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

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Message-ID: <ec3d7ebe62654e949329785bb32c3822@AcuMS.aculab.com>
Date:   Tue, 13 Jun 2023 13:02:59 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Demi Marie Obenour' <demi@...isiblethingslab.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
CC:     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>,
        Petr Mladek <pmladek@...e.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Sergey Senozhatsky <senozhatsky@...omium.org>
Subject: RE: [PATCH v3 0/4] Make sscanf() stricter

From: Demi Marie Obenour
> Sent: 12 June 2023 22:23
....
> sscanf(), except to the extent that -Werror=format can keep working.
> Userspace sscanf() is almost useless: it has undefined behavior on
> integer overflow and swallows spaces that should usually be rejected.

scanf() is designed for parsing space separated data.
Eating spaces it part of its job description.

	David

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