Corpus for ioctl$FIONREAD:

Coverage	Program
2529	openat-ioctl$FIONREAD
1815	perf_event_open-pipe-write-epoll_create1-epoll_ctl$EPOLL_CTL_ADD-creat-ioctl$FIONREAD-splice
820	syz_open_dev$tty20-ioctl$FIONREAD
735	syz_open_dev$tty20-ioctl$FIONREAD
642	syz_open_dev$tty20-ioctl$FIONREAD
504	syz_open_dev$tty20-ioctl$FIONREAD-ioctl$AUTOFS_DEV_IOCTL_SETPIPEFD-perf_event_open-dup-ioctl$PERF_EVENT_IOC_MODIFY_ATTRIBUTES-ioctl$AUTOFS_DEV_IOCTL_PROTOVER-ioctl$KDGKBTYPE-fork-fork-kcmp
209	syz_open_dev$tty20-ioctl$FIONREAD