Corpus for ioctl$FIONREAD:

Coverage	Program
2344	perf_event_open-syz_init_net_socket$bt_sco-dup2-ioctl$FIONREAD
2296	perf_event_open-syz_init_net_socket$bt_sco-dup2-ioctl$FIONREAD
613	syz_open_dev$tty20-ioctl$FIONREAD
483	perf_event_open-syz_init_net_socket$bt_sco-dup2-ioctl$FIONREAD
453	syz_open_dev$tty20-ioctl$FIONREAD
443	perf_event_open-syz_init_net_socket$bt_sco-dup2-ioctl$FIONREAD
86	pipe-vmsplice-ioctl$FIONREAD
77	syz_open_dev$tty20-syz_open_dev$tty20-dup-ioctl$TIOCVHANGUP-ioctl$FIONREAD