block: NULL dereference on error path in __blkdev_get()

"disk" is always NULL when we goto out.  There was a check for this
before, but it was removed in 69e02c59a7d9 "block: Don't check events
while open is in progress".

Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@carl>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/block_dev.c b/fs/block_dev.c
index fbe05cbdd692..7d02afb2b7f4 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1181,9 +1181,9 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
  out_unlock_bdev:
         mutex_unlock(&bdev->bd_mutex);
         disk_unblock_events(disk);
- out:
         module_put(disk->fops->owner);
         put_disk(disk);
+ out:
         bdput(bdev);
 
         return ret;