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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Work logged] (IMAGING-130) Reading of some GIF images throws java.io.IOException: AddStringToTable: codes: 4096 code_size: 12
Date Thu, 06 Jun 2019 08:44:00 GMT

     [ https://issues.apache.org/jira/browse/IMAGING-130?focusedWorklogId=254993&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-254993
]

ASF GitHub Bot logged work on IMAGING-130:
------------------------------------------

                Author: ASF GitHub Bot
            Created on: 06/Jun/19 08:43
            Start Date: 06/Jun/19 08:43
    Worklog Time Spent: 10m 
      Work Description: coveralls commented on issue #46: IMAGING-130: Ignore extra bytes
when LZW decoder table is full
URL: https://github.com/apache/commons-imaging/pull/46#issuecomment-499405244
 
 
   
   [![Coverage Status](https://coveralls.io/builds/23829168/badge)](https://coveralls.io/builds/23829168)
   
   Coverage increased (+0.1%) to 74.319% when pulling **d328b7f1c3c7e597f4d0c5fa9adb01f8a5a1193a
on mgs255:gif89a_decoding_exception** into **06dd48ee5f3a6bf1bc020891f96bbc2ab154fd26 on apache:master**.
   
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 254993)
    Time Spent: 40m  (was: 0.5h)

> Reading of some GIF images throws java.io.IOException: AddStringToTable: codes: 4096
code_size: 12
> --------------------------------------------------------------------------------------------------
>
>                 Key: IMAGING-130
>                 URL: https://issues.apache.org/jira/browse/IMAGING-130
>             Project: Commons Imaging
>          Issue Type: Bug
>          Components: Format: GIF
>    Affects Versions: 1.0-alpha1
>         Environment: Oracle JRE 1.7.0_45 on Windows 7
> Oracle JRE 1.7.0_55-b13 on Debian 7.5
>            Reporter: Dhyan Blum
>            Priority: Major
>             Fix For: Patch Needed
>
>          Time Spent: 40m
>  Remaining Estimate: 0h
>
> Hi guys,
> for some GIF images Imaging.getBufferedImage(byte[] bytes) throws the following exception:
> {quote}
> java.io.IOException: AddStringToTable: codes: 4096 code_size: 12
> 	at org.apache.commons.imaging.common.mylzw.MyLzwDecompressor.addStringToTable(MyLzwDecompressor.java:112)
> 	at org.apache.commons.imaging.common.mylzw.MyLzwDecompressor.decompress(MyLzwDecompressor.java:168)
> 	at org.apache.commons.imaging.formats.gif.GifImageParser.readImageDescriptor(GifImageParser.java:388)
> 	at org.apache.commons.imaging.formats.gif.GifImageParser.readBlocks(GifImageParser.java:251)
> 	at org.apache.commons.imaging.formats.gif.GifImageParser.readFile(GifImageParser.java:455)
> 	at org.apache.commons.imaging.formats.gif.GifImageParser.readFile(GifImageParser.java:435)
> 	at org.apache.commons.imaging.formats.gif.GifImageParser.getBufferedImage(GifImageParser.java:646)
> 	at org.apache.commons.imaging.Imaging.getBufferedImage(Imaging.java:1378)
> 	at org.apache.commons.imaging.Imaging.getBufferedImage(Imaging.java:1292)
> {quote}
> I have the same problem when using ImageIO.read(). In my post on Stackoverflow ( http://stackoverflow.com/questions/22259714/arrayindexoutofboundsexception-4096-while-reading-gif-file
) you will find an example image to reproduce the exception and a similar looking JDK bug
report that I found using Google. Quote from the bug report:
> {quote}
> A DESCRIPTION OF THE PROBLEM :
> according to specification
> http://www.w3.org/Graphics/GIF/spec-gif89a.txt
> > There is not a requirement to send a clear code when the string table is full.
> However, GIFImageReader requires the clear code when the string table is full.
> GIFImageReader violates the specification, clearly.
> In the real world, sometimes people finds such high compressed gif image.
> so you should fix this bug.
> {quote}
> I hope you will find this information helpful.
> Kind regards
> Dhyan



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