diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index bbed2fd40fdcd59d125e269afde868880c495724..67e8b16f7bcb752215a8ac235a7090e2616e14ef 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -1847,6 +1847,7 @@ ecryptfs_add_new_key_tfm(struct ecryptfs_key_tfm **key_tfm, char *cipher_name,
 	mutex_init(&tmp_tfm->key_tfm_mutex);
 	strncpy(tmp_tfm->cipher_name, cipher_name,
 		ECRYPTFS_MAX_CIPHER_NAME_SIZE);
+	tmp_tfm->cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE] = '\0';
 	tmp_tfm->key_size = key_size;
 	rc = ecryptfs_process_key_cipher(&tmp_tfm->key_tfm,
 					 tmp_tfm->cipher_name,