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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <25b06794ffb595229019640e10f256fd.sboyd@kernel.org>
Date:   Thu, 13 Apr 2023 12:06:59 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     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>
Cc:     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>
Subject: 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?