Cherry-pick of an upstream patch:
https://github.com/glmark2/glmark2/commit/b779dc4479e701c61c777e544706c09e4b525267

This fixes writing/reading out of bounds of a stack-allocated array.

From b779dc4479e701c61c777e544706c09e4b525267 Mon Sep 17 00:00:00 2001
From: Alexandros Frantzis <alexandros.frantzis@collabora.com>
Date: Fri, 8 Sep 2017 09:52:11 +0300
Subject: [PATCH] SceneTerrain: Fix off-by-one error in array size

Fixes #38
---
 src/scene-terrain/blur-renderer.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/scene-terrain/blur-renderer.cpp b/src/scene-terrain/blur-renderer.cpp
index b4bc913..96c3696 100644
--- a/src/scene-terrain/blur-renderer.cpp
+++ b/src/scene-terrain/blur-renderer.cpp
@@ -84,7 +84,7 @@ create_blur_shaders(ShaderSource& vtx_source, ShaderSource& frg_source,
         sigma = 1.0;
 
     unsigned int side = 2 * radius + 1;
-    float values[radius];
+    float values[radius + 1];
     float sum = 0.0;
 
     for (unsigned int i = 0; i < radius + 1; i++) {