linux-kernel - [PATCH] drm/tests: Zero initialize fourccs

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Message-Id: <20230901-zero-init-fourcc-list-test-v1-1-68bc4cc738c8@riseup.net>
Date:   Fri, 01 Sep 2023 15:52:56 -0300
From:   Arthur Grillo <arthurgrillo@...eup.net>
To:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Cc:     tales.aparecida@...il.com, andrealmeid@...eup.net,
        mairacanal@...eup.net, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Javier Martinez Canillas <javierm@...hat.com>,
        José Expósito <jose.exposito89@...il.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Arthur Grillo <arthurgrillo@...eup.net>
Subject: [PATCH] drm/tests: Zero initialize fourccs_out

fourccs_out array is not initialized. As the
drm_fb_build_fourcc_list() doesn't necessarily change all the array,
and the test compares all of it, the comparison could fail if the
array is not initialized. Zero initialize the array to fix this.

Fixes: 371e0b186a13 ("drm/tests: Add KUnit tests for drm_fb_build_fourcc_list()")
Signed-off-by: Arthur Grillo <arthurgrillo@...eup.net>
---
 drivers/gpu/drm/tests/drm_format_helper_test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/tests/drm_format_helper_test.c b/drivers/gpu/drm/tests/drm_format_helper_test.c
index 79bc9d4bbd71..1a6bd291345d 100644
--- a/drivers/gpu/drm/tests/drm_format_helper_test.c
+++ b/drivers/gpu/drm/tests/drm_format_helper_test.c
@@ -1165,7 +1165,7 @@ KUNIT_ARRAY_PARAM(fb_build_fourcc_list, fb_build_fourcc_list_cases, fb_build_fou
 static void drm_test_fb_build_fourcc_list(struct kunit *test)
 {
 	const struct fb_build_fourcc_list_case *params = test->param_value;
-	u32 fourccs_out[TEST_BUF_SIZE];
+	u32 fourccs_out[TEST_BUF_SIZE] = {0};
 	size_t nfourccs_out;
 	struct drm_device *drm;
 	struct device *dev;

---
base-commit: 8e455145d8f163aefa6b9cc29478e0a9f82276e6
change-id: 20230901-zero-init-fourcc-list-test-2c934b6b7eb8

Best regards,
-- 
Arthur Grillo <arthurgrillo@...eup.net>