Corpus for ioctl$TCFLSH:

Coverage	Program
227	syz_open_dev$tty20-ioctl$VT_WAITACTIVE-ioctl$TCFLSH
226	syz_open_dev$tty20-ioctl$TCFLSH
167	syz_open_dev$tty20-ioctl$TCFLSH
152	openat$ptmx-ioctl$TIOCGPKT-ioctl$TIOCGPTPEER-ioctl$TCFLSH