diff -drupN a/lib/digsig.c b/lib/digsig.c
--- a/lib/digsig.c	2018-08-06 17:23:04.000000000 +0300
+++ b/lib/digsig.c	2022-06-12 05:28:14.000000000 +0300
@@ -85,7 +85,7 @@ static int digsig_verify_rsa(struct key
 	struct pubkey_hdr *pkh;
 
 	down_read(&key->sem);
-	ukp = user_key_payload(key);
+	ukp = user_key_payload_locked(key);
 
 	if (!ukp) {
 		/* key was revoked before we acquired its semaphore */