Re: [WARNING] x86/mm: Found insecure W+X mapping at address ..

[Thomas Gleixner]

On Tue, 23 May 2017, Steven Rostedt wrote:

> On Tue, 23 May 2017 22:48:19 +0200 (CEST)
> Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:
> 
> 
> > It's not KPROBES, it's the new fangled ftrace trampoline code. I
> > added a few printks. All the leaked W+X mappings are allocated via
> > this callchain:
> 
> The trampoline code isn't new. But it has new users because of the
> introduction to synchronize_rcu_tasks(), and there was a bug I fixed in
> -rc2 that moved it down because the test was run before
> synchronize_rcu_tasks() was functional.
> 
> Is this still a bug in rc2?

Yes. Otherwise we wouldn't talking about.

Thanks,

	tglx