linux-kernel - Re: [PATCH] doc: update 'unique identifiers'

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Message-ID: <20171204233936.GK21565@eros>
Date:   Tue, 5 Dec 2017 10:39:36 +1100
From:   "Tobin C. Harding" <me@...in.cc>
To:     Kees Cook <keescook@...omium.org>
Cc:     Jonathan Corbet <corbet@....net>,
        Laura Abbott <labbott@...hat.com>,
        Jessica Yu <jeyu@...hat.com>, linux-doc@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] doc: update 'unique identifiers'

On Mon, Dec 04, 2017 at 01:51:42PM -0800, Kees Cook wrote:
> On Mon, Dec 4, 2017 at 1:44 PM, Tobin C. Harding <me@...in.cc> wrote:
> > On Mon, Dec 04, 2017 at 01:28:45PM -0800, Kees Cook wrote:
> >> On Mon, Dec 4, 2017 at 1:22 PM, Tobin C. Harding <me@...in.cc> wrote:
> >> > Advice about what to use as a unique identifier is no longer valid since
> >> > patch series was merged to hash pointers printed with %p. We can use
> >> > this as a unique identifier now.
> >> >
> >> > Signed-off-by: Tobin C. Harding <me@...in.cc>
> >>
> >> I don't agree: %p should still not be encouraged. Exposing an
> >> identifier to userspace needs careful consideration, and atomics,
> >> idrs, etc, continue to be a good recommendation here, as far as I'm
> >> concerned.
> >
> > Ok no worries, so these docs are valid and current as is? I have no
> > agenda with this patch, just attempting to keep the docs in line with
> > the code :)
> 
> I think a section could be added/updated discussing leaks and %p (in
> that it is hashing now), that would be quite welcome!
> 
> I do, probably need to go through this document and update a few things.

How about I do whatever generates the least amount of work for you. Is
it easier if I add the %p stuff for you to review or is it easier to
just leave it for you to do in your own time?

thanks,
Tobin.