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Message-ID: <alpine.DEB.2.21.1803281210040.3247@nanos.tec.linutronix.de>
Date: Wed, 28 Mar 2018 12:10:52 +0200 (CEST)
From: Thomas Gleixner <tglx@...utronix.de>
To: Kees Cook <keescook@...omium.org>
cc: Andrew Morton <akpm@...ux-foundation.org>,
LKML <linux-kernel@...r.kernel.org>,
Segher Boessenkool <segher@...nel.crashing.org>,
Kernel Hardening <kernel-hardening@...ts.openwall.com>
Subject: Re: [PATCH v2] rslib: Remove VLAs by setting upper bound on nroots
On Wed, 28 Mar 2018, Thomas Gleixner wrote:
> On Tue, 27 Mar 2018, Kees Cook wrote:
>
> > > I guess if we put this storage into the rs_control (rather than on the
> > > stack) then we'd have to worry about concurrent uses of it. It looks
> > > like all the other fields are immutable once it's set up so there might
> > > be such users. In fact, I suspect there are...
> >
> > Exactly. :( This is the same conclusion tglx and I came to.
>
> I think we can lift that and just let all users set up a new rs_control
> from scratch. Takes some time to init the tables, but ....
Bah, no. dm-verity really wants to share them.....
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