[issue4722] _winreg.QueryValue fault while reading mangled registry values

[Mark Lawrence]

Change by Mark Lawrence :


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nosy:  -BreamoreBoy

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[issue4722] _winreg.QueryValue fault while reading mangled registry values

[Brian Curtin]

Changes by Brian Curtin :


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nosy:  -brian.curtin

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[issue4722] _winreg.QueryValue fault while reading mangled registry values

[Mark Lawrence]

Mark Lawrence added the comment:

I can't reproduce this with 64 bit Windows 8.1 using 3.4.1 or 3.5.0a0, I don't 
have 2.7 to test on.

--
nosy: +BreamoreBoy, steve.dower, tim.golden, zach.ware
versions: +Python 2.7 -Python 2.6

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[issue4722] _winreg.QueryValue fault while reading mangled registry values

[Atsuo Ishimoto]

Changes by Atsuo Ishimoto :


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nosy: +ishimoto

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[issue4722] _winreg.QueryValue fault while reading mangled registry values

[Brian Curtin]

Changes by Brian Curtin :


Removed file: http://bugs.python.org/file15960/issue4722.diff

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[issue4722] _winreg.QueryValue fault while reading mangled registry values

[Brian Curtin]

Brian Curtin  added the comment:

On Windows 7, I see the issue as both a regular user and one with admin 
privileges. The patch (updated to fix tab/space difference) seems to do the 
trick. 
Gabriel, which OS are you on that this works differently based on the user 
privileges?

I'm still not sure how to test this...not sure how to modify the binary data 
and leave it blank via code.

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Added file: http://bugs.python.org/file15960/issue4722.diff

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[issue4722] _winreg.QueryValue fault while reading mangled registry values

[Brian Curtin]

Changes by Brian Curtin :


Removed file: http://bugs.python.org/file15265/issue4722_20091104_v1.patch

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[issue4722] _winreg.QueryValue fault while reading mangled registry values

[Brian Curtin]

Changes by Brian Curtin :


--
keywords: +needs review
priority:  -> normal
stage:  -> patch review
versions:  -Python 2.5

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[issue4722] _winreg.QueryValue fault while reading mangled registry values

[Gabriel Genellina]

Gabriel Genellina  added the comment:

I've noticed this depends on the user privileges. When logged in as a 
normal user, I get the internal error as originally reported. When 
logged in as an administrator, there is no error and I get an empty 
string.

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[issue4722] _winreg.QueryValue fault while reading mangled registry values

[Brian Curtin]

Brian Curtin  added the comment:

It happens to me on trunk with Windows XP. I also have access to Windows
Server 2003 where I can test this (haven't yet). Which version are you
running that you don't see this issue?

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[issue4722] _winreg.QueryValue fault while reading mangled registry values

[Gabriel Genellina]

Changes by Gabriel Genellina :


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nosy: +gagenellina

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[issue4722] _winreg.QueryValue fault while reading mangled registry values

[Alex]

New submission from Alex :

== What steps will reproduce the problem?
1. Create registry key (let's assume it's located in
HKEY_CURRENT_USER\TestKey);
2. Walk to it in "regedit";
3. Right-click on "(Default)" and select "Modify binary data";
4. Leave everything blank and press "OK";
5. Go to Python and execute this:
>>> import _winreg
>>> _winreg.QueryValue(_winreg.HKEY_CURRENT_USER, 'TestKey')
Traceback (most recent call last):
  File "", line 1, in 
SystemError: ..\Objects\stringobject.c:4271: bad argument to internal
function

== What is the expected output? What do you see instead?
I expect either returning "''" or some ValueError indicating that source
string is malformed.

== What version of the product are you using? On what operating system?
1. Windows XP Professional SP2 English;
2. Tested on Python 2.5.2;
3. Tested on Python 2.6.1;
4. Tested on Stackless Python 2.5.2.

== Please provide any additional information below.
And yes, I know that this function is lame and everybody using it also
is lame, but it's not really a reason to include buggy functions, right?

--
components: Library (Lib), Windows
messages: 78190
nosy: malicious.wizard
severity: normal
status: open
title: _winreg.QueryValue fault while reading mangled registry values
type: behavior
versions: Python 2.5, Python 2.6

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