From: Andy Shevchenko <andriy.shevchenko@intel.com>
To: Dmitry Antipov <dmantipov@yandex.ru>
Cc: David Laight <david.laight.linux@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
Kees Cook <kees@kernel.org>,
"Darrick J . Wong" <djwong@kernel.org>,
linux-hardening@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v5 1/5] lib: fix _parse_integer_limit() to handle overflow
Date: Fri, 6 Feb 2026 12:11:43 +0200 [thread overview]
Message-ID: <aYW-X-uss7n4S6Em@smile.fi.intel.com> (raw)
In-Reply-To: <8bd4317ef717016ca5d921a96b15808b6c77845a.camel@yandex.ru>
On Fri, Feb 06, 2026 at 12:53:50PM +0300, Dmitry Antipov wrote:
> On Fri, 2026-02-06 at 09:42 +0200, Andy Shevchenko wrote:
>
> > > Code looking at the terminating character wont be expecting a digit
> > > and will treat it as a syntax error - which is what you are trying to do.
> > >
> > > That is a much easier API to use, and a 'drop-in' for existing code.
> >
> > Maybe, but problematic from the usage point of view as I described above.
>
> Note that was an idea behihd memvalue(), see https://lists.openwall.net/linux-hardening/2026/01/07/23.
> IOW since "mem=64K" is expected to be used more often than, say, "mem=64K@0xaaaaa" or "mem=64K,sync",
> it may be useful to have a wrapper which is enough to parse "64K" but treat everything else as error.
It will make it less useful.
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2026-02-06 10:11 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-04 13:57 [PATCH v5 0/5] lib and lib/cmdline enhancements Dmitry Antipov
2026-02-04 13:57 ` [PATCH v5 1/5] lib: fix _parse_integer_limit() to handle overflow Dmitry Antipov
2026-02-04 14:31 ` Andy Shevchenko
2026-02-05 9:04 ` Dmitry Antipov
2026-02-05 16:03 ` Andy Shevchenko
2026-02-05 22:15 ` David Laight
2026-02-06 7:42 ` Andy Shevchenko
2026-02-06 9:53 ` Dmitry Antipov
2026-02-06 10:11 ` Andy Shevchenko [this message]
2026-02-04 13:57 ` [PATCH v5 2/5] lib: fix memparse() " Dmitry Antipov
2026-02-04 14:42 ` Andy Shevchenko
2026-02-05 9:17 ` Dmitry Antipov
2026-02-05 16:05 ` Andy Shevchenko
2026-02-04 13:57 ` [PATCH v5 3/5] lib: add more string to 64-bit integer conversion overflow tests Dmitry Antipov
2026-02-04 13:57 ` [PATCH v5 4/5] lib/cmdline_kunit: add test case for memparse() Dmitry Antipov
2026-02-04 13:57 ` [PATCH v5 5/5] lib/cmdline: adjust a few comments to fix kernel-doc -Wreturn warnings Dmitry Antipov
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