linux-kernel - Re: [PATCH v3 0/4] Make sscanf() stricter

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Message-ID: <ZJGvKuNq0yE/dkAJ@smile.fi.intel.com>
Date:   Tue, 20 Jun 2023 16:52:42 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Petr Mladek <pmladek@...e.com>
Cc:     David Laight <David.Laight@...lab.com>,
        'Demi Marie Obenour' <demi@...isiblethingslab.com>,
        Alexey Dobriyan <adobriyan@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Hans de Goede <hdegoede@...hat.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Juergen Gross <jgross@...e.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Oleksandr Tyshchenko <oleksandr_tyshchenko@...m.com>,
        Lee Jones <lee@...nel.org>, Andy Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Sergey Senozhatsky <senozhatsky@...omium.org>
Subject: Re: [PATCH v3 0/4] Make sscanf() stricter

On Tue, Jun 20, 2023 at 03:34:09PM +0200, Petr Mladek wrote:
> On Thu 2023-06-15 14:23:59, Andy Shevchenko wrote:
> > On Thu, Jun 15, 2023 at 08:06:46AM +0000, David Laight wrote:

...

>   + %pj or another %p modifiers would be hard to understand either.
> 
>     Yes, we have %pe but I think that only few people really use it.
>     And it is kind of self-explanatory because it is typically
>     used together with ERR_PTR() and with variables called
>     "err" or "ret".

j, besides the luck of no (yet) use in the kernel's printf(), is
described for printf(3)

  j   A  following integer conversion corresponds to an intmax_t or uintmax_t
      argument, or a following n conversion corresponds to a pointer to an
      intmax_t argument.

So, I this among all proposals, this one is the best (while all of them may
sound not good).

-- 
With Best Regards,
Andy Shevchenko