linux-kernel - Re: Re: [PATCH] clk: imx: clk-imx8mm: fix memory leak issue in 'imx8mm_clocks

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Date:   Fri, 14 Apr 2023 10:02:19 +0800 (GMT+08:00)
From:   周师德 <u201911681@...t.edu.cn>
To:     "stephen boyd" <sboyd@...nel.org>
Cc:     "abel vesa" <abelvesa@...nel.org>, "bai ping" <ping.bai@....com>,
        "fabio estevam" <festevam@...il.com>,
        "michael turquette" <mturquette@...libre.com>,
        "nxp linux team" <linux-imx@....com>,
        "peng fan" <peng.fan@....com>,
        "pengutronix kernel team" <kernel@...gutronix.de>,
        "sascha hauer" <s.hauer@...gutronix.de>,
        "shawn guo" <shawnguo@...nel.org>,
        hust-os-kernel-patches@...glegroups.com, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        "hao luo" <m202171776@...t.edu.cn>
Subject: Re: Re: [PATCH] clk: imx: clk-imx8mm: fix memory leak issue in
 'imx8mm_clocks_probe'




> -----原始邮件-----
> 发件人: "Stephen Boyd" <sboyd@...nel.org>
> 发送时间: 2023-04-14 03:06:59 (星期五)
> 收件人: "Abel Vesa" <abelvesa@...nel.org>, "Bai Ping" <ping.bai@....com>, "Fabio Estevam" <festevam@...il.com>, "Michael Turquette" <mturquette@...libre.com>, "NXP Linux Team" <linux-imx@....com>, "Peng Fan" <peng.fan@....com>, "Pengutronix Kernel Team" <kernel@...gutronix.de>, "Sascha Hauer" <s.hauer@...gutronix.de>, "Shawn Guo" <shawnguo@...nel.org>, "Zhou Shide" <u201911681@...t.edu.cn>
> 抄送: hust-os-kernel-patches@...glegroups.com, "Zhou Shide" <u201911681@...t.edu.cn>, linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, "Hao Luo" <m202171776@...t.edu.cn>
> 主题: Re: [PATCH] clk: imx: clk-imx8mm: fix memory leak issue in 'imx8mm_clocks_probe'
> 
> Quoting Zhou Shide (2023-04-12 20:24:39)
> > The function imx8mm_clocks_probe() has two main issues:
> > - The of_iomap() function may cause a memory leak.
> > - Memory allocated for 'clk_hw_data' may not be freed properly
> > in some paths.
> > 
> > To fix these issues, this commit replaces the use of of_iomap()
> > with devm_of_iomap() and replaces kzalloc() with devm_kzalloc().
> > This ensures that all memory is properly managed and automatically
> > freed when the device is removed.
> > 
> > In addition, when devm_of_iomap() allocates memory with an error,
> > it will first jump to label "unregister_hws" and
> > then return PTR_ ERR(base).
> > 
> > Fixes: 9c71f9ea35d7 ("clk: imx: imx8mm: Switch to clk_hw based API")
> > Fixes: ba5625c3e272 ("clk: imx: Add clock driver support for imx8mm")
> > Signed-off-by: Zhou Shide <u201911681@...t.edu.cn>
> > ---
> > The issue is discovered by static analysis, and the patch is not tested yet.
> 
> And you're not coordinating with each other?
What do you mean by "coordinating with each other"?

regards,
Zhou Shide