Created attachment 35141 [details]
triggering file

I need to figure out if this is a POIFs bug or a parseSummaries bug.  This is triggered by a corrupted file.

At this location:
	  at org.apache.poi.util.IOUtils.copy(IOUtils.java:296)
	  at org.apache.poi.util.IOUtils.peekFirstNBytes(IOUtils.java:64)
	  at org.apache.poi.hpsf.PropertySet.isPropertySetStream(PropertySet.java:393)
	  at org.apache.poi.hpsf.PropertySet.<init>(PropertySet.java:191)
	  at org.apache.tika.parser.microsoft.SummaryExtractor.parseSummaryEntryIfExists(SummaryExtractor.java:83)
	  at org.apache.tika.parser.microsoft.SummaryExtractor.parseSummaries(SummaryExtractor.java:73)

        while((count = inp.read(buff)) != -1) {
            if(count > 0) {
                out.write(buff, 0, count);
            }
        }

On the first iteration, the pos in inp is 0, but then the pos goes negative on each iteration, and this loop iterates for a very long time.

The source file that I corrupted is: testEXCEL_embeddedPDF_windows.xls