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nbd: fix a block_device refcount leak in nbd_release
bdget_disk needs to be paired with bdput to not leak a reference
on the block device inode.
Fixes: 08ba91ee6e
("nbd: Add the nbd NBD_DISCONNECT_ON_CLOSE config flag.")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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@ -1518,6 +1518,7 @@ static void nbd_release(struct gendisk *disk, fmode_t mode)
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if (test_bit(NBD_RT_DISCONNECT_ON_CLOSE, &nbd->config->runtime_flags) &&
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bdev->bd_openers == 0)
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nbd_disconnect_and_put(nbd);
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bdput(bdev);
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nbd_config_put(nbd);
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nbd_put(nbd);
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