r0 = epoll_create(0x3)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000280)={0xffffffffffffffff, <r1=>0xffffffffffffffff})
epoll_ctl$EPOLL_CTL_ADD(r0, 0x1, r1, &(0x7f0000000180)={0x10000002})