From 1000b74f2db935b0125a9765d726809be9c18a85 Mon Sep 17 00:00:00 2001
From: nattthebear <goyuken@gmail.com>
Date: Mon, 25 May 2020 08:32:43 -0400
Subject: [PATCH] tweak waterbox hash detection

A game could wild pointer into a slightly out of range part of the sealed heap during init, and then do so differently on a subsequent init, and we wouldn't detect it
---
 src/BizHawk.Emulation.Cores/Waterbox/Heap.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/BizHawk.Emulation.Cores/Waterbox/Heap.cs b/src/BizHawk.Emulation.Cores/Waterbox/Heap.cs
index 9ac0916276..bca60e01e8 100644
--- a/src/BizHawk.Emulation.Cores/Waterbox/Heap.cs
+++ b/src/BizHawk.Emulation.Cores/Waterbox/Heap.cs
@@ -73,7 +73,7 @@ namespace BizHawk.Emulation.Cores.Waterbox
 			if (!Sealed)
 			{
 				Memory.Protect(Memory.Start, Used, MemoryBlock.Protection.R);
-				_hash = WaterboxUtils.Hash(Memory.GetStream(Memory.Start, Used, false));
+				_hash = WaterboxUtils.Hash(Memory.GetStream(Memory.Start, WaterboxUtils.AlignUp(Used), false));
 				Sealed = true;
 			}
 			else