From fa92756400ccfbb3f0201df634feb45ab4f98352 Mon Sep 17 00:00:00 2001
From: Brian Paul <brianp@vmware.com>
Date: Wed, 22 Apr 2009 18:16:03 +0100
Subject: mesa: Fix buffer overflow when parsing generic vertex attributes.

---
 src/mesa/shader/arbprogparse.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

(limited to 'src/mesa/shader/arbprogparse.c')

diff --git a/src/mesa/shader/arbprogparse.c b/src/mesa/shader/arbprogparse.c
index b47bf360cf..c7a031067e 100644
--- a/src/mesa/shader/arbprogparse.c
+++ b/src/mesa/shader/arbprogparse.c
@@ -1513,10 +1513,16 @@ generic_attrib_check(struct var_cache *vc_head)
    curr = vc_head;
    while (curr) {
       if (curr->type == vt_attrib) {
-         if (curr->attrib_is_generic)
-            genericAttrib[ curr->attrib_binding ] = GL_TRUE;
-         else
+         if (curr->attrib_is_generic) {
+            GLuint attr = (curr->attrib_binding == 0)
+               ? 0 : (curr->attrib_binding - VERT_ATTRIB_GENERIC0);
+            assert(attr < MAX_VERTEX_PROGRAM_ATTRIBS);
+            genericAttrib[attr] = GL_TRUE;
+         }
+         else {
+            assert(curr->attrib_binding < MAX_VERTEX_PROGRAM_ATTRIBS);
             explicitAttrib[ curr->attrib_binding ] = GL_TRUE;
+         }
       }
 
       curr = curr->next;
-- 
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