From: Luis Chamberlain mcgrof@kernel.org
[ Upstream commit fe7d064fa3faec5d8157029fb8720b4fddc9e1e8 ]
Commit 83cbce957446 ("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: 83cbce957446 ("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 Signed-off-by: Sasha Levin sashal@kernel.org --- block/genhd.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/block/genhd.c b/block/genhd.c index ab12ae6e636e8..6accd0b185e9e 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -467,11 +467,15 @@ 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)