From: Andy Shevchenko <andriy.shevchenko@intel.com>
To: Dmitry Antipov <dmantipov@yandex.ru>
Cc: Andrew Morton <akpm@linux-foundation.org>,
David Laight <david.laight.linux@gmail.com>,
Kees Cook <kees@kernel.org>,
"Darrick J . Wong" <djwong@kernel.org>,
linux-hardening@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v7 1/5] lib: fix _parse_integer_limit() to handle overflow
Date: Thu, 12 Feb 2026 15:41:59 +0200 [thread overview]
Message-ID: <aY3Yp89R1cl-sacD@smile.fi.intel.com> (raw)
In-Reply-To: <20260212125628.739276-2-dmantipov@yandex.ru>
On Thu, Feb 12, 2026 at 03:56:24PM +0300, Dmitry Antipov wrote:
> In '_parse_integer_limit()', adjust native integer arithmetic
> with near-to-overflow branch where 'check_mul_overflow()' and
> 'check_add_overflow()' are used to check whether an intermediate
> result goes out of range, and denote such a case with ULLONG_MAX,
> thus making the function more similar to standard C library's
> 'strtoull()'. Adjust comment to kernel-doc style as well.
...
> + for (rv = 0; max_chars--; rv++, s++) {
Hmm... is max_chars being used inside for-loop body? I would rather use regular
pattern here:
for (rv = 0; rv < max_chars; rv++, s++) {
(just check that any integer / sign promotion doesn't change the logic).
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2026-02-12 13:42 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-12 12:56 [PATCH v7 0/5] lib and lib/cmdline enhancements Dmitry Antipov
2026-02-12 12:56 ` [PATCH v7 1/5] lib: fix _parse_integer_limit() to handle overflow Dmitry Antipov
2026-02-12 13:41 ` Andy Shevchenko [this message]
2026-02-12 14:32 ` David Laight
2026-02-12 14:45 ` Andy Shevchenko
2026-02-12 13:51 ` David Laight
2026-02-12 12:56 ` [PATCH v7 2/5] lib: fix memparse() " Dmitry Antipov
2026-02-12 13:36 ` Andy Shevchenko
2026-02-12 12:56 ` [PATCH v7 3/5] lib: add more string to 64-bit integer conversion overflow tests Dmitry Antipov
2026-02-12 12:56 ` [PATCH v7 4/5] lib/cmdline_kunit: add test case for memparse() Dmitry Antipov
2026-02-12 12:56 ` [PATCH v7 5/5] lib/cmdline: adjust a few comments to fix kernel-doc -Wreturn warnings Dmitry Antipov
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