linux-kernel - Re: clk: samsung: Checking a kmemdup() call in _samsung_clk_register

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] [day] [month] [year] [list]

Date:   Mon, 14 Oct 2019 10:05:09 +0200
From:   Markus Elfring <Markus.Elfring@....de>
To:     Chanwoo Choi <cw00.choi@...sung.com>, linux-clk@...r.kernel.org,
        linux-samsung-soc@...r.kernel.org, kernel-janitors@...r.kernel.org
Cc:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Aditya Pakki <pakki001@....edu>, Kangjie Lu <kjlu@....edu>,
        Navid Emamdoost <emamd001@....edu>,
        Stephen McCamant <smccaman@....edu>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: clk: samsung: Checking a kmemdup() call in
 _samsung_clk_register_pll()

>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/clk/samsung/clk-pll.c?id=1c0cc5f1ae5ee5a6913704c0d75a6e99604ee30a#n1275
>> https://protect2.fireeye.com/url?k=7e77b0ebee9a0c3e.7e763ba4-43f341fdfe1d32b1&u=https://elixir.bootlin.com/linux/v5.4-rc2/source/drivers/clk/samsung/clk-pll.c#L1275
…
> drivers/clk/samsung/clk-pll.c considers the case of 'pll->rate_table is NULL'
> So, maybe just show the warning message if failed to allocate memory
> of 'pll->rate_table'.

How do you think about to recheck information sources around
the Linux allocation failure report?
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/coding-style.rst?id=da94001239cceb93c132a31928d6ddc4214862d5#n878


> Bu, IMHO, the error handling is necessary in order to support
> what 'pll_clk->rate_table' isn't NULL.

Can an other error handling strategy make sense at this place?

Regards,
Markus