Hi,

On 06/12/2017 06:56 PM, Salvatore Mesoraca wrote:

Creation of a new LSM hook that can be used to authorize or deauthorize
new USB devices via the usb authorization interface.
The same hook can also prevent the authorization of a USB device via
"/sys/bus/usb/devices/DEVICE/authorized".
Using this hook an LSM could provide an higher level of granularity
than the current authorization interface.

Could you please explain me why we need LSM for this?

There are tools like usbguard[1] and as far as I can tell it looks like 
they can do everything for you...
Without kernel modification...
without matching and storing rules inside kernel..
just pure userspace which uses device/interface authorization

Footnote:
1 - https://dkopecek.github.io/usbguard/

Best regards,
-- 
Krzysztof Opasiak
Samsung R&D Institute Poland
Samsung Electronics
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