anupamaggarwal opened a new pull request, #24307:
URL: https://github.com/apache/flink/pull/24307
## What is the purpose of the change
This pull request adds additional checks to improve robustness of
FileUtils.expandDirectory() method.
## Brief change log
- Adds additional checks in expandDirectory() method to ensure any paths
don't refer to locations outside target directory. Check is recursive and
ensures the expanded path is fully contained inside the target directory.
## Verifying this change
This change added tests and can be verified as follows:
- Added unit test to account for relative paths within target directory
(these accesses should be allowed)
- Added unit test for access outside target directory (these should fail
with I/O Exception)
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): no
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: no
- The serializers: no
- The runtime per-record code paths (performance sensitive): no
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no
- The S3 file system connector: no
## Documentation
- Does this pull request introduce a new feature? no
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