* [PATCH] nbd: fix a block_device refcount leak in nbd_release
@ 2020-11-09 17:30 Christoph Hellwig
2020-11-09 18:02 ` Josef Bacik
2020-11-10 15:01 ` Jens Axboe
0 siblings, 2 replies; 3+ messages in thread
From: Christoph Hellwig @ 2020-11-09 17:30 UTC (permalink / raw)
To: josef; +Cc: linux-block, nbd
bdget_disk needs to be paired with bdput to not leak a reference
on the block device inode.
Fixes: 08ba91ee6e2c ("nbd: Add the nbd NBD_DISCONNECT_ON_CLOSE config flag.")
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/block/nbd.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index a6f51934391edb..45b0423ef2c53d 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -1493,6 +1493,7 @@ 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);
--
2.28.0
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2020-11-09 17:30 [PATCH] nbd: fix a block_device refcount leak in nbd_release Christoph Hellwig
2020-11-09 18:02 ` Josef Bacik
2020-11-10 15:01 ` Jens Axboe
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