linux-kernel - Re: [PATCH v4 00/10] Rework REFCOUNT_FULL using atomic_fetch

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Date:   Wed, 30 Oct 2019 11:40:56 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Will Deacon <will@...nel.org>
Cc:     linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
        Elena Reshetova <elena.reshetova@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Hanjun Guo <guohanjun@...wei.com>,
        Jan Glauber <jglauber@...vell.com>
Subject: Re: [PATCH v4 00/10] Rework REFCOUNT_FULL using atomic_fetch_*
 operations

On Wed, Oct 30, 2019 at 02:30:25PM +0000, Will Deacon wrote:
> Hi all,
> 
> This is version four of the patches I previously posted here:
> 
>   v1: https://lkml.kernel.org/r/20190802101000.12958-1-will@kernel.org
>   v2: https://lkml.kernel.org/r/20190827163204.29903-1-will@kernel.org
>   v3: https://lkml.kernel.org/r/20191007154703.5574-1-will@kernel.org
> 
> Changes since v3 include:
> 
>   - Add description of racy behaviour include/linux/refcount.h
>   - Fix saturation behaviour in refcount_sub_and_test()
>   - Added Acks and Tested-bys

Thanks again for this! I think this series is in good shape; I'm glad we
can sanely expand these protections.

-- 
Kees Cook