!4588 fs,hugetlb: fix NULL pointer dereference in hugetlbs_fill_super

Merge Pull Request from: @ci-robot 
 
PR sync from: Liu Shixin <liushixin2@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/BOZNK23Q4AZ3GCNZPI7RPCU3GNWPBLBV/ 
 
https://gitee.com/src-openeuler/kernel/issues/I8ZGZK 
 
Link:https://gitee.com/openeuler/kernel/pulls/4588

 

Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: zhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>