linux-kernel - Re: [PATCH 1/3] clk: mediatek: clk-mtk: Grab iomem pointer for divider clocks

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

Message-ID: <c38a32fce0d3642b6be85efd46d8c358.sboyd@kernel.org>
Date:   Fri, 16 Jun 2023 12:21:01 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     mturquette@...libre.com, matthias.bgg@...il.com,
        angelogioacchino.delregno@...labora.com, wenst@...omium.org,
        u.kleine-koenig@...gutronix.de, msp@...libre.com,
        miles.chen@...iatek.com, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, kernel@...labora.com
Subject: Re: [PATCH 1/3] clk: mediatek: clk-mtk: Grab iomem pointer for divider clocks

Quoting AngeloGioacchino Del Regno (2023-06-15 05:20:49)
> In the rare case in which one of the clock drivers has divider clocks
> but not composite clocks, mtk_clk_simple_probe() would not io(re)map,
> hence passing a NULL pointer to mtk_clk_register_dividers().
> 
> To fix this issue, extend the `if` conditional to also check if any
> divider clocks are present. While at it, also make sure the iomem
> pointer is NULL if no composite/divider clocks are declared, as we
> are checking for that when iounmapping it in the error path.
> 
> This hasn't been seen on any MediaTek clock driver as the current ones
> always declare composite clocks along with divider clocks, but this is
> still an important fix for a future potential KP.
> 
> Fixes: 1fe074b1f112 ("clk: mediatek: Add divider clocks to mtk_clk_simple_{probe,remove}()")
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---

Applied to clk-next