From ec04a959294b166a7f6216fc2170d8a46958c5ca Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <coelckers@users.noreply.github.com>
Date: Fri, 27 Jan 2023 18:25:13 +0100
Subject: [PATCH] - validate the buffer size in HWViewpointBuffer::Set2D.

This was causing crashes in Dragon Sector when writing past the buffer's end.
---
 src/common/rendering/hwrenderer/data/hw_viewpointbuffer.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/common/rendering/hwrenderer/data/hw_viewpointbuffer.cpp b/src/common/rendering/hwrenderer/data/hw_viewpointbuffer.cpp
index 3d67b46be..471ee1cb6 100644
--- a/src/common/rendering/hwrenderer/data/hw_viewpointbuffer.cpp
+++ b/src/common/rendering/hwrenderer/data/hw_viewpointbuffer.cpp
@@ -96,6 +96,7 @@ void HWViewpointBuffer::Set2D(FRenderState &di, int width, int height, int pll)
 	matrices.mProjectionMatrix.ortho(0, (float)width, (float)height, 0, -1.0f, 1.0f);
 	matrices.CalcDependencies();
 
+	CheckSize();
 	mBuffer->Map();
 	memcpy(((char*)mBuffer->Memory()) + mUploadIndex * mBlockAlign, &matrices, sizeof(matrices));
 	mBuffer->Unmap();