check for invalid mode in glBegin(), bug 7142

diff --git a/src/mesa/tnl/t_vtx_api.c b/src/mesa/tnl/t_vtx_api.c
index ed06889..4765228 100644 (file)
--- a/src/mesa/tnl/t_vtx_api.c
+++ b/src/mesa/tnl/t_vtx_api.c
@@ -740,6 +740,11 @@ static void GLAPIENTRY _tnl_Begin( GLenum mode )
 {
    GET_CURRENT_CONTEXT( ctx ); 
 
+   if (mode > GL_POLYGON) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glBegin(mode)");
+      return;
+   }
+
    if (ctx->Driver.CurrentExecPrimitive == PRIM_OUTSIDE_BEGIN_END) {
       /* we're not inside a glBegin/End pair */
       TNLcontext *tnl = TNL_CONTEXT(ctx);