Corpus for read$snapshot:

Coverage	Program
3337	openat-mknod$loop-perf_event_open-ioctl$AUTOFS_DEV_IOCTL_REQUESTER-ioctl$BTRFS_IOC_QUOTA_RESCAN-ioctl$BLKTRACESETUP-openat$sysfs-ioctl$BLKTRACETEARDOWN-read$snapshot-ioctl$FS_IOC_FSSETXATTR-syz_open_procfs-pread64-ioctl$AUTOFS_DEV_IOCTL_TIMEOUT-sendmsg$NL80211_CMD_GET_KEY
476	perf_event_open-pipe-read$snapshot-close_range
131	signalfd-read$snapshot