r0 = openat$loop_ctrl(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r1=>0xffffffffffffffff})
tee(r1, r0, 0x1000, 0x0)