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@xxxxxxxxxx> --- 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@xxxxxxxxxx>