dm crypt: drop device ref in ctr error path

Add a missing 'dm_put_device' in an error path in crypt target constructor.

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 64fee90bb68b..ecd9ef0418cd 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -861,7 +861,7 @@ static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv)
                 cc->iv_mode = kmalloc(strlen(ivmode) + 1, GFP_KERNEL);
                 if (!cc->iv_mode) {
                         ti->error = "Error kmallocing iv_mode string";
-                        goto bad5;
+                        goto bad_iv_mode;
                 }
                 strcpy(cc->iv_mode, ivmode);
         } else
@@ -870,6 +870,8 @@ static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv)
         ti->private = cc;
         return 0;
 
+bad_iv_mode:
+        dm_put_device(ti, cc->dev);
 bad5:
         bioset_free(cc->bs);
 bad_bs: