linux-kernel - Re: [PATCH v1 1/1] pstore/ram: Fix crash when setting number of cpus to an odd number

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Message-Id: <169948333592.634220.3558707769669516163.b4-ty@chromium.org>
Date:   Wed,  8 Nov 2023 14:42:17 -0800
From:   Kees Cook <keescook@...omium.org>
To:     yt.shen@...iatek.com, darren.chen@...iatek.com,
        tony.luck@...el.com, angelogioacchino.delregno@...labora.com,
        matthias.bgg@...il.com, gpiccoli@...lia.com,
        linux-hardening@...r.kernel.org, linux-kernel@...r.kernel.org,
        Weichen Chen <weichen.chen@...iatek.com>
Cc:     Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH v1 1/1] pstore/ram: Fix crash when setting number of cpus to an odd number

On Fri, 24 Feb 2023 10:36:32 +0800, Weichen Chen wrote:
> When the number of cpu cores is adjusted to 7 or other odd numbers,
> the zone size will become an odd number.
> The address of the zone will become:
>     addr of zone0 = BASE
>     addr of zone1 = BASE + zone_size
>     addr of zone2 = BASE + zone_size*2
>     ...
> The address of zone1/3/5/7 will be mapped to non-alignment va.
> Eventually crashes will occur when accessing these va.
> 
> [...]

Applied to for-next/pstore, thanks!

[1/1] pstore/ram: Fix crash when setting number of cpus to an odd number
      https://git.kernel.org/kees/c/1d49dee6b691

Take care,

-- 
Kees Cook