pipe(&(0x7f00000003c0)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000000)={<r1=>0xffffffffffffffff, <r2=>0xffffffffffffffff})
r3 = socket$inet_udp(0x2, 0x2, 0x0)
dup2(r3, r1)
splice(r2, 0x0, r0, 0x0, 0x7, 0x2)