From d2c3f41e1e2b762685cf29dd02d356ccc7663376 Mon Sep 17 00:00:00 2001
From: Ansariel <none@none>
Date: Fri, 17 Jul 2015 12:08:09 +0200
Subject: [PATCH] Crash fix due to invalid calls to drawElements by Drake
 Arconis

---
 indra/llrender/llvertexbuffer.cpp    | 8 ++++++++
 indra/newview/llspatialpartition.cpp | 5 ++++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/indra/llrender/llvertexbuffer.cpp b/indra/llrender/llvertexbuffer.cpp
index 360a41e651..3bbd79d457 100755
--- a/indra/llrender/llvertexbuffer.cpp
+++ b/indra/llrender/llvertexbuffer.cpp
@@ -616,6 +616,14 @@ void LLVertexBuffer::drawElements(U32 mode, const LLVector4a* pos, const LLVecto
 {
 	llassert(!LLGLSLShader::sNoFixedFunction || LLGLSLShader::sCurBoundShaderPtr != NULL);
 
+	// <FS:Ansariel> Crash fix due to invalid calls to drawElements by Drake Arconis
+	if (num_indices <= 0)
+	{
+		LL_WARNS() << "Called drawElements with 0 indices" << LL_ENDL;
+		return;
+	}
+	// </FS:Ansariel>
+
 	gGL.syncMatrices();
 
 	U32 mask = LLVertexBuffer::MAP_VERTEX;
diff --git a/indra/newview/llspatialpartition.cpp b/indra/newview/llspatialpartition.cpp
index f909305e1d..cfac7c04bf 100755
--- a/indra/newview/llspatialpartition.cpp
+++ b/indra/newview/llspatialpartition.cpp
@@ -2514,7 +2514,10 @@ void renderPhysicsShape(LLDrawable* drawable, LLVOVolume* volume)
 				}
 			}
 
-			if (phys_volume->mHullPoints)
+			// <FS:Ansariel> Crash fix due to invalid calls to drawElements by Drake Arconis
+			//if (phys_volume->mHullPoints)
+			if (phys_volume->mHullPoints && phys_volume->mHullIndices && phys_volume->mNumHullPoints > 0 && phys_volume->mNumHullIndices > 0)
+			// </FS:Ansariel>
 			{
 				//render hull