dm-crypt: Fix memory leak in crypt_ctr_cipher_old()

Fix memory leak of cipher_api.

Fixes: 33d2f09fcb35 (dm crypt: introduce new format of cipher with "capi:" prefix)
Signed-off-by: Jeffy Chen <redacted>
---

 drivers/md/dm-crypt.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index a55ffd4f5933..04be8ce1742e 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c

@@ -2467,6 +2467,7 @@ static int crypt_ctr_cipher_old(struct dm_target *ti, char *cipher_in, char *key
 		return ret;
 	}
 
+	kfree(cipher_api);
 	return 0;
 bad_mem:
 	ti->error = "Cannot allocate cipher strings";

-- 
2.11.0