After I opened the selinux, add a permissions:
Allow untrusted_app untrusted_app: udp_socket ioctl;

But after added or hint:
1568965831.402: type=1400 audit (4) : avc: denied {ioctl} for pid=2284 comm="KernelThread - 2" path="socket: [31619]" dev="sockfs ino ioctlcmd=8927 scontext=u=31619: r: untrusted_app: s0: c512, c768 tcontext=u: r: untrusted_app: s0: c512, c768 tclass=udp_socket permissive=0

Has been tried in untrusted_app. Te add mlstrustedsubject file, but still won't do, heard that the third party app, is there a way to solve?

Thank you very much!