socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000040)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
write$nbd(r1, &(0x7f0000000400), 0x10)
write$nbd(r1, &(0x7f0000000080), 0x10)
recvmsg(r0, &(0x7f00000003c0)={0x0, 0x0, 0x0}, 0x2142)