linux-kernel - Re: [PATCH v2] ep93xx: clock: Do not return the address of the freed memory

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Message-ID: <c80f2441c19766ef13a44c5cd62ec5af6a1e4af3.camel@gmail.com>
Date:   Tue, 17 May 2022 09:44:26 +0200
From:   Alexander Sverdlin <alexander.sverdlin@...il.com>
To:     Genjian Zhang <zhanggenjian123@...il.com>,
        hsweeten@...ionengravers.com, linux@...linux.org.uk
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Genjian Zhang <zhanggenjian@...inos.cn>
Subject: Re: [PATCH v2] ep93xx: clock: Do not return the address of the
 freed memory

Thank you Genjian!

On Tue, 2022-05-17 at 15:39 +0800, Genjian Zhang wrote:
> Avoid return freed memory addresses,Modified to the actual error
> return value of clk_register().
> 
> Fixes: 9645ccc7bd7a ("ep93xx: clock: convert in-place to COMMON_CLK")
> Signed-off-by: Genjian Zhang <zhanggenjian@...inos.cn>

Acked-by: Alexander Sverdlin <alexander.sverdlin@...il.com>

> ---
>  arch/arm/mach-ep93xx/clock.c | 10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/arm/mach-ep93xx/clock.c b/arch/arm/mach-ep93xx/clock.c
> index 4fa6ea5461b7..85a496ddc619 100644
> --- a/arch/arm/mach-ep93xx/clock.c
> +++ b/arch/arm/mach-ep93xx/clock.c
> @@ -345,9 +345,10 @@ static struct clk_hw *clk_hw_register_ddiv(const char *name,
>         psc->hw.init = &init;
>  
>         clk = clk_register(NULL, &psc->hw);
> -       if (IS_ERR(clk))
> +       if (IS_ERR(clk)) {
>                 kfree(psc);
> -
> +               return ERR_CAST(clk);
> +       }
>         return &psc->hw;
>  }
>  
> @@ -452,9 +453,10 @@ static struct clk_hw *clk_hw_register_div(const char *name,
>         psc->hw.init = &init;
>  
>         clk = clk_register(NULL, &psc->hw);
> -       if (IS_ERR(clk))
> +       if (IS_ERR(clk)) {
>                 kfree(psc);
> -
> +               return ERR_CAST(clk);
> +       }
>         return &psc->hw;
>  }
>  

-- 
Alexander Sverdlin.