[PDFBOX-4372] Stack overflow around PDFStreamEngine.processStream

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.8.16, 2.0.12
• Fix Version/s: 1.8.17, 2.0.13, 3.0.0 PDFBox
• Component/s: PDModel
• Assignee: Tilman Hausherr
• Reporter: Tilman Hausherr
• Created: 08/Nov/18 17:18
• Updated: 02/Dec/18 17:06
• Resolved: 08/Nov/18 17:29

Description

java.lang.StackOverflowError: null
    java.lang.ref.Finalizer.<init>(Unknown Source)
    java.lang.ref.Finalizer.register(Unknown Source)
    java.lang.Object.<init>(Unknown Source)
    java.util.zip.Inflater.<init>(Unknown Source)
    org.apache.pdfbox.filter.FlateFilter.decompress(FlateFilter.java:74)
    org.apache.pdfbox.filter.FlateFilter.decode(FlateFilter.java:50)
    org.apache.pdfbox.filter.Filter.decode(Filter.java:87)
    org.apache.pdfbox.cos.COSInputStream.create(COSInputStream.java:77)
    org.apache.pdfbox.cos.COSStream.createInputStream(COSStream.java:178)
    org.apache.pdfbox.cos.COSStream.createInputStream(COSStream.java:166)
    org.apache.pdfbox.pdmodel.graphics.form.PDFormXObject.getContents(PDFormXObject.java:144)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:495)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:478)
    org.apache.pdfbox.contentstream.PDFStreamEngine.showForm(PDFStreamEngine.java:187)
    org.apache.pdfbox.contentstream.operator.graphics.DrawObject.process(DrawObject.java:70)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:853)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:506)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:478)
    org.apache.pdfbox.contentstream.PDFStreamEngine.showForm(PDFStreamEngine.java:187)
    org.apache.pdfbox.contentstream.operator.graphics.DrawObject.process(DrawObject.java:70)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:853)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:506)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:478)
    org.apache.pdfbox.contentstream.PDFStreamEngine.showForm(PDFStreamEngine.java:187)
    org.apache.pdfbox.contentstream.operator.graphics.DrawObject.process(DrawObject.java:70)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:853)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:506)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:478)
    org.apache.pdfbox.contentstream.PDFStreamEngine.showForm(PDFStreamEngine.java:187)
    org.apache.pdfbox.contentstream.operator.graphics.DrawObject.process(DrawObject.java:70)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:853)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:506)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:478)
    org.apache.pdfbox.contentstream.PDFStreamEngine.showForm(PDFStreamEngine.java:187)
    org.apache.pdfbox.contentstream.operator.graphics.DrawObject.process(DrawObject.java:70)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:853)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:506)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:478)
    org.apache.pdfbox.contentstream.PDFStreamEngine.showForm(PDFStreamEngine.java:187)
    org.apache.pdfbox.contentstream.operator.graphics.DrawObject.process(DrawObject.java:70)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:853)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:506)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:478)
    org.apache.pdfbox.contentstream.PDFStreamEngine.showForm(PDFStreamEngine.java:187)
    org.apache.pdfbox.contentstream.operator.graphics.DrawObject.process(DrawObject.java:70)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:853)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:506)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:478)
    org.apache.pdfbox.contentstream.PDFStreamEngine.showForm(PDFStreamEngine.java:187)
    org.apache.pdfbox.contentstream.operator.graphics.DrawObject.process(DrawObject.java:70)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:853)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:506)
    org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:478)
    org.apache.pdfbox.contentstream.PDFStreamEngine.showForm(PDFStreamEngine.java:187)
...

The cause is that one of the form XObjects has a resource entry but that is null. So in PDFStreamEngine the parent resources is used. This results that form Fm0, which has "/Fm0 Do", references itself.

The solution for now is to return an empty resouces instead of null when the key exists.

Issue Links

• relates to: PDFBOX-1359 stack overflow~~ ExtractText (PDF2TXT)