!5514 CVE-2021-47110

Merge Pull Request from: @LiuYongQiang0816 
 
fix CVE-2021-47110 

https://gitee.com/src-openeuler/kernel/issues/I990A4 
 
Link:https://gitee.com/openeuler/kernel/pulls/5514

 

Reviewed-by: Wei Li <liwei391@huawei.com>
Reviewed-by: Kevin Zhu <zhukeqian1@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>