r0 = openat$full(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000001000)={<r1=>0xffffffffffffffff})
sendfile(r1, r0, 0x0, 0xa0103)