r0 = epoll_create1(0x0)
r1 = syz_open_dev$tty20(0xc, 0x4, 0x1)
epoll_ctl$EPOLL_CTL_ADD(r0, 0x1, r1, &(0x7f0000000180))
ioctl$TIOCVHANGUP(r1, 0x5437, 0x0)
epoll_ctl$EPOLL_CTL_MOD(r0, 0x3, r1, &(0x7f0000000000))