!10183 v3 ima: Fix use-after-free on a dentry's dname.name

Merge Pull Request from: @ci-robot 
 
PR sync from: "GONG, Ruiqi" <gongruiqi1@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/T67E6QZRQAD6UHJXRR2BJYRASV5COQZ5/ 
 
https://gitee.com/src-openeuler/kernel/issues/IAD0O1 
 
Link:https://gitee.com/openeuler/kernel/pulls/10183

 

Reviewed-by: Liu YongQiang <liuyongqiang13@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>