[dm-devel] [PATCH 1/1] dm: add message command to disallow device open

[Daniil Lunev]

> This seems like an access control policy, which the Linux kernel already has a
> lot of mechanisms for.  Chrome OS already uses SELinux.  Couldn't this be solved
> by giving the device node an SELinux label that no one has permission to open?
That would be the ideal solution, but there is a number of challenges
that prevent
us enabling enforcement on all SELinux domains unfortunately. While in the long
run that would be a preferred option, in the short run this doesn't
seem feasible. I
would assume the problem of enabling full SELInux enforcement would plague
any big project that didn't have them enabled from the get going.
--Daniil