landlock: Use mem_is_zero() in is_layer_masks_allowed()

gnoack · l0kod · commit 1c4fe8736478 · 2026-04-07T18:51:06.000+02:00
This is equivalent, but expresses the intent a bit clearer. Signed-off-by: Günther Noack <gnoack3000@gmail.com> Link: https://lore.kernel.org/r/20260327164838.38231-3-gnoack3000@gmail.com Signed-off-by: Mickaël Salaün <mic@digikod.net>
diff --git a/security/landlock/fs.c b/security/landlock/fs.c
@@ -564,7 +564,7 @@ static void test_no_more_access(struct kunit *const test)
 
 static bool is_layer_masks_allowed(const struct layer_access_masks *masks)
 {
-	return !memchr_inv(&masks->access, 0, sizeof(masks->access));
+	return mem_is_zero(&masks->access, sizeof(masks->access));
 }
 
 /*

Original file line number	Diff line number	Diff line change
`@@ -564,7 +564,7 @@ static void test_no_more_access(struct kunit *const test)`
`564`	`564`
`565`	`565`	`static bool is_layer_masks_allowed(const struct layer_access_masks *masks)`
`566`	`566`	`{`
`567`		`- return !memchr_inv(&masks->access, 0, sizeof(masks->access));`
	`567`	`+ return mem_is_zero(&masks->access, sizeof(masks->access));`
`568`	`568`	`}`
`569`	`569`
`570`	`570`	`/*`