Tilman Hausherr created PDFBOX-2478:
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Summary: NPE in XObjImageValidator.checkColorSpaceAndImageMask
Key: PDFBOX-2478
URL: https://issues.apache.org/jira/browse/PDFBOX-2478
Project: PDFBox
Issue Type: Bug
Components: Preflight
Affects Versions: 1.8.7, 1.8.8, 2.0.0
Reporter: Tilman Hausherr
Assignee: Tilman Hausherr
Fix For: 1.8.8, 2.0.0
I get this with the file PDFBOX-2376-087731.pdf:
{code}
java.lang.NullPointerException
PDFBOX-2376-179204-EMC.pdf
at
org.apache.pdfbox.preflight.xobject.XObjImageValidator.checkColorSpaceAndImageMask(XObjImageValidator.java:132)
at
org.apache.pdfbox.preflight.xobject.XObjImageValidator.validate(XObjImageValidator.java:183)
at
org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
at
org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
at
org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
at
org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
at
org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
at
org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
at
org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
at
org.apache.pdfbox.preflight.process.reflect.SinglePageValidationProcess.validateResources(SinglePageValidationProcess.java:167)
at
org.apache.pdfbox.preflight.process.reflect.SinglePageValidationProcess.validate(SinglePageValidationProcess.java:82)
at
org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
at
org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
at
org.apache.pdfbox.preflight.process.PageTreeValidationProcess.validatePage(PageTreeValidationProcess.java:56)
at
org.apache.pdfbox.preflight.process.PageTreeValidationProcess.validate(PageTreeValidationProcess.java:45)
at
org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
at
org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:88)
at
org.apache.pdfbox.preflight.PreflightDocument.validate(PreflightDocument.java:168)
at pdfboxpageimageextraction.PreflightTest.main(PreflightTest.java:47)
{code}
The cause is this piece of code:
{code}
Integer bitsPerCompValue = COSUtils.getAsInteger(bitsPerComp,
cosDocument);
if (bitsPerCompValue != 1)
{code}
which fails on this input:
{code}
44 0 obj<</Length 289/Filter/CCITTFaxDecode/DecodeParms<</K -1/Columns 282/Rows
40>>/Width 282/Height 40/ImageMask true/Subtype/Image>>
{code}
That segment is called only for image masks. The spec does not require
BitsPerComponent for image masks, but if they are there, they must be 1. So all
I have to do is to add a null check.
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