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Posted to dev@pdfbox.apache.org by "Tim Allison (Jira)" <ji...@apache.org> on 2021/04/08 16:55:00 UTC

[jira] [Created] (PDFBOX-5158) Infinite loop on corrupted PDF in 3.0.0-SNAPSHOT

Tim Allison created PDFBOX-5158:
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             Summary: Infinite loop on corrupted PDF in 3.0.0-SNAPSHOT
                 Key: PDFBOX-5158
                 URL: https://issues.apache.org/jira/browse/PDFBOX-5158
             Project: PDFBox
          Issue Type: Task
            Reporter: Tim Allison


I found a bunch of files that had a "read too many EOFs", which is a safety check we now do in TikaInputStream to identify parsers that read an EOF > 1000 times, which may be a sign of an infinite loop.

When I turn off this safety check in TikaInputStream, I get an infinite loop.

This is one of the triggering files: https://corpora.tika.apache.org/base/docs/commoncrawl3/OE/OELHPKYAQPDNDWC535NE23Z6FKYRMN7W

It's a truncated file from Common Crawl.

The stacktrace when this is thrown is:
{noformat}
afterRead:809, TikaInputStream (org.apache.tika.io)
read:82, ProxyInputStream (org.apache.commons.io.input)
<init>:113, RandomAccessReadBuffer (org.apache.pdfbox.io)
loadPDF:454, Loader (org.apache.pdfbox)
loadPDF:430, Loader (org.apache.pdfbox)
getPDDocument:189, PDFParser (org.apache.tika.parser.pdf)
parse:148, PDFParser (org.apache.tika.parser.pdf)
parse:288, CompositeParser (org.apache.tika.parser)
parse:288, CompositeParser (org.apache.tika.parser)
parse:150, AutoDetectParser (org.apache.tika.parser)
parse:157, RecursiveParserWrapper (org.apache.tika.parser)
getRecursiveMetadata:379, TikaTest (org.apache.tika)
getRecursiveMetadata:369, TikaTest (org.apache.tika)
getRecursiveMetadata:357, TikaTest (org.apache.tika)
getRecursiveMetadata:351, TikaTest (org.apache.tika)


{noformat}

The stack 



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