socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000001000)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
fcntl$setstatus(r0, 0x4, 0xc00)
sendmsg(r0, &(0x7f00000002c0)={0x0, 0x0, 0x0}, 0x0)