socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000001000)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
getsockopt$sock_buf(r0, 0x1, 0x3b, &(0x7f0000000100)=""/15, &(0x7f0000000140)=0xf)