linux-kernel - Re: [PATCH v2] clk: rs9: Reserve 8 struct clk

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <CAMuHMdUwD9+hYbut37gnJML-Fhz+6kDqUWOcgKSo1eycZRgsvw@mail.gmail.com>
Date: Mon, 19 Jan 2026 16:59:54 +0100
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Marek Vasut <marek.vasut+renesas@...lbox.org>
Cc: linux-clk@...r.kernel.org, stable@...r.kernel.org, 
	Michael Turquette <mturquette@...libre.com>, Stephen Boyd <sboyd@...nel.org>, linux-kernel@...r.kernel.org, 
	linux-renesas-soc@...r.kernel.org
Subject: Re: [PATCH v2] clk: rs9: Reserve 8 struct clk_hw slots for for 9FGV0841

On Mon, 19 Jan 2026 at 16:02, Marek Vasut
<marek.vasut+renesas@...lbox.org> wrote:
> The 9FGV0841 has 8 outputs and registers 8 struct clk_hw, make sure
> there are 8 slots for those newly registered clk_hw pointers, else
> there is going to be out of bounds write when pointers 4..7 are set
> into struct rs9_driver_data .clk_dif[4..7] field.
>
> Since there are other structure members past this struct clk_hw
> pointer array, writing to .clk_dif[4..7] fields corrupts both
> the struct rs9_driver_data content and data around it, sometimes
> without crashing the kernel. However, the kernel does surely
> crash when the driver is unbound or during suspend.
>
> Fix this, increase the struct clk_hw pointer array size to the
> maximum output count of 9FGV0841, which is the biggest chip that
> is supported by this driver.
>
> Cc: stable@...r.kernel.org
> Fixes: f0e5e1800204 ("clk: rs9: Add support for 9FGV0841")
> Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
> Tested-by: Geert Uytterhoeven <geert+renesas@...der.be>
> Reported-by: Geert Uytterhoeven <geert+renesas@...der.be>

Closes: https://lore.kernel.org/CAMuHMdVyQpOBT+Ho+mXY07fndFN9bKJdaaWGn91WOFnnYErLyg@mail.gmail.com

> Signed-off-by: Marek Vasut <marek.vasut+renesas@...lbox.org>
> ---
> Cc: Geert Uytterhoeven <geert+renesas@...der.be>
> Cc: Michael Turquette <mturquette@...libre.com>
> Cc: Stephen Boyd <sboyd@...nel.org>
> Cc: linux-clk@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Cc: linux-renesas-soc@...r.kernel.org
> ---
> V2: - Update the commit message crash paragraph
>     - Add RB/TB from Geert

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds