Index: head/sys/crypto/armv8/armv8_crypto.c
===================================================================
--- head/sys/crypto/armv8/armv8_crypto.c
+++ head/sys/crypto/armv8/armv8_crypto.c
@@ -274,9 +274,11 @@
 	error = armv8_crypto_cipher_setup(ses, encini);
 	if (error != 0) {
 		CRYPTDEB("setup failed");
+		rw_wunlock(&sc->lock);
 		return (error);
 	}
 
+	rw_wunlock(&sc->lock);
 	return (0);
 }