steveloughran opened a new pull request, #16335:
URL: https://github.com/apache/iceberg/pull/16335

   Hardens variant metadata and value data parsing
   
   * long multiplication to avoid overflows
   * reject metadata, array data or object data which extends beyond the range 
of the variant data in the file.
   
   No checks on variant size (spark has this), or the depth limits of 
https://github.com/apache/parquet-java/pull/3562 . I think that should be 
discussed there as to whether its appropriate *at all*, before copying.
   
   No tests yet
   
   
   Fixes #16334
   


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