*
     * @see jcifs.BufferCache#releaseBuffer(byte[])
     */
    @Override
    public void releaseBuffer ( byte[] buf ) {
        if ( buf == null ) {
            return;
        }
        // better safe than sorry: prevent leaks if there is some out of bound access
        Arrays.fill(buf, (byte) 0);
        synchronized ( this.cache ) {
            if ( this.freeBuffers < this.cache.length ) {