ppkarwasz opened a new pull request, #725:
URL: https://github.com/apache/commons-compress/pull/725

   This PR fixes an issue in `CpioArchiveInputStream` where the checksum was 
computed using the wrong slice of the buffer. Previously, it always used bytes 
`0` through `len`, ignoring the specified `off` parameter. As a result, 
checksum verification could fail when `read()` was called with a non-zero 
offset.
   
   ### Changes
   
   * Corrected checksum calculation to use the actual range `off` through `off 
+ len`.
   * Added a regression test to ensure checksum verification works correctly 
with non-zero offsets.
   


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