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>
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@ -1181,9 +1181,9 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
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out_unlock_bdev:
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mutex_unlock(&bdev->bd_mutex);
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disk_unblock_events(disk);
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out:
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module_put(disk->fops->owner);
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put_disk(disk);
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out:
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bdput(bdev);
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return ret;
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