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block: fix device_add_disk() kobject_create_and_add() error handling 

Commit 83cbce9574 ("block: add error handling for device_add_disk /
add_disk") added error handling to device_add_disk(), however the goto
label for the kobject_create_and_add() failure did not set the return
value correctly, and so we can end up in a situation where
kobject_create_and_add() fails but we report success.

Fixes: 83cbce9574 ("block: add error handling for device_add_disk / add_disk")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211103164023.1384821-1-mcgrof@kernel.org
[axboe: fold in followup fix from Wu Bo <wubo40@huawei.com>]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Luis Chamberlain 2021-11-03 09:40:23 -07:00 committed by Jens Axboe
parent 10c4787015
commit fe7d064fa3
1 changed files with 6 additions and 2 deletions
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8
block/genhd.c
View File

@ -468,11 +468,15 @@ int device_add_disk(struct device *parent, struct gendisk *disk,
disk->part0->bd_holder_dir =
kobject_create_and_add("holders", &ddev->kobj);
if (!disk->part0->bd_holder_dir)
if (!disk->part0->bd_holder_dir) {
ret = -ENOMEM;
goto out_del_integrity;
}
disk->slave_dir = kobject_create_and_add("slaves", &ddev->kobj);
if (!disk->slave_dir)
if (!disk->slave_dir) {
ret = -ENOMEM;
goto out_put_holder_dir;
}
ret = bd_register_pending_holders(disk);
if (ret < 0)