From c5a2df90a2b8057717974bc224c113bd03018c58 Mon Sep 17 00:00:00 2001
From: David Riley <driley@moonfall.com>
Date: Thu, 25 Apr 2019 12:55:03 -0700
Subject: [PATCH] vrend: Avoid potential null dereference when drawing with
 indexed buffer

Signed-off-by: David Riley <davidriley@chromium.org>
Reviewed-By: Gert Wollny <gert.wollny@collabora.com>
---
 src/vrend_renderer.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/vrend_renderer.c b/src/vrend_renderer.c
index 5f3d091..f0b9a21 100644
--- a/src/vrend_renderer.c
+++ b/src/vrend_renderer.c
@@ -4264,6 +4264,10 @@ int vrend_draw_vbo(struct vrend_context *ctx,
 
    if (info->indexed) {
       struct vrend_resource *res = (struct vrend_resource *)ctx->sub->ib.buffer;
+      if (!res) {
+         vrend_printf( "VBO missing indexed array buffer\n");
+         return 0;
+      }
       glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, res->id);
    } else
       glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);