socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000001000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
sendmsg(r0, &(0x7f0000000480)={0x0, 0x0, &(0x7f00000002c0)=[{&(0x7f0000000000)="1d", 0x1}], 0x1}, 0x40011)
recvmmsg(r1, &(0x7f0000000e40)=[{{0x0, 0x0, 0x0}}], 0x1, 0x2, 0x0)