[PATCH -next 1/2] kobject: fix memory leak in kset_register() due to uninitialized kset->kobj.ktype

[Gaosheng Cui]

If a kset with uninitialized kset->kobj.ktype be registered,
kset_register() will return error, and the kset.kobj.name allocated
by kobject_set_name() will be leaked.

To mitigate this, we free the name in kset_register() when an error
is encountered due to uninitialized kset->kobj.ktype.

Fixes: 4d0fe8c52bb3 ("kobject: Add sanity check for kset->kobj.ktype in kset_register()")
Signed-off-by: Gaosheng Cui <cuigaosheng1@xxxxxxxxxx>
---
 lib/kobject.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/kobject.c b/lib/kobject.c
index 72fa20f405f1..ecca72622933 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -862,6 +862,8 @@ int kset_register(struct kset *k)
 		return -EINVAL;
 
 	if (!k->kobj.ktype) {
+		kfree_const(k->kobj.name);
+		k->kobj.name = NULL;
 		pr_err("must have a ktype to be initialized properly!\n");
 		return -EINVAL;
 	}
-- 
2.25.1