[TYPO3-core] RFC #3129: Bug: tslib_fe::checkPageGroupAccess() does not check rootLine for extendToSubpages

[S. Teuber]

Bump... can we get a second opinion on this?

>> Bugtracker references:
>> http://bugs.typo3.org/view.php?id=3129
>>
>> Branches:
>> trunk
>>
>> Solution:
>> The issue can be solved by walking up the rootLine if the given page has
>> no fe_group, looking for a parent page that has fe_group and
>> "extendToSubpages"
>> option set. If such a restricted parent page is found, the group check  
>> is
>
> +1 on reading and testing
>
> As $this->sys_page->getRootLine is using a cache internally, performance  
> should stay quite ok I think, although it'll create some additional  
> overhead for every linked page on a site.
>
> I wonder if we also have to adjust the method  
> 'getPageAccessFailureReasons' accordingly, as it's using  
> "checkPageGroupAccess" internally but won't return the correct  
> 'fe_group' as it would return fe_group of the currently tested page and  
> not the one probably found in the rootline.