From: Luis Chamberlain Date: Wed, 3 Nov 2021 16:40:23 +0000 (-0700) Subject: block: fix device_add_disk() kobject_create_and_add() error handling X-Git-Tag: v6.1-rc5~2683^2~5 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=fe7d064fa3faec5d8157029fb8720b4fddc9e1e8;p=platform%2Fkernel%2Flinux-starfive.git block: fix device_add_disk() kobject_create_and_add() error handling 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 Reported-by: Dan Carpenter Signed-off-by: Luis Chamberlain Reviewed-by: Christoph Hellwig Link: https://lore.kernel.org/r/20211103164023.1384821-1-mcgrof@kernel.org [axboe: fold in followup fix from Wu Bo ] Signed-off-by: Jens Axboe --- diff --git a/block/genhd.c b/block/genhd.c index 64f83c4..8ea818a 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -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)