linux-kernel - Re: [PATCH 05/10] gpio: mockup: improve the debugfs input sanitization

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Message-ID: <CAHp75Vfx_Ft50ha1FNzzLi-Pp8ex27M05-bChn-uLBZ7H_ThNg@mail.gmail.com>
Date:   Sat, 27 May 2017 19:45:41 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Alexandre Courbot <gnurou@...il.com>,
        Bamvor Jian Zhang <bamvor.zhangjian@...aro.org>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 05/10] gpio: mockup: improve the debugfs input sanitization

On Thu, May 25, 2017 at 11:33 AM, Bartosz Golaszewski <brgl@...ev.pl> wrote:
> We're currently only checking the first character of the input to the
> debugfs event files, so a string like '0sdfdsf' is valid and indicates
> a falling edge event.
>
> Be more strict and only allow '0', '1', '0\n' & '1\n'.

Why not to be so strict and use

kstrtobool_from_user();

instead?

-- 
With Best Regards,
Andy Shevchenko