On 11/04/2015 11:35 AM, Stephen Smalley wrote:
>On 11/03/2015 11:00 AM, Mahaveer, Vishal wrote:
>> Hi,
>>
>> Wanted to know what is the status of rpmsg_device in latest seandroid
>policies.
>> Is it up to date with latest seandroid developments?
>>
>> Currently only mediaserver has access to it.
>> Reason for this query is because there are no Nexus devices that use
>rpmsg device.
>>
>> We have platforms that still use rpmsg device and Currently we see
>> selinux denials for rpmsg_device from system_server, platform_apps and
>untrusted_apps.
>
>You need to investigate why you have other processes trying to directly
>access rpmsg, as this is potentially a security risk (e.g. do you really
>want arbitrary third party apps to be able to directly access the driver
>and potentially send arbitrary data to the remote processor?).

In our case rpmsg_device is accessed by libstagefrighthw.
We use rpmsg_device as hardware decoder 

Should I define it as video_device instead?
That would take care of system_server denials.

I am yet to figure out why systemui (platform_app) is using hardware decoder. 

>
>I think when rpmsg_device was introduced, it was only being used for camera
>and thus only mediaserver required it.  I'm not overly concerned with
>opening it up to system_server, but apps are another thing...



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