From: Marek Olšák <maraeo@gmail.com>
Date: Tue, 22 Jun 2010 22:20:11 +0000 (+0200)
Subject: r300g: index buffer range checking
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d84bf6d44dcac8cf8babb6ddce05cbc8f76db24c;p=mesa.git

r300g: index buffer range checking
---

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);