Re: [PATCH v5 next 0/5] Improve Module autoloading infrastructure
From: James Morris
Date: Mon Nov 27 2017 - 18:46:16 EST
On Mon, 27 Nov 2017, Kees Cook wrote:
> > if (WARN_ON_ONCE(!capable(CAP_SYS_MODULE) ||
> > !capable(CAP_SYS_ADMIN) ||
> > !capable(CAP_NET_ADMIN) ||
> > !unprivileged_autoload(module_name)))
(Side note: the capable() calls would ideally come after the whitelist
check).
> We have some of this already with the module prefixes. Doing this
> per-module would need to be exported to userspace, I think. It'd be
> way too fragile sitting in the kernel.
What about writing a whitelist to /proc (per-task) or /sys/fs (global) ?
The per-task whitelist is inherited from the global one by default, or
from a parent process if it's been modified in the parent.
--
James Morris
<james.l.morris@xxxxxxxxxx>