dm crypt: use kzfree

Use kzfree() instead of memset() + kfree().

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index bfefd079a955..53394e863c74 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -1156,8 +1156,7 @@ bad_ivmode:
         crypto_free_ablkcipher(tfm);
 bad_cipher:
         /* Must zero key material before freeing */
-        memset(cc, 0, sizeof(*cc) + cc->key_size * sizeof(u8));
-        kfree(cc);
+        kzfree(cc);
         return -EINVAL;
 }
 
@@ -1183,8 +1182,7 @@ static void crypt_dtr(struct dm_target *ti)
         dm_put_device(ti, cc->dev);
 
         /* Must zero key material before freeing */
-        memset(cc, 0, sizeof(*cc) + cc->key_size * sizeof(u8));
-        kfree(cc);
+        kzfree(cc);
 }
 
 static int crypt_map(struct dm_target *ti, struct bio *bio,