socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000080)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
pipe2(&(0x7f0000000180)={0xffffffffffffffff, <r1=>0xffffffffffffffff}, 0x800)
splice(r0, 0x0, r1, 0x0, 0x8, 0x0)