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Commit 81dcfdb9 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Greg Kroah-Hartman
Browse files

nbd: fix a block_device refcount leak in nbd_release 



[ Upstream commit 2bd645b2d3f0bacadaa6037f067538e1cd4e42ef ]

bdget_disk needs to be paired with bdput to not leak a reference
on the block device inode.

Fixes: 08ba91ee ("nbd: Add the nbd NBD_DISCONNECT_ON_CLOSE config flag.")
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarJosef Bacik <josef@toxicpanda.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent c602ad2b

drivers/block/nbd.c

+1 −0
Original line number Diff line number Diff line
@@ -1503,6 +1503,7 @@ static void nbd_release(struct gendisk *disk, fmode_t mode) 
	if (test_bit(NBD_RT_DISCONNECT_ON_CLOSE, &nbd->config->runtime_flags) &&

			bdev->bd_openers == 0)

		nbd_disconnect_and_put(nbd);

	bdput(bdev);



	nbd_config_put(nbd);

	nbd_put(nbd);