[PATCH] efi: Fix reference count leak in efivar_create_sysfs_entry.

[wu000273]

From: Qiushi Wu <wu000...@umn.edu>

kobject_init_and_add() should be handled when it return an error,
because kobject_init_and_add() takes reference even when it fails.
If this function returns an error, kobject_put() must be called to
properly clean up the memory associated with the object. Previous
commit "b8eb718348b8" fixed a similar problem.

Signed-off-by: Qiushi Wu <wu000...@umn.edu>
---
 drivers/firmware/efi/efivars.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/efi/efivars.c b/drivers/firmware/efi/efivars.c
index 78ad1ba8c987..26528a46d99e 100644
--- a/drivers/firmware/efi/efivars.c
+++ b/drivers/firmware/efi/efivars.c
@@ -522,8 +522,10 @@ efivar_create_sysfs_entry(struct efivar_entry *new_var)
        ret = kobject_init_and_add(&new_var->kobj, &efivar_ktype,
                                   NULL, "%s", short_name);
        kfree(short_name);
-       if (ret)
+       if (ret) {
+               kobject_put(&new_var->kobj);
                return ret;
+       }
 
        kobject_uevent(&new_var->kobj, KOBJ_ADD);
        if (efivar_entry_add(new_var, &efivar_sysfs_list)) {
-- 
2.17.1