Re: [PATCH v2 1/2] Documentation/admin-guide: introduce perf-security.rst file

Jonathan Corbet
2018-11-25T19:47:45Z

On Wed, 21 Nov 2018 12:14:14 +0300
Alexey Budankov <alexey.budankov@linux.intel.com> wrote:

> +For the purpose of performing security checks Linux implementation splits
> +processes into two categories [6]_ : a) privileged processes (whose effective
> +user ID is 0, referred to as superuser or root), and b) unprivileged processes
> +(whose effective UID is nonzero).

Is that really what's going on here? If I understand things correctly,
it's looking for CAP_SYS_PTRACE rather than a specific UID; am I missing
something here?

(Also, you would want "*the* Linux implementation" in the first sentence
above).

One other thing:

> +(whose effective UID is nonzero). Privileged processes bypass all kernel
> +security permission checks so perf_events performance monitoring is fully
> +available to privileged processes without *access*, *scope* and *resource*
> +restrictions.

Could I ask for a slight toning down of the markup here? There's a lot of
*emphasis* here that isn't really needed and tends to get in the way.

Thanks,

jon