linux-kernel - Re: [PATCH v1 1/2] stackprotector: move CANARY_MASK and get_random

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Date:   Mon, 24 Oct 2022 07:25:08 +0200
From:   Philippe Mathieu-Daudé <philmd@...aro.org>
To:     "Jason A. Donenfeld" <Jason@...c4.com>,
        linux-kernel@...r.kernel.org
Cc:     Albert Ou <aou@...s.berkeley.edu>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Borislav Petkov <bp@...en8.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Chris Zankel <chris@...kel.net>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Guo Ren <guoren@...nel.org>, "H . Peter Anvin" <hpa@...or.com>,
        Ingo Molnar <mingo@...hat.com>,
        Juergen Gross <jgross@...e.com>,
        Max Filippov <jcmvbkbc@...il.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Rich Felker <dalias@...c.org>,
        Russell King <linux@...linux.org.uk>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Will Deacon <will@...nel.org>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        linux-arm-kernel@...ts.infradead.org, linux-csky@...r.kernel.org,
        linux-mips@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-sh@...r.kernel.org, linux-xtensa@...ux-xtensa.org,
        linuxppc-dev@...ts.ozlabs.org, x86@...nel.org
Subject: Re: [PATCH v1 1/2] stackprotector: move CANARY_MASK and
 get_random_canary() into stackprotector.h

On 23/10/22 22:32, Jason A. Donenfeld wrote:
> This has nothing to do with random.c and everything to do with stack
> protectors. Yes, it uses randomness. But many things use randomness.
> random.h and random.c are concerned with the generation of randomness,
> not with each and every use. So move this function into the more
> specific stackprotector.h file where it belongs.
> 
> Signed-off-by: Jason A. Donenfeld <Jason@...c4.com>
> ---
>   arch/x86/kernel/cpu/common.c   |  2 +-
>   arch/x86/kernel/setup_percpu.c |  2 +-
>   arch/x86/kernel/smpboot.c      |  2 +-
>   arch/x86/xen/enlighten_pv.c    |  2 +-
>   include/linux/random.h         | 19 -------------------
>   include/linux/stackprotector.h | 19 +++++++++++++++++++
>   kernel/fork.c                  |  2 +-
>   7 files changed, 24 insertions(+), 24 deletions(-)

Reviewed-by: Philippe Mathieu-Daudé <philmd@...aro.org>