linux-kernel - Re: [PATCH 2/2] ASoC: mediatek: mt8195: fix use-after-free in driver remove path

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Date:   Thu, 1 Jun 2023 02:20:26 +0000
From:   Trevor Wu (吳文良) <Trevor.Wu@...iatek.com>
To:     "dianders@...omium.org" <dianders@...omium.org>
CC:     "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "broonie@...nel.org" <broonie@...nel.org>,
        "tiwai@...e.com" <tiwai@...e.com>,
        "lgirdwood@...il.com" <lgirdwood@...il.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        "perex@...ex.cz" <perex@...ex.cz>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>
Subject: Re: [PATCH 2/2] ASoC: mediatek: mt8195: fix use-after-free in driver
 remove path

On Wed, 2023-05-31 at 16:47 -0700, Doug Anderson wrote:
>  	 
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
>  Hi,
> 
> On Tue, May 30, 2023 at 12:25 AM Trevor Wu <trevor.wu@...iatek.com>
> wrote:
> >
> > diff --git a/sound/soc/mediatek/mt8195/mt8195-audsys-clk.c
> b/sound/soc/mediatek/mt8195/mt8195-audsys-clk.c
> > index e0670e0dbd5b..09bd1a020421 100644
> > --- a/sound/soc/mediatek/mt8195/mt8195-audsys-clk.c
> > +++ b/sound/soc/mediatek/mt8195/mt8195-audsys-clk.c
> > @@ -148,6 +148,29 @@ static const struct afe_gate
> aud_clks[CLK_AUD_NR_CLK] = {
> >         GATE_AUD6(CLK_AUD_GASRC19, "aud_gasrc19", "top_asm_h", 19),
> >  };
> >
> > +static void mt8195_audsys_clk_unregister(void *data)
> > +{
> > +       struct mtk_base_afe *afe = (struct mtk_base_afe *)data;
> 
> Same as in patch #1, the above cast isn't necessary. Other than that:
> 
> Reviewed-by: Douglas Anderson <dianders@...omium.org>

OK, I will remove the cast in V2.

Thanks,
Trevor