linux-hardening - Re: [PATCH 4/9] time: test: Fix incorrect format specifier

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Date: Wed, 21 Feb 2024 21:06:28 +0000
From: Justin Stitt <justinstitt@...gle.com>
To: David Gow <davidgow@...gle.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
	Shuah Khan <skhan@...uxfoundation.org>,
	Guenter Roeck <linux@...ck-us.net>, Rae Moar <rmoar@...gle.com>,
	Matthew Auld <matthew.auld@...el.com>,
	Arunpravin Paneer Selvam <arunpravin.paneerselvam@....com>,
	Christian König <christian.koenig@....com>,
	Kees Cook <keescook@...omium.org>,
	Maíra Canal <mcanal@...lia.com>,
	Rodrigo Vivi <rodrigo.vivi@...el.com>,
	Matthew Brost <matthew.brost@...el.com>,
	Willem de Bruijn <willemb@...gle.com>,
	Florian Westphal <fw@...len.de>,
	Cassio Neri <cassio.neri@...il.com>,
	Javier Martinez Canillas <javierm@...hat.com>,
	Arthur Grillo <arthur.grillo@....br>,
	Brendan Higgins <brendan.higgins@...ux.dev>,
	Daniel Latypov <dlatypov@...gle.com>,
	Stephen Boyd <sboyd@...nel.org>, David Airlie <airlied@...il.com>,
	Maxime Ripard <mripard@...nel.org>,
	"David S . Miller" <davem@...emloft.net>,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	intel-xe@...ts.freedesktop.org, linux-rtc@...r.kernel.org,
	linux-kselftest@...r.kernel.org, kunit-dev@...glegroups.com,
	linux-hardening@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 4/9] time: test: Fix incorrect format specifier

Hi,

On Wed, Feb 21, 2024 at 05:27:17PM +0800, David Gow wrote:
> 'days' is a s64 (from div_s64), and so should use a %lld specifier.
>
> This was found by extending KUnit's assertion macros to use gcc's
> __printf attribute.
>
> Fixes: 276010551664 ("time: Improve performance of time64_to_tm()")
> Signed-off-by: David Gow <davidgow@...gle.com>

Reviewed-by: Justin Stitt <justinstitt@...gle.com>
> ---
>  kernel/time/time_test.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/kernel/time/time_test.c b/kernel/time/time_test.c
> index ca058c8af6ba..3e5d422dd15c 100644
> --- a/kernel/time/time_test.c
> +++ b/kernel/time/time_test.c
> @@ -73,7 +73,7 @@ static void time64_to_tm_test_date_range(struct kunit *test)
>
>  		days = div_s64(secs, 86400);
>
> -		#define FAIL_MSG "%05ld/%02d/%02d (%2d) : %ld", \
> +		#define FAIL_MSG "%05ld/%02d/%02d (%2d) : %lld", \
>  			year, month, mdday, yday, days
>
>  		KUNIT_ASSERT_EQ_MSG(test, year - 1900, result.tm_year, FAIL_MSG);
> --
> 2.44.0.rc0.258.g7320e95886-goog
>

Thanks
Justin