socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000680)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
getsockopt$sock_buf(r0, 0x1, 0x2f, &(0x7f0000000080)=""/60, &(0x7f00000000c0)=0x3c)