linux-kernel - Re: [kernel-hardening] [PATCH] arm: Always use REFCOUNT

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Message-ID: <20180104183504.GQ28752@n2100.armlinux.org.uk>
Date:   Thu, 4 Jan 2018 18:35:04 +0000
From:   Russell King - ARM Linux <linux@...linux.org.uk>
To:     Kees Cook <keescook@...omium.org>
Cc:     Jinbum Park <jinb.park7@...il.com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        kernel-hardening@...ts.openwall.com,
        Will Deacon <will.deacon@....com>,
        LKML <linux-kernel@...r.kernel.org>,
        Dave Martin <Dave.Martin@....com>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [kernel-hardening] [PATCH] arm: Always use REFCOUNT_FULL

On Thu, Jan 04, 2018 at 10:32:46AM -0800, Kees Cook wrote:
> On Thu, Jan 4, 2018 at 4:28 AM, Jinbum Park <jinb.park7@...il.com> wrote:
> > arm prefers to use REFCOUNT_FULL by default.
> > This enables it for arm.
> >
> > Signed-off-by: Jinbum Park <jinb.park7@...il.com>
> 
> Acked-by: Kees Cook <keescook@...omium.org>

I'd help if there was some kind of explanation about this.  Not
everyone knows what REFCOUNT_FULL is.

Also, why does "arm" "prefer" to use this?  Where does the preference
come from - and why is it a preference but being enforced by the
Kconfig ?

-- 
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
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