sarutak opened a new pull request, #53422: URL: https://github.com/apache/spark/pull/53422
### What changes were proposed in this pull request? This PR backports #53366 to `branch-3.5`. This PR aims to check offset and length on copying in `UTF8String#reverse`. For details, see https://lists.apache.org/thread/d9pvkh3jbsq8lc33v75kmwq5wg57422h (Only PMC members can read with login). To avoid performance regression, this PR choose to check offset and length rather than validate the input UTF-8 string. ### Why are the changes needed? For safety. ### Does this PR introduce _any_ user-facing change? Yes, but doesn't break compatibility. ### How was this patch tested? Example queries mentioned in [this thread](https://lists.apache.org/thread/d9pvkh3jbsq8lc33v75kmwq5wg57422h) works even though the results are broken. All the operation defined in `UTF8String` are expected to work correctly with valid UTF-8 strings so the broken results with invalid UTF-8 strings should be reasonable. ### Was this patch authored or co-authored using generative AI tooling? No. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
