From: Andy Shevchenko <andriy.shevchenko@intel.com>
To: Feng Jiang <jiangfeng@kylinos.cn>
Cc: pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu,
alex@ghiti.fr, kees@kernel.org, andy@kernel.org,
akpm@linux-foundation.org, ebiggers@kernel.org,
martin.petersen@oracle.com, ardb@kernel.org,
ajones@ventanamicro.com, conor.dooley@microchip.com,
samuel.holland@sifive.com, linus.walleij@linaro.org,
nathan@kernel.org, linux-riscv@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org
Subject: Re: [PATCH v2 06/14] lib/string_kunit: add correctness test for strnlen
Date: Tue, 13 Jan 2026 10:41:51 +0200 [thread overview]
Message-ID: <aWYFT1yoktjDLFTm@smile.fi.intel.com> (raw)
In-Reply-To: <20260113082748.250916-7-jiangfeng@kylinos.cn>
On Tue, Jan 13, 2026 at 04:27:40PM +0800, Feng Jiang wrote:
> Add a KUnit test for strnlen() to verify correctness across
> different string lengths and memory alignments.
...
> + for (offset = 0; offset < STRING_TEST_MAX_OFFSET; offset++) {
> + for (len = 0; len <= STRING_TEST_MAX_LEN; len++) {
> + s[offset + len] = '\0';
This should be one or two characters further so you check should also check for
non-NUL terminated strings...
> + if (len > 0)
> + KUNIT_EXPECT_EQ(test, strnlen(s + offset, len - 1), len - 1);
...or make more tests, with len - 2 at least.
> + KUNIT_EXPECT_EQ(test, strnlen(s + offset, len), len);
> + KUNIT_EXPECT_EQ(test, strnlen(s + offset, len + 1), len);
I would also add + 2 test case.
> + KUNIT_EXPECT_EQ(test, strnlen(s + offset, len + 10), len);
> + s[offset + len] = 'A';
> + }
> + }
> +}
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2026-01-13 8:41 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-13 8:27 [PATCH v2 00/14] riscv: optimize string functions and add kunit tests Feng Jiang
2026-01-13 8:27 ` [PATCH v2 01/14] lib/string: extract generic strlen() into __generic_strlen() Feng Jiang
2026-01-13 8:33 ` Andy Shevchenko
2026-01-14 0:01 ` Eric Biggers
2026-01-14 1:41 ` Feng Jiang
2026-01-14 7:07 ` Andy Shevchenko
2026-01-14 10:10 ` David Laight
2026-01-15 6:50 ` Feng Jiang
2026-01-15 6:55 ` Andy Shevchenko
2026-01-13 8:27 ` [PATCH v2 02/14] lib/string: extract generic strnlen() into __generic_strnlen() Feng Jiang
2026-01-13 8:27 ` [PATCH v2 03/14] lib/string: extract generic strchr() into __generic_strchr() Feng Jiang
2026-01-13 8:27 ` [PATCH v2 04/14] lib/string: extract generic strrchr() into __generic_strrchr() Feng Jiang
2026-01-13 8:27 ` [PATCH v2 05/14] lib/string_kunit: add correctness test for strlen Feng Jiang
2026-01-13 8:27 ` [PATCH v2 06/14] lib/string_kunit: add correctness test for strnlen Feng Jiang
2026-01-13 8:41 ` Andy Shevchenko [this message]
2026-01-13 8:27 ` [PATCH v2 07/14] lib/string_kunit: add correctness test for strrchr() Feng Jiang
2026-01-13 8:27 ` [PATCH v2 08/14] lib/string_kunit: add performance benchmark for strlen() Feng Jiang
2026-01-13 8:46 ` Andy Shevchenko
2026-01-14 6:14 ` Feng Jiang
2026-01-14 7:04 ` Feng Jiang
2026-01-14 7:21 ` Andy Shevchenko
2026-01-14 8:05 ` Feng Jiang
2026-01-14 10:21 ` David Laight
2026-01-15 6:24 ` Feng Jiang
2026-01-15 10:40 ` David Laight
2026-01-18 11:11 ` kernel test robot
2026-01-13 8:27 ` [PATCH v2 09/14] lib/string_kunit: add performance benchmark for strnlen() Feng Jiang
2026-01-13 8:27 ` [PATCH v2 10/14] lib/string_kunit: add performance benchmark for strchr() Feng Jiang
2026-01-13 8:27 ` [PATCH v2 11/14] lib/string_kunit: add performance benchmark for strrchr() Feng Jiang
2026-01-13 8:27 ` [PATCH v2 12/14] riscv: lib: add strnlen implementation Feng Jiang
2026-01-13 8:48 ` Andy Shevchenko
2026-01-13 8:27 ` [PATCH v2 13/14] riscv: lib: add strchr implementation Feng Jiang
2026-01-13 8:27 ` [PATCH v2 14/14] riscv: lib: add strrchr implementation Feng Jiang
2026-01-13 8:52 ` [PATCH v2 00/14] riscv: optimize string functions and add kunit tests Andy Shevchenko
2026-01-15 4:43 ` Joel Stanley
2026-01-19 9:24 ` Feng Jiang
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