %016lX RegionEnd: %016lX\n", __LINE__, RegionBegin, RegionEnd);
 
+          if (RegionEnd >= End) {
+            // Early return if we are completely beyond the allocation space.
+            close(MapsFD);
+            return Regions;
+          }
+
           State = ScanEnd;
 
           // If the previous map's ending and the region we just parsed overlap the stack then we need to save the stack mapping.