Corpus for syz_open_dev$loop:

Coverage	Program
1089	perf_event_open-io_setup-openat$procfs-syz_open_dev$loop-ioctl$LOOP_CHANGE_FD
989	syz_open_dev$loop-ioctl$LOOP_GET_STATUS64
966	syz_open_dev$loop
875	syz_open_dev$loop-ioctl$LOOP_CHANGE_FD