!5702 ext4: Validate inode pa before using preallocation blocks

Merge Pull Request from: @ci-robot 
 
PR sync from: Zhihao Cheng <chengzhihao1@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/VEGAMMXLY7MSYA4HTWN5N5XG54VPQCZP/ 
 
https://gitee.com/openeuler/kernel/issues/I97HJA 
 
Link:https://gitee.com/openeuler/kernel/pulls/5702

 

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