linux-kernel - RE: [PATCH] clk: visconti: Fix memory leak in visconti_register

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Message-ID: <TYWPR01MB9420832555EFC60126BE0909920F9@TYWPR01MB9420.jpnprd01.prod.outlook.com>
Date:   Thu, 24 Nov 2022 01:22:28 +0000
From:   <nobuhiro1.iwamatsu@...hiba.co.jp>
To:     <xiujianfeng@...wei.com>, <mturquette@...libre.com>,
        <sboyd@...nel.org>
CC:     <linux-clk@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] clk: visconti: Fix memory leak in visconti_register_pll()

Hi Xiu,

Thanks for your patch!

> -----Original Message-----
> From: Xiu Jianfeng <xiujianfeng@...wei.com>
> Sent: Wednesday, November 23, 2022 12:24 AM
> To: mturquette@...libre.com; sboyd@...nel.org; iwamatsu nobuhiro(岩松 信
> 洋 □ＳＷＣ◯ＡＣＴ) <nobuhiro1.iwamatsu@...hiba.co.jp>
> Cc: linux-clk@...r.kernel.org; linux-arm-kernel@...ts.infradead.org;
> linux-kernel@...r.kernel.org
> Subject: [PATCH] clk: visconti: Fix memory leak in visconti_register_pll()
> 
> @pll->rate_table has allocated memory by kmemdup(), if clk_hw_register()
> fails, it should be freed, otherwise it will cause memory leak issue, this patch
> fixes it.
> 
> Fixes: b4cbe606dc36 ("clk: visconti: Add support common clock driver and
> reset driver")
> Signed-off-by: Xiu Jianfeng <xiujianfeng@...wei.com>

Acked-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@...hiba.co.jp>

Best regards,
  Nobuhiro
> ---
>  drivers/clk/visconti/pll.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/clk/visconti/pll.c b/drivers/clk/visconti/pll.c index
> a484cb945d67..1f3234f22667 100644
> --- a/drivers/clk/visconti/pll.c
> +++ b/drivers/clk/visconti/pll.c
> @@ -277,6 +277,7 @@ static struct clk_hw *visconti_register_pll(struct
> visconti_pll_provider *ctx,
>  	ret = clk_hw_register(NULL, &pll->hw);
>  	if (ret) {
>  		pr_err("failed to register pll clock %s : %d\n", name, ret);
> +		kfree(pll->rate_table);
>  		kfree(pll);
>  		pll_hw_clk = ERR_PTR(ret);
>  	}
> --
> 2.17.1