socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000001000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
sendmsg(r0, &(0x7f0000000480)={0x0, 0x0, &(0x7f0000000100)=[{&(0x7f0000000040)='=1', 0x2}], 0x1}, 0x40011)
recvmsg(r1, &(0x7f0000000200)={0x0, 0x0, 0x0}, 0x12101)