linux-hardening - Re: [PATCH 5/9] rtc: test: Fix invalid format specifier.

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Date: Wed, 21 Feb 2024 05:26:06 -0800
From: Guenter Roeck <linux@...ck-us.net>
To: David Gow <davidgow@...gle.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
	Shuah Khan <skhan@...uxfoundation.org>, 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 5/9] rtc: test: Fix invalid format specifier.

On Wed, Feb 21, 2024 at 05:27:18PM +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: 1d1bb12a8b18 ("rtc: Improve performance of rtc_time64_to_tm(). Add tests.")
> Signed-off-by: David Gow <davidgow@...gle.com>

Tested-by: Guenter Roeck <linux@...ck-us.net>

> ---
>  drivers/rtc/lib_test.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/rtc/lib_test.c b/drivers/rtc/lib_test.c
> index d5caf36c56cd..225c859d6da5 100644
> --- a/drivers/rtc/lib_test.c
> +++ b/drivers/rtc/lib_test.c
> @@ -54,7 +54,7 @@ static void rtc_time64_to_tm_test_date_range(struct kunit *test)
>  
>  		days = div_s64(secs, 86400);
>  
> -		#define FAIL_MSG "%d/%02d/%02d (%2d) : %ld", \
> +		#define FAIL_MSG "%d/%02d/%02d (%2d) : %lld", \
>  			year, month, mday, yday, days
>  
>  		KUNIT_ASSERT_EQ_MSG(test, year - 1900, result.tm_year, FAIL_MSG);
> -- 
> 2.44.0.rc0.258.g7320e95886-goog
>