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From "Damjan Jovanovic (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SANSELAN-17) integer overflow unhandled
Date Sun, 05 Feb 2012 19:49:54 GMT

     [ https://issues.apache.org/jira/browse/SANSELAN-17?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Damjan Jovanovic updated SANSELAN-17:
-------------------------------------

    Component/s: Format: JPEG
    
> integer overflow unhandled
> --------------------------
>
>                 Key: SANSELAN-17
>                 URL: https://issues.apache.org/jira/browse/SANSELAN-17
>             Project: Commons Sanselan
>          Issue Type: Bug
>          Components: Format: JPEG
>    Affects Versions: 0.94-incubator
>         Environment: win32, 32 bit operating systems
>            Reporter: Greg Squires
>         Attachments: crash.jpeg
>
>   Original Estimate: 24h
>  Remaining Estimate: 24h
>
> This function can throw an Exception in ByteSourceArray.java due to a negative byte[]
allocation size. The length argument has been found to wrap when called from IccProfileParser.java.
> In 64bit machines, issues related to incorrect metadata, or ICC data can lead to incorrect
and excess memory allocations. These large numbers however cause 32bit negative signed values.
> 	public byte[] getBlock(int start, int length) throws IOException
> 	{
> 		if (start + length > bytes.length)
> 			throw new IOException("Could not read block (block start: " + start
> 					+ ", block length: " + length + ", data length: "
> 					+ bytes.length + ").");
> 		byte result[] = new byte[length];
> 		System.arraycopy(bytes, start, result, 0, length);
> 		return result;
> 	}

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