io_setup(0xcdb, &(0x7f00000001c0)=<r0=>0x0)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000200)={0xffffffffffffffff, <r1=>0xffffffffffffffff})
io_submit(r0, 0x1, &(0x7f0000000600)=[&(0x7f0000000240)={0x0, 0x0, 0x0, 0x5, 0x0, r1, 0x0}])