[PDFBOX-5313] `NullPointerException` when intersecting area with null clipping path

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.0.24
• Fix Version/s: 2.0.25, 3.0.0 PDFBox
• Component/s: Rendering
• Assignee: Tilman Hausherr
• Reporter: Henry Iguaro
• Created: 05/Nov/21 02:29
• Updated: 17/Dec/21 06:50
• Resolved: 05/Nov/21 18:05

Description

Hey guys!

We got a PDF that manages to trigger the following NPE from PageDrawer:

 

 
java.lang.NullPointerException: null
 at java.desktop/java.awt.geom.Area.<init>(Area.java:126)
 at org.apache.pdfbox.rendering.PageDrawer.fillPath(PageDrawer.java:900)
 at org.apache.pdfbox.contentstream.operator.graphics.FillNonZeroRule.process(FillNonZeroRule.java:37)
 at org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:933)
 

 

The file even breaks on pdf-debugger (it fails to render).
 
Unfortunately, I can’t share the file.

Looking at the documentation for Graphics.getClip(), it mentions that the result can be null, and if null is passed to the Area constructor this ends up in a NullPointerException. Further studying the PageDrawer code, it seems that graphics.getClip() shouldn't return null, however, we proposed a small fix in the following PR that seems to do the trick:

https://github.com/apache/pdfbox/pull/133