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Avoid creation of target type name when it's longer then DM_MAX_TYPE_NAME (noticed by static analyzer where the sp.target_type might be missing '\0' at the end.) Before patch: $> dmsetup create long 0 1000 looooooooooooooooooooooooooong ^D device-mapper: reload ioctl failed: Invalid argument After patch: $> dmsetup create xxx 0 1000 looooooooooooooooooooooooooong Target type name looooooooooooooooooooooooooong is too long. Command failed