!4677 f2fs: fix to avoid dirent corruption

Merge Pull Request from: @ci-robot 
 
PR sync from: Zizhi Wo <wozizhi@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/55MF7SAY4LWESUX54WU76H7M7LZMH6WE/ 
 
https://gitee.com/src-openeuler/kernel/issues/I932VP 
 
Link:https://gitee.com/openeuler/kernel/pulls/4677

 

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