[PATCH 5.4 051/134] efi/efivars: Add missing kobject_put() in sysfs entry creation error path

From: Greg Kroah-Hartman
Date: Tue Jun 16 2020 - 11:39:33 EST


From: Ard Biesheuvel <ardb@xxxxxxxxxx>

commit d8bd8c6e2cfab8b78b537715255be8d7557791c0 upstream.

The documentation provided by kobject_init_and_add() clearly spells out
the need to call kobject_put() on the kobject if an error is returned.
Add this missing call to the error path.

Cc: <stable@xxxxxxxxxxxxxxx>
Reported-by: ää <teroincn@xxxxxxxxx>
Signed-off-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/firmware/efi/efivars.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/firmware/efi/efivars.c
+++ b/drivers/firmware/efi/efivars.c
@@ -522,8 +522,10 @@ efivar_create_sysfs_entry(struct efivar_
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)) {