void FeatureInfo::EnableOESTextureHalfFloatLinear() {
  if (!oes_texture_half_float_linear_available_)
     return;
   AddExtensionString("GL_OES_texture_half_float_linear");
   feature_flags_.enable_texture_half_float_linear = true;

  // TODO(capn) : Re-enable this once we have ANGLE+SwiftShader supporting
  // IOSurfaces.
  if (workarounds_.disable_half_float_for_gmb)
    return;
   feature_flags_.gpu_memory_buffer_formats.Add(gfx::BufferFormat::RGBA_F16);
 }

The product reads data past the end, or before the beginning, of the intended buffer.