Re: [PATCH v4 00/10] Function Granular KASLR

[Joe Lawrence]

On 7/22/20 10:51 AM, Joe Lawrence wrote:
> On 7/22/20 10:39 AM, Kees Cook wrote:
> > On Wed, Jul 22, 2020 at 11:27:30AM +0200, Miroslav Benes wrote:
> > > Let me CC live-patching ML, because from a quick glance this is something
> > > which could impact live patching code. At least it invalidates assumptions
> > > which "sympos" is based on.
> >
> > In a quick skim, it looks like the symbol resolution is using
> > kallsyms_on_each_symbol(), so I think this is safe? What's a good
> > selftest for live-patching?
>
> Hi Kees,
>
> I don't think any of the in-tree tests currently exercise the
> kallsyms/sympos end of livepatching.

On second thought, I mispoke.. The general livepatch code does use it:

klp_init_object
  klp_init_object_loaded
    klp_find_object_symbol

in which case any of the current kselftests should exercise that.

  % make -C tools/testing/selftests/livepatch run_tests

-- Joe