[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Message-ID: <648ff5d2-9a52-3a73-46b8-a903315202d9@huawei.com>
Date: Wed, 23 Nov 2022 17:21:05 +0800
From: xiujianfeng <xiujianfeng@...wei.com>
To: Heiko Stuebner <heiko@...ech.de>, <mturquette@...libre.com>,
<sboyd@...nel.org>, <mturquette@...aro.org>
CC: <linux-clk@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-rockchip@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] clk: rockchip: Fix memory leak in
rockchip_clk_register_pll()
Hi,
在 2022/11/23 17:01, Heiko Stuebner 写道:
> Hi,
>
> Am Mittwoch, 23. November 2022, 04:22:37 CET schrieb Xiu Jianfeng:
>> If clk_register() fails, @pll->rate_table may have allocated memory by
>> kmemdup(), so it needs to be freed, otherwise will cause memory leak
>> issue, this patch fixes it.
>>
>> Fixes: 90c590254051 ("clk: rockchip: add clock type for pll clocks and pll used on rk3066")
>> Signed-off-by: Xiu Jianfeng <xiujianfeng@...wei.com>
>> ---
>> drivers/clk/rockchip/clk-pll.c | 1 +
>> 1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/clk/rockchip/clk-pll.c b/drivers/clk/rockchip/clk-pll.c
>> index 4b9840994295..dc4ce280d125 100644
>> --- a/drivers/clk/rockchip/clk-pll.c
>> +++ b/drivers/clk/rockchip/clk-pll.c
>> @@ -1200,6 +1200,7 @@ struct clk *rockchip_clk_register_pll(struct rockchip_clk_provider *ctx,
>> clk_unregister(mux_clk);
>> mux_clk = pll_clk;
>> err_mux:
>> + kfree(pll->rate_table);
>
> I think this free needs to go up to the err_pll block.
>
> In the code it is
> - clk_register(pll_mux->hw) -> err_mux
> - kmemdup
> - clk_register(pll->hw) -> err_pll
>
> so the kfree for the rate-table should probably
> be at
> err_pll:
> kfree(rate_table)
Thanks for you review, I think here should be kfree(pll->rate_table)
instead of kfree(rate_table), because @rate_table is the intput param
while pll->rate_table is the new allocated memory.
v2 already sent.
> clk_unregister(mux_clk);
> ...
>
>
> Heiko
>
>> kfree(pll);
>> return mux_clk;
>> }
>>
>
>
>
>
>
> .
>
Powered by blists - more mailing lists