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https://issues.apache.org/jira/browse/HADOOP-4271?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12634557#action_12634557
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Raghu Angadi commented on HADOOP-4271:
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Ning,

I filed HADOOP-4277 for 'verifyChecksum'. Could you assign it to yourself if 
you don't mind fixing it?  I will mark this jira dependent on it.

> Bug in FSInputChecker makes it possible to read from an invalid buffer
> ----------------------------------------------------------------------
>
>                 Key: HADOOP-4271
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4271
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 0.16.0
>            Reporter: Ning Li
>            Assignee: Ning Li
>            Priority: Blocker
>             Fix For: 0.17.3
>
>         Attachments: .data_testFSInputChecker.crc, data_testFSInputChecker, 
> hadoop-4271.patch, hadoop-4271.patch
>
>
> Bug in FSInputChecker makes it possible to read from an invalid buffer. The 
> buffer in FSInputChecker becomes invalid when readChecksumChunk is used to 
> read a chunk to a user buffer directly. Currently, it's not marked as invalid 
> in this case and may be read subsequently.

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