On Thu, 27 Jun 2019, Josh Poimboeuf wrote:
> On Fri, Jun 28, 2019 at 01:09:08AM +0200, Thomas Gleixner wrote:
> > On Thu, 27 Jun 2019, Steven Rostedt wrote:
> > > I agree with Josh on this. As the original bug was the race between
> > > ftrace and live patching / modules changing the text from ro to rw and
> > > vice versa. Just protecting the update to the text permissions is more
> > > robust, and should be more self documenting when we need to handle
> > > other architectures for this.
> >
> > How is that supposed to work?
> >
> > ftrace
> > prepare()
> > setrw()
> > setro()
> > patch <- FAIL
>
> /me dodges frozen shark
>
> You are right of course. My brain has apparently already shut off for
> the day.
>
> Maybe a comment or two would help though.
Agreed. That would indeed be useful.
Thanks,
tglx
