r0 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./cgroup.net/cgroup.procs\x00', 0x0, 0x0)
r1 = socket$nl_sock_diag(0x10, 0x3, 0x4)
sendfile(r1, r0, &(0x7f0000000240)=0x2, 0xff)