static MagickBooleanType ReadPSDLayer(Image *image,const ImageInfo *image_info,
  const PSDInfo *psd_info,LayerInfo* layer_info,ExceptionInfo *exception)
{
  char
    message[MagickPathExtent];

  MagickBooleanType
    status;

  PSDCompressionType
    compression;

  ssize_t
    j;

  if (image->debug != MagickFalse)
    (void) LogMagickEvent(CoderEvent,GetMagickModule(),
      "    setting up new layer image");
  if (psd_info->mode != IndexedMode)
    (void) SetImageBackgroundColor(layer_info->image,exception);
  layer_info->image->compose=PSDBlendModeToCompositeOperator(
    layer_info->blendkey);
  if (layer_info->visible == MagickFalse)
    layer_info->image->compose=NoCompositeOp;
  if (psd_info->mode == CMYKMode)
    SetImageColorspace(layer_info->image,CMYKColorspace,exception);
  else if ((psd_info->mode == BitmapMode) || (psd_info->mode == DuotoneMode) ||
           (psd_info->mode == GrayscaleMode))
    SetImageColorspace(layer_info->image,GRAYColorspace,exception);
  /*
    Set up some hidden attributes for folks that need them.
  */
  (void) FormatLocaleString(message,MagickPathExtent,"%.20g",
    (double) layer_info->page.x);
  (void) SetImageArtifact(layer_info->image,"psd:layer.x",message);
  (void) FormatLocaleString(message,MagickPathExtent,"%.20g",
    (double) layer_info->page.y);
  (void) SetImageArtifact(layer_info->image,"psd:layer.y",message);
  (void) FormatLocaleString(message,MagickPathExtent,"%.20g",(double)
    layer_info->opacity);
  (void) SetImageArtifact(layer_info->image,"psd:layer.opacity",message);
  (void) SetImageProperty(layer_info->image,"label",(char *) layer_info->name,
    exception);

  status=MagickTrue;
  for (j=0; j < (ssize_t) layer_info->channels; j++)
  {
    if (image->debug != MagickFalse)
      (void) LogMagickEvent(CoderEvent,GetMagickModule(),
        "    reading data for channel %.20g",(double) j);

    compression=(PSDCompressionType) ReadBlobShort(layer_info->image);
    layer_info->image->compression=ConvertPSDCompression(compression);
    if (layer_info->channel_info[j].type == -1)
      layer_info->image->alpha_trait=BlendPixelTrait;

    status=ReadPSDChannel(layer_info->image,image_info,psd_info,layer_info,j,
      compression,exception);

    if (status == MagickFalse)
      break;
  }

  if (status != MagickFalse)
    status=ApplyPSDLayerOpacity(layer_info->image,layer_info->opacity,
      MagickFalse,exception);

  if ((status != MagickFalse) &&
      (layer_info->image->colorspace == CMYKColorspace))
    status=NegateCMYK(layer_info->image,exception);

  if ((status != MagickFalse) && (layer_info->mask.image != (Image *) NULL))
    {
      const char
        *option;
      
      layer_info->mask.image->page.x=layer_info->mask.page.x;
      layer_info->mask.image->page.y=layer_info->mask.page.y;
      /* Do not composite the mask when it is disabled */
      if ((layer_info->mask.flags & 0x02) == 0x02)
        layer_info->mask.image->compose=NoCompositeOp;
      else
        status=ApplyPSDOpacityMask(layer_info->image,layer_info->mask.image,
          layer_info->mask.background == 0 ? 0 : QuantumRange,MagickFalse,
          exception);
      option=GetImageOption(image_info,"psd:preserve-opacity-mask");
      if (IsStringTrue(option) != MagickFalse)
        PreservePSDOpacityMask(image,layer_info,exception);
      layer_info->mask.image=DestroyImage(layer_info->mask.image);
    }

  return(status);
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.