nfs mount之后权限不对

复现步骤
```
[root@nfs_test2 ~]# mkfs.ext4 -F /dev/sdb
mke2fs 1.46.5 (30-Dec-2021)
/dev/sdb contains a ext4 file system
        last mounted on /mnt/sdb on Thu Feb 13 14:07:28 2025
Discarding device blocks: done
Creating filesystem with 5242880 4k blocks and 1310720 inodes
Filesystem UUID: c842c74d-f5b7-4132-8d92-86c8c56f519a
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
        4096000

Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

[root@nfs_test2 ~]# mount /dev/sdb /mnt/sdb
[root@nfs_test2 ~]# mkdir /mnt/sdb/test_dir1
[root@nfs_test2 ~]# mkdir /mnt/sdb/test_dir2
[root@nfs_test2 ~]# echo "/mnt/sdb *(rw,no_root_squash)" > /etc/exports
tsoot@nfs_test2 ~]# echo "/mnt/sdb/test_dir2 *(ro,no_root_squash)" >> /etc/export
[root@nfs_test2 ~]# systemctl restart nfs-server
[root@nfs_test2 ~]#
1root@nfs_test2 ~]# mount -t nfs -o rw 127.0.0.1:/mnt/sdb/test_dir1 /mnt/test_mp1
[  121.757405][ T2717] NFS: SECINFO: security flavor 390003 is not supported
[  121.780880][ T2717] NFS: SECINFO: security flavor 390004 is not supported
[  121.796284][ T2717] NFS: SECINFO: security flavor 390005 is not supported
[root@nfs_test2 ~]# mount | grep nfs
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw,relatime)
nfsd on /proc/fs/nfsd type nfsd (rw,relatime)
127.0.0.1:/mnt/sdb/test_dir1 on /mnt/test_mp1 type nfs4 (rw,relatime,vers=4.2,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=127.0.0.1)
[root@nfs_test2 ~]#
[root@nfs_test2 ~]#
2root@nfs_test2 ~]# mount -t nfs -o ro 127.0.0.1:/mnt/sdb/test_dir2 /mnt/test_mp2
[root@nfs_test2 ~]# mount | grep nfs
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw,relatime)
nfsd on /proc/fs/nfsd type nfsd (rw,relatime)
127.0.0.1:/mnt/sdb/test_dir1 on /mnt/test_mp1 type nfs4 (ro,relatime,vers=4.2,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=127.0.0.1)
127.0.0.1:/mnt/sdb/test_dir2 on /mnt/test_mp2 type nfs4 (ro,relatime,vers=4.2,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=127.0.0.1)
[root@nfs_test2 ~]#
```

实际情况
```
[root@nfs_test2 ~]# mkfs.ext4 -F /dev/sdb
mke2fs 1.46.5 (30-Dec-2021)
/dev/sdb contains a ext4 file system
        last mounted on /mnt/sdb on Thu Feb 13 14:07:28 2025
Discarding device blocks: done
Creating filesystem with 5242880 4k blocks and 1310720 inodes
Filesystem UUID: c842c74d-f5b7-4132-8d92-86c8c56f519a
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
        4096000

Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

[root@nfs_test2 ~]# mount /dev/sdb /mnt/sdb
[root@nfs_test2 ~]# mkdir /mnt/sdb/test_dir1
[root@nfs_test2 ~]# mkdir /mnt/sdb/test_dir2
[root@nfs_test2 ~]# echo "/mnt/sdb *(rw,no_root_squash)" > /etc/exports
tsoot@nfs_test2 ~]# echo "/mnt/sdb/test_dir2 *(ro,no_root_squash)" >> /etc/export
[root@nfs_test2 ~]# systemctl restart nfs-server
[root@nfs_test2 ~]#
1root@nfs_test2 ~]# mount -t nfs -o rw 127.0.0.1:/mnt/sdb/test_dir1 /mnt/test_mp1
[ 121.757405][ T2717] NFS: SECINFO: security flavor 390003 is not supported
[ 121.780880][ T2717] NFS: SECINFO: security flavor 390004 is not supported
[ 121.796284][ T2717] NFS: SECINFO: security flavor 390005 is not supported
[root@nfs_test2 ~]# mount | grep nfs
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw,relatime)
nfsd on /proc/fs/nfsd type nfsd (rw,relatime)
127.0.0.1:/mnt/sdb/test_dir1 on /mnt/test_mp1 type nfs4 (rw,relatime,vers=4.2,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=127.0.0.1)
[root@nfs_test2 ~]#
[root@nfs_test2 ~]#
2root@nfs_test2 ~]# mount -t nfs -o ro 127.0.0.1:/mnt/sdb/test_dir2 /mnt/test_mp2
[root@nfs_test2 ~]# mount | grep nfs
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw,relatime)
nfsd on /proc/fs/nfsd type nfsd (rw,relatime)
127.0.0.1:/mnt/sdb/test_dir1 on /mnt/test_mp1 type nfs4 (ro,relatime,vers=4.2,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=127.0.0.1)
127.0.0.1:/mnt/sdb/test_dir2 on /mnt/test_mp2 type nfs4 (ro,relatime,vers=4.2,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=127.0.0.1)
[root@nfs_test2 ~]#
```

预期情况
```
[root@nfs_test2 ~]# mkfs.ext4 -F /dev/sdb
mke2fs 1.46.5 (30-Dec-2021)
/dev/sdb contains a ext4 file system
        last mounted on Thu Feb 13 15:23:28 2025
Discarding device blocks: done
Creating filesystem with 5242880 4k blocks and 1310720 inodes
Filesystem UUID: f84e93a0-7673-4f39-af20-93fecc11260b
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
        4096000

Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

[root@nfs_test2 ~]# mount /dev/sdb /mnt/sdb
[root@nfs_test2 ~]# mkdir /mnt/sdb/test_dir1
[root@nfs_test2 ~]# mkdir /mnt/sdb/test_dir2
[root@nfs_test2 ~]# echo "/mnt/sdb *(rw,no_root_squash)" > /etc/exports
tsoot@nfs_test2 ~]# echo "/mnt/sdb/test_dir2 *(ro,no_root_squash)" >> /etc/export
[root@nfs_test2 ~]# systemctl restart nfs-server
1root@nfs_test2 ~]# mount -t nfs -o rw 127.0.0.1:/mnt/sdb/test_dir1 /mnt/test_mp1
[ 108.819585][ T2206] NFS: SECINFO: security flavor 390003 is not supported
[ 108.847028][ T2206] NFS: SECINFO: security flavor 390004 is not supported
[ 108.864075][ T2206] NFS: SECINFO: security flavor 390005 is not supported
[root@nfs_test2 ~]# mount | grep nfs
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw,relatime)
nfsd on /proc/fs/nfsd type nfsd (rw,relatime)
127.0.0.1:/mnt/sdb/test_dir1 on /mnt/test_mp1 type nfs4 (rw,relatime,vers=4.2,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=127.0.0.1)
2root@nfs_test2 ~]# mount -t nfs -o ro 127.0.0.1:/mnt/sdb/test_dir2 /mnt/test_mp2
[root@nfs_test2 ~]# mount | grep nfs
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw,relatime)
nfsd on /proc/fs/nfsd type nfsd (rw,relatime)
127.0.0.1:/mnt/sdb/test_dir1 on /mnt/test_mp1 type nfs4 (rw,relatime,vers=4.2,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=127.0.0.1)
127.0.0.1:/mnt/sdb/test_dir2 on /mnt/test_mp2 type nfs4 (ro,relatime,vers=4.2,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=127.0.0.1)
[root@nfs_test2 ~]#
```
**二、缺陷分析结构反馈**
影响性分析说明：

缺陷严重等级:(Critical/High/Moderate/Low)

缺陷根因说明:

受影响版本排查(受影响/不受影响):
openEuler-20.03-LTS-SP4
openEuler-22.03-LTS-SP3
openEuler-22.03-LTS-SP4
openEuler-24.03-LTS
openEuler-24.03-LTS-SP1

修复是否涉及abi变化(是/否):
openEuler-20.03-LTS-SP4
openEuler-22.03-LTS-SP3
openEuler-22.03-LTS-SP4
openEuler-24.03-LTS
openEuler-24.03-LTS-SP1

GVP openEuler/kernel

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GVPopenEuler/kernel

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