Not work on MagicBox T17 running YunOS6.1(aka Android5.1 LMY47V.20200724)

[startpenghubingzhou]

shell@MagicBox_T17:/ $ cd /data/local/tmp
cd /data/local/tmp
shell@MagicBox_T17:/data/local/tmp $ ./run_root_shell
./run_root_shell


Device detected: MagicBox_T17 (LMY47V.20200724 test-keys)

Try to find address in memory...
Attempt msm_cameraconfig exploit...
Detected kernel physical address at 0x00108000 from iomem

Attempt fb_mem exploit...
Detected kernel physical address at 0x00108000 from iomem
You need to manage to get remap_pfn_range address.

Try copying kernel memory... It will take a long time.
Attempt pingpong exploit...
Attempt futex exploit...
failed to exploit...
Attempt get_user exploit...
connect(): failed
Attempt get_user exploit...
error in setsockopt().
error in setsockopt().
Failed to get prepare_kernel_cred address.
Failed to get commit_creds address.
Failed to get ptmx_fops address.
Failed to get prepare_kernel_cred address.
Failed to get commit_creds address.
Failed to get ptmx_fops address.
MagicBox_T17 (LMY47V.20200724 test-keys) is not supported.
Failed to setup variables.
MagicBox_T17 (LMY47V.20200724 test-keys) is not supported.
Failed to setup variables.
1|shell@MagicBox_T17:/data/local/tmp $

This is the log and I don't know the reason. Maybe YunOS has some changes?
BTW, I' m running the adb 1.0.32 in Windows Vista lol.