socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000000)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
getsockopt$sock_buf(r0, 0x1, 0x1c, &(0x7f00000000c0)=""/1, &(0x7f0000000100)=0x1)