Subject: Re: [PATCH 3/3 V13] RO/NX protection for loadable kernel

From: Rusty Russell <[email-masked]>
Date: Tue, 30 Nov 2010 10:05:29 +1030

On Tue, 30 Nov 2010 04:45:42 am Steven Rostedt wrote:
> This patch breaks function tracer:
...
> Here we set the text read only before we call the notifiers. The
> function tracer changes the calls to mcount into nops via a notifier
> call so this must be done after the module notifiers.

That seems fine.

I note that both before and after this patch we potentially execute code
in the module (via parse_args) before we set it ro & nx.  But fixing this
last bit of coverage is probably not worth the pain...

Cheers,
Rusty.