[PATCH 1/2] block :blk-sysfs :fix kobj refcount imbalance on the err return path

[Lin Yi <teroincn@xxxxxxx>]

kobject_add takes a refcount to the object dev->kobj, but forget to
release it before return, lead to a memory leak.

Signed-off-by: Lin Yi <teroincn@xxxxxxx>
Fixes: 7bd1d5edd016 ("Merge branch 'x86-urgent-for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip")
Cc: stable@xxxxxxxxxxxxxxx
---
 block/blk-sysfs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index 75b5281..539b7cb 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -971,6 +971,7 @@ int blk_register_queue(struct gendisk *disk)
 	ret = kobject_add(&q->kobj, kobject_get(&dev->kobj), "%s", "queue");
 	if (ret < 0) {
 		blk_trace_remove_sysfs(dev);
+		kobject_put(&dev->kobj);
 		goto unlock;
 	}
 
-- 
1.9.1