netdev - [PATCH 3/9] lib: memcpy_kunit: Fix an invalid format specifier in an assertion msg

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Date: Wed, 21 Feb 2024 17:27:16 +0800
From: David Gow <davidgow@...gle.com>
To: 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>
Cc: David Gow <davidgow@...gle.com>, 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: [PATCH 3/9] lib: memcpy_kunit: Fix an invalid format specifier in an
 assertion msg

The 'i' passed as an assertion message is a size_t, so should use '%zu',
not '%d'.

This was found by annotating the _MSG() variants of KUnit's assertions
to let gcc validate the format strings.

Fixes: bb95ebbe89a7 ("lib: Introduce CONFIG_MEMCPY_KUNIT_TEST")
Signed-off-by: David Gow <davidgow@...gle.com>
---
 lib/memcpy_kunit.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/memcpy_kunit.c b/lib/memcpy_kunit.c
index 440aee705ccc..30e00ef0bf2e 100644
--- a/lib/memcpy_kunit.c
+++ b/lib/memcpy_kunit.c
@@ -32,7 +32,7 @@ struct some_bytes {
 	BUILD_BUG_ON(sizeof(instance.data) != 32);	\
 	for (size_t i = 0; i < sizeof(instance.data); i++) {	\
 		KUNIT_ASSERT_EQ_MSG(test, instance.data[i], v, \
-			"line %d: '%s' not initialized to 0x%02x @ %d (saw 0x%02x)\n", \
+			"line %d: '%s' not initialized to 0x%02x @ %zu (saw 0x%02x)\n", \
 			__LINE__, #instance, v, i, instance.data[i]);	\
 	}	\
 } while (0)
@@ -41,7 +41,7 @@ struct some_bytes {
 	BUILD_BUG_ON(sizeof(one) != sizeof(two)); \
 	for (size_t i = 0; i < sizeof(one); i++) {	\
 		KUNIT_EXPECT_EQ_MSG(test, one.data[i], two.data[i], \
-			"line %d: %s.data[%d] (0x%02x) != %s.data[%d] (0x%02x)\n", \
+			"line %d: %s.data[%zu] (0x%02x) != %s.data[%zu] (0x%02x)\n", \
 			__LINE__, #one, i, one.data[i], #two, i, two.data[i]); \
 	}	\
 	kunit_info(test, "ok: " TEST_OP "() " name "\n");	\
-- 
2.44.0.rc0.258.g7320e95886-goog