Re: [RFC PATCH 09/11] kallsyms: hide layout and expose seed

Kees Cook
2020-03-02T19:08:08Z

On Mon, Mar 02, 2020 at 11:01:56AM -0800, Kristen Carlson Accardi wrote:
> On Thu, 2020-02-06 at 20:27 +0100, Jann Horn wrote:
> > https://codesearch.debian.net/search?q=%2Fproc%2Fkallsyms&literal=1
>
> I looked through some of these packages as Jann suggested, and it seems
> like there are several that are using /proc/kallsyms to look for
> specific symbol names to determine whether some feature has been
> compiled into the kernel. This practice seems dubious to me, knowing
> that many kernel symbol names can be changed at any time, but
> regardless seems to be fairly common.

Cool, so a sorted censored list is fine for non-root. Would root users
break on a symbol-name-sorted view? (i.e. are two lists needed or can we
stick to one?)

--
Kees Cook