[PATCH] security: keys: add __randomize_layout to keyring_search_context

[GONG, Ruiqi]

Struct keyring_search_context contains a pointer to `struct cred`, which
is a security-critical structure and whose layout is randomized already.
Apply __randomize_layout to struct keyring_search_context as well, as
suggested in [1].

[1]: https://github.com/KSPP/linux/issues/188

Signed-off-by: GONG, Ruiqi <gongruiqi1@xxxxxxxxxx>
---
 security/keys/internal.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/security/keys/internal.h b/security/keys/internal.h
index 9b9cf3b6fcbb..3e3def5fbaa4 100644
--- a/security/keys/internal.h
+++ b/security/keys/internal.h
@@ -136,7 +136,7 @@ struct keyring_search_context {
 	bool			possessed;
 	key_ref_t		result;
 	time64_t		now;
-};
+} __randomize_layout;
 
 extern bool key_default_cmp(const struct key *key,
 			    const struct key_match_data *match_data);
-- 
2.17.1