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From "Matthew Woodcraft (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MODPYTHON-234) SystemError: bad argument to internal function
Date Thu, 26 Jun 2008 12:19:45 GMT

    [ https://issues.apache.org/jira/browse/MODPYTHON-234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12608403#action_12608403
] 

Matthew Woodcraft commented on MODPYTHON-234:
---------------------------------------------

In req_read() (as of 3.3.1), the return value of the first call to ap_get_client_block() isn't
checked for errors.

If this call returns -1 and the following call to ap_get_client_block() returns
0, it seems to me that the result would be a call to _PyString_Resize with size -1, which
matches the SystemError above.



> SystemError: bad argument to internal function
> ----------------------------------------------
>
>                 Key: MODPYTHON-234
>                 URL: https://issues.apache.org/jira/browse/MODPYTHON-234
>             Project: mod_python
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 3.2.10, 3.3.1
>            Reporter: Graham Dumpleton
>
> As raised in thread:
>   http://www.modpython.org/pipermail/mod_python/2007-June/023795.html
> when req.read() is called, on rare occasions it can generate the error:
> 05 18:33:49 2007] [error] [client 200.155.85.225] SystemError: Objects/stringobject.c:3515:
bad argument to internal function,
> It is speculated that this is caused by an invalid value being supplied to _PyString_Resize()
with code associated with req.read(). In particular, most likely being supplied a negative
value for size.
> This issues possibly relates to problems with how mod_python makes use of content length
and what request_rec says in respect of remaining amount of data as described in MODPYTHON-212.
> Further highlights how the code for req.read(), req.readline() and req.readlines() has
to be completely revised and overhauled to simply read whatever is available rather than trusting
content length.

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