Re: genhomedircon is broken in libsemanage

[Joshua Brindle <method@manicmethod.com>]

Daniel J Walsh wrote:
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> Joshua Brindle wrote:
>   
>> Todd Miller wrote:
>>     
>>> Daniel J Walsh wrote:
>>>  
>>>       
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>>>> Adding
>>>>
>>>> mythtv:x:1004:1004::/var/lib/mythtv:/bin/bash
>>>>
>>>> To /etc/passwd causes the labeling to get all screwed up.  This would
>>>> report an error when we used the python version of genhomedircon and
>>>> not foul up the labeling by checking if there was a label for /var/lib
>>>> already in the file_context file. (Boy do I love python.  :^))
>>>>
>>>> https://bugzilla.redhat.com/show_bug.cgi?id=430195
>>>>
>>>> Dan
>>>>     
>>>>         
>>> That shouldn't be hard to add to genhomedircon.c.  I'll take a look.
>>>   
>>>       
>> So, Todd is about to send a patch to fix this but I want to point out
>> that I'm adverse to this sort of thing. There is a minuid and a null
>> shell for a reason, using something above minuid with a valid shell for
>> a non-interactive user is a broken configuration and the fact that we
>> have to work around it is pretty unfortunate.
>>
>> That said the alternative of breaking the system labeling is pretty bad,
>> its probably better to hack around the problem than leave clueless users
>> with broken configurations stranded but I really wish we didn't have to
>> do things like this.
>>
>> *sigh*
>>
>>     
> I think you need to scream in the semanage that this is bad behavior,
> and you can't fix the labels.  The /var/lib situation is bad, but I more
> commonly see admins putting real users in /usr/local or under /var.  We
> need to have a message that explains this is bad and SELinux can not
> handle it.
>   

Well, this is part of the configurability of Linux and thats why people 
love it, right? One solution would be to effectively get rid of 
directory search denials on commodity policies (eg., give all domains 
search on all dirs for the RH policy) then we don't have to worry about 
the "top level home" directory label at all.


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