# \[PATCH v4 09/12\] KEYS: link secondary\_trusted\_keys to mok trusted keys

- From: Eric Snowberg \<eric.snowberg@oracle.com\>
- Date: 2021-08-19 00:22:50 
- List: linux-crypto
- Page: https://ratatoskr.run/linux-crypto/2021/08/1482274
- Thread: https://ratatoskr.run/keyrings/2021/08/1482265/t.md

```text
Allow the .mok keyring to be linked to the secondary_trusted_keys.  After
the link is created, keys contained in the .mok keyring will automatically
be searched when searching secondary_trusted_keys.

Signed-off-by: Eric Snowberg <eric.snowberg@oracle.com>
---
v3: Initial version
v4: Unmodified from v3
---
 certs/system_keyring.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/certs/system_keyring.c b/certs/system_keyring.c
index 1c39af137cf1..4ce39b4ccc04 100644
--- a/certs/system_keyring.c
+++ b/certs/system_keyring.c
@@ -101,6 +101,9 @@ static __init struct key_restriction *get_builtin_and_secondary_restriction(void
 void __init set_mok_trusted_keys(struct key *keyring)
 {
 	mok_trusted_keys = keyring;
+
+	if (key_link(secondary_trusted_keys, mok_trusted_keys) < 0)
+		panic("Can't link (mok) trusted keyrings\n");
 }
 
 /**
-- 
2.18.4

```