diff -drupN a/security/keys/trusted.c b/security/keys/trusted.c
--- a/security/keys/trusted.c	2018-08-06 17:23:04.000000000 +0300
+++ b/security/keys/trusted.c	2022-06-12 05:28:14.000000000 +0300
@@ -1139,15 +1139,14 @@ out:
 static long trusted_read(const struct key *key, char __user *buffer,
 			 size_t buflen)
 {
-	struct trusted_key_payload *p;
+	const struct trusted_key_payload *p;
 	char *ascii_buf;
 	char *bufp;
 	int i;
 
-	p = rcu_dereference_key(key);
+	p = dereference_key_locked(key);
 	if (!p)
 		return -EINVAL;
-
 	if (buffer && buflen >= 2 * p->blob_len) {
 		ascii_buf = kmalloc(2 * p->blob_len, GFP_KERNEL);
 		if (!ascii_buf)