> On Aug 16, 2022, at 21:05, Miaohe Lin <linmiaohe@xxxxxxxxxx> wrote: > > If sysfs_create_group() fails with hstate_attr_group, hstate_kobjs[hi] > will be set to NULL. Then it will be passed to sysfs_create_group() if > h->demote_order != 0 thus triggering WARN_ON(!kobj) check. Fix this by > making sure hstate_kobjs[hi] != NULL when calling sysfs_create_group. > > Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx> It’s better to add a Fixes tag here. Reviewed-by: Muchun Song <songmuchun@xxxxxxxxxxxxx> Thanks.