GH-48560: [C++][Parquet] When fuzzing, treat Table validation error as hard error#48863
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pitrou merged 1 commit intoapache:mainfrom Jan 19, 2026
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@github-actions crossbow submit fuzz |
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Revision: 1f1d34a Submitted crossbow builds: ursacomputing/crossbow @ actions-ccbec654ec
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wgtmac
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adamreeve
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Thanks for the reviews. I've merged this, let's "brace for impact" as the saying goes. |
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After merging your PR, Conbench analyzed the 3 benchmarking runs that have been run so far on merge-commit 34045db. There weren't enough matching historic benchmark results to make a call on whether there were regressions. The full Conbench report has more details. |
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Rationale for this change
Currently, when fuzzing a Parquet file, proper errors are ignored since the file is most of the time simply invalid: it's ok to get an error.
However, if reading a Parquet row group was successful, the Parquet reader should have ensured that the resulting Table is structurally sound: calling
Table::Validateshould succeed, and if it fails then it should report a bug.What changes are included in this PR?
Call
Table::Validateon a successful read from the Parquet fuzz target, and abort if validation fails.Table::ValidateFull, however, is allowed to fail, as for example a Parquet UTF8 column could contain invalid UTF8 bytes, and we don't detect that when decoding.Are these changes tested?
By existing tests and fuzz regression files.
Actual running this on OSS-Fuzz will tell us if this is really a good idea.
Are there any user-facing changes?
No.