Description wangpingping 2023-05-31 14:25:47 UTC

[缺陷描述]：
xfstests:ext4-nfsv3-2 nfs文件系统，generic/193测试用例执行失败，test out the clear of suid/sgid for truncate不符合预期；


失败日志如下：
#./check -nfs generic/193
FSTYP         -- nfs
PLATFORM      -- Linux/aarch64 VM20200706-20 5.10.134-947.git.9eb9e601b.al8.aarch64 #1 SMP Tue May 30 13:56:15 UTC 2023
MKFS_OPTIONS  -- localhost:/export//fs/vdb2
MOUNT_OPTIONS -- -o vers=3 localhost:/export//fs/vdb2 /nfs/vdb2

generic/193       - output mismatch (see /tmp/tone/run/xfstests/results//generic/193.out.bad)
    --- tests/generic/193.out   2023-05-31 01:04:46.584151545 +0800
    +++ /tmp/tone/run/xfstests/results//generic/193.out.bad     2023-05-31 14:21:20.693181217 +0800
    @@ -32,10 +32,10 @@
     check that suid/sgid bits are cleared after successful chown...
     with no exec perm
     before: -rwSr-Sr--
    -after:  -rw-r-Sr--
    +after:  -rw-r--r--
     with user exec perm
     before: -rwsr-Sr--
    ...
    (Run 'diff -u /tmp/tone/run/xfstests/tests/generic/193.out /tmp/tone/run/xfstests/results//generic/193.out.bad'  to see the entire diff)
Ran: generic/193
Failures: generic/193
Failed 1 of 1 tests

# diff -u /tmp/tone/run/xfstests/tests/generic/193.out /tmp/tone/run/xfstests/results//generic/193.out.bad
--- /tmp/tone/run/xfstests/tests/generic/193.out        2023-05-31 01:04:46.584151545 +0800
+++ /tmp/tone/run/xfstests/results//generic/193.out.bad 2023-05-31 14:21:20.693181217 +0800
@@ -32,10 +32,10 @@
 check that suid/sgid bits are cleared after successful chown...
 with no exec perm
 before: -rwSr-Sr--
-after:  -rw-r-Sr--
+after:  -rw-r--r--
 with user exec perm
 before: -rwsr-Sr--
-after:  -rwxr-Sr--
+after:  -rwxr--r--
 with group exec perm
 before: -rwSr-sr--
 after:  -rw-r-xr--


[复现概率]：
必现

[复现环境]：
内核：
# uname -r
5.10.134-945.git.9eb9e601b492.al8.x86_64

# ]# cat /etc/os-release
NAME="Alibaba Cloud Linux"
VERSION="3 (Soaring Falcon)"
ID="alinux"
ID_LIKE="rhel fedora centos"
VERSION_ID="3"
PLATFORM_ID="platform:al8"
PRETTY_NAME="Alibaba Cloud Linux 3 (Soaring Falcon)"
ANSI_COLOR="0;31"
HOME_URL="https://www.aliyun.com/"

CPU信息：
# lscpu
Architecture:        x86_64
CPU op-mode(s):      32-bit, 64-bit
Byte Order:          Little Endian
CPU(s):              8
On-line CPU(s) list: 0-7
Thread(s) per core:  2
Core(s) per socket:  4
Socket(s):           1
NUMA node(s):        1
Vendor ID:           GenuineIntel
BIOS Vendor ID:      Alibaba Cloud
CPU family:          6
Model:               85
Model name:          Intel(R) Xeon(R) Platinum 8269CY CPU @ 2.50GHz
BIOS Model name:     pc-i440fx-2.1
Stepping:            7
CPU MHz:             2500.016
BogoMIPS:            5000.03
Hypervisor vendor:   KVM
Virtualization type: full
L1d cache:           32K
L1i cache:           32K
L2 cache:            1024K
L3 cache:            36608K
NUMA node0 CPU(s):   0-7
Flags:               fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl cpuid tsc_known_freq pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch invpcid_single pti ibrs ibpb stibp fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx avx512f avx512dq rdseed adx smap avx512cd avx512bw avx512vl xsaveopt xsavec xgetbv1

内存信息：
# free -h
              total        used        free      shared  buff/cache   available
Mem:           31Gi       893Mi        29Gi       2.0Mi       751Mi        29Gi
Swap:            0B          0B          0B


[复现步骤]：
1.下载并编译测试套
git clone --branch kernel-5.10 https://code.alibaba-inc.com/AKTF/xfstests-dev.git
cd xfstests
export CFLAGS="-fcommon"
make configure
./configure
make && make install

2.初始化测试盘
dmsetup remove_all
wipefs -a --force /dev/vdb1
wipefs -a --force /dev/vdb2
mkfs -t ext4 -q -F /dev/vdb1
mkfs -t ext4 -q -F /dev/vdb2
mkdir -p /fs/vdb1
mount -t ext4 /dev/vdb1 /fs/vdb1
mkdir -p /fs/vdb2
mount -t ext4 /dev/vdb2 /fs/vdb2
yum install -y nfs-utils nfs4-acl-tools
mkdir -p /export
mount -t tmpfs nfsv4_root_export /export
mkdir -p /export//fs/vdb1
mount --bind /fs/vdb1 /export//fs/vdb1
echo '/export *(fsid=0,rw,no_subtree_check,no_root_squash)' > /etc/exports
echo '/export//fs/vdb1 *(rw,no_subtree_check,no_root_squash)' >> /etc/exports
mkdir -p /export//fs/vdb2
mount --bind /fs/vdb2 /export//fs/vdb2
echo '/export//fs/vdb2 *(rw,no_subtree_check,no_root_squash)' >> /etc/exports
systemctl restart rpcbind
systemctl restart nfs-server
exportfs -r
mkdir -p /nfs/vdb1
mount -t nfs -o vers=3 localhost:/export//fs/vdb1 /nfs/vdb1
mkdir -p /nfs/vdb2
mount -t nfs -o vers=3 localhost:/export//fs/vdb2 /nfs/vdb2
umount -f -l /nfs/vdb1 /nfs/vdb2 /fs/vdb1 /fs/vdb2
export TEST_DIR=/nfs/vdb1
export TEST_DEV=/dev/vdb1
export FSTYP=nfs
export nfsvers=3
export SCRATCH_MNT=/fs/scratch
mkdir /nfs/vdb1 -p
mkdir /fs/scratch -p
export SCRATCH_DEV=/dev/vdb2
export TEST_DIR=/nfs/vdb1
export SCRATCH_MNT=/nfs/vdb2
export TEST_DEV=localhost:/export//fs/vdb1
export SCRATCH_DEV=localhost:/export//fs/vdb2
export 'TEST_FS_MOUNT_OPTS=-o vers=3'
export 'MOUNT_OPTIONS=-o vers=3'

3.执行测试用例
./check -nfs generic/193


[预期结果]：
用例执行成功

[实际结果]：
用例执行失败