From d84bf6d44dcac8cf8babb6ddce05cbc8f76db24c Mon Sep 17 00:00:00 2001
From: =?utf8?q?Marek=20Ol=C5=A1=C3=A1k?= <maraeo@gmail.com>
Date: Wed, 23 Jun 2010 00:20:11 +0200
Subject: [PATCH] r300g: index buffer range checking

---
 src/gallium/drivers/r300/r300_render.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/gallium/drivers/r300/r300_render.c b/src/gallium/drivers/r300/r300_render.c
index 4afd124c0eb..0fd05b51ac1 100644
--- a/src/gallium/drivers/r300/r300_render.c
+++ b/src/gallium/drivers/r300/r300_render.c
@@ -508,6 +508,12 @@ static void r300_draw_range_elements(struct pipe_context* pipe,
         return;
     }
 
+    /* Index buffer range checking. */
+    if ((start + count) * indexSize > indexBuffer->width0) {
+        fprintf(stderr, "r300: Invalid index buffer range. Skipping rendering.\n");
+        return;
+    }
+
     /* Set up fallback for incompatible vertex layout if needed. */
     if (r300->incompatible_vb_layout || r300->velems->incompatible_layout) {
         r300_begin_vertex_translate(r300);
-- 
2.30.2