From 5d96124af6fee0ae99ccbb0cb5f05b4550dccdb4 Mon Sep 17 00:00:00 2001
From: Mark Riedesel <mark@klowner.com>
Date: Sat, 16 Oct 2021 14:21:46 -0400
Subject: [PATCH] Add check to SurfaceTool.generate_lod(); ensure target index
 count between 0 and source index count. Fixes #53876

---
 scene/resources/surface_tool.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/scene/resources/surface_tool.cpp b/scene/resources/surface_tool.cpp
index a8cd872408..455af8a40c 100644
--- a/scene/resources/surface_tool.cpp
+++ b/scene/resources/surface_tool.cpp
@@ -1174,9 +1174,11 @@ Vector<int> SurfaceTool::generate_lod(float p_threshold, int p_target_index_coun
 	Vector<int> lod;
 
 	ERR_FAIL_COND_V(simplify_func == nullptr, lod);
+	ERR_FAIL_COND_V(p_target_index_count < 0, lod);
 	ERR_FAIL_COND_V(vertex_array.size() == 0, lod);
 	ERR_FAIL_COND_V(index_array.size() == 0, lod);
 	ERR_FAIL_COND_V(index_array.size() % 3 != 0, lod);
+	ERR_FAIL_COND_V(index_array.size() < (unsigned int)p_target_index_count, lod);
 
 	lod.resize(index_array.size());
 	LocalVector<float> vertices; //uses floats