linux-kernel - Re: [refpolicy] ath9k capability=16 won't compile into policy

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Message-ID: <494A8BC7.7000407@gmail.com>
Date:	Thu, 18 Dec 2008 09:43:35 -0800
From:	"Justin P. Mattock" <justinmattock@...il.com>
To:	Daniel J Walsh <dwalsh@...hat.com>
CC:	SE-Linux <selinux@...ho.nsa.gov>,
	tresys <refpolicy@....tresys.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [refpolicy] ath9k capability=16 won't compile into policy

Daniel J Walsh wrote:
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> Justin Mattock wrote:
>   
>> I'm not too sure if I should post this with SELinux,
>> refpolicy, or kernel.org,(or even wpasupplicant);
>>  so I decided to do all to the best of my knowledge.
>> when using the ath9k module with the latest git
>> kernel(or atleast a few days old); and the latest refpolicy (svn)
>> I'm seeing this avc denial show up:
>>
>> Dec 16 12:33:32 name kernel: [   20.415785] type=1400
>> audit(1229459612.411:3): avc:  denied  { sys_module } for  pid=2510
>> comm="wpa_supplicant" capability=16
>> scontext=system_u:system_r:system_dbusd_t:s0
>> tcontext=system_u:system_r:system_dbusd_t:s0 tclass=capability
>> Dec 16 12:33:32 name kernel: [   20.428494] type=1300
>> audit(1229459612.411:3): arch=40000003 syscall=54 success=no exit=-19
>> a0=9 a1=8933 a2=bfadd94c a3=bfadd94c items=0 ppid=1 pid=2510
>> auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0
>> fsgid=0 tty=(none) ses=4294967295 comm="wpa_supplicant"
>> exe="/sbin/wpa_supplicant" subj=system_u:system_r:system_dbusd_t:s0
>> key=(null)
>>
>> the allow rule is:(with ath9k module)
>> allow system_dbusd_t self:capability sys_module;
>> which in turn will be rejected by checkpolicy
>> (capability 16)
>> when compiling the policy.
>>
>> If I use the madwifi module the avc is similar but produces
>> allow system_dbusd_t self:capability { sys_admin }
>> (capability 12)
>> and will be accepted by checkpolicy.
>>
>> As for setup I'm using NetworkManager from
>> intrepid as well as wpasupplicant
>>
>> Any info would be appreciated so I can test this module out
>> and feel better knowing the module is not being denied in any
>> way, that might cause a false positive, or some other weirdness.
>>
>>
>> regards;
>>     
> We label wpa_supplicant as NetworkManager_exec_t and have dbus
> transition to this domain.
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>   
Cool thanks for the info.
I just have to figure out how
to get the machine to do that.
i.g. through dispatcher.d or network/interfaces.
one thing that I'm noticing is ubuntu's version of
NetworkManager only has two plugins(01ifupdown,keyfile);
I'll try loading another version and see if the other plugins
is what I'm missing to have dbusd transition
correctly.

regards;

Justin P. Mattock




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