OSS-Fuzz Integration

[ennamarie19]

My name is McKenna Dallmeyer and I would like to submit fpdf2 to OSS-Fuzz.

If you are not familiar with the project, OSS-Fuzz is Google's platform for continuous fuzzing of Open Source Software.

In order to get the most out of this program, it would be greatly beneficial to be able to merge-in my fuzz harness and build scripts into the upstream repository and contribute bug fixes if they come up. Is this something that you would support me putting the effort into?

Thank you!

[andersonhc]

It seems very interesting. You can submit your PR and we'll go from there.

[ennamarie19]

Wonderful! Thank you! Could you share an email address with me that I can include in my submission to OSS-Fuzz so that you are notified should any vulnerabilities be uncovered? I have to submit a project's maintainer's email with my project.yaml submission to OSS-Fuzz.
@andersonhc

[andersonhc]

Wonderful! Thank you! Could you share an email address with me that I can include in my submission to OSS-Fuzz so that you are notified should any vulnerabilities be uncovered? I have to submit a project's maintainer's email with my project.yaml submission to OSS-Fuzz. @andersonhc

you can start with [email protected]

[Lucas-C]

Hi.

My name is McKenna Dallmeyer and I would like to submit fpdf2 to OSS-Fuzz.

Welcome and good idea!
I tried to add CPython to OSS-Fuzz a few years ago (google/oss-fuzz#731 (comment)), but that attempt did not succeed at the time... 😅

In order to get the most out of this program, it would be greatly beneficial to be able to merge-in my fuzz harness

What exactly is your "fuzz harness"?

Another naive question: should we provide fuzz targets?

Thank you for this intent to contribute to fpdf2 @ennamarie19 🙂 👍

[ennamarie19]

Hi @Lucas-C !
Thanks for the response!
By fuzz harness, I mean I will need to host python scripts in this repository that fuzz various entry points into fpdf2.

While it is not required, it would be helpful if you could provide potential entry points that you think would benefit the most from fuzz testing.

Thank you for your help!

[Lucas-C]

By fuzz harness, I mean I will need to host python scripts in this repository that fuzz various entry points into fpdf2.

👍

While it is not required, it would be helpful if you could provide potential entry points that you think would benefit the most from fuzz testing.

fpdf2 is a PDF producer, so bascially input is code, and output is a PDF document.

We have various PDF-checkers in our CI pipeline that ensure that PDFs produced in our test suite are valid:
https://github.com/py-pdf/fpdf2/blob/master/.github/workflows/continuous-integration-workflow.yml#L45
Maybe they could be useful when fuzzing, to check that the output is valid, or not (meaning a probable bug)?

Regarding the input, I don't really know how what the best entry point / fuzzing target would be...
Should it be a single program?
Maybe one of our tutorial scripts, or one of our unit tests?

Do you have guidelines or documentation to help setting up Python fuzzing targets?

[gmischler]

Regarding the input, I don't really know how what the best entry point / fuzzing target would be...
Should it be a single program?
Maybe one of our tutorial scripts, or one of our unit tests?

The complete test suite?
If it's worth testing, it's worth fuzzing. 🤡

[ennamarie19]

> Regarding the input, I don't really know how what the best entry point / fuzzing target would be... > Should it be a single program? > Maybe one of our [tutorial scripts](https://github.com/py-pdf/fpdf2/tree/master/tutorial), or one of our unit tests? The complete test suite? If it's worth testing, it's worth fuzzing. 🤡

Awesome! Thanks so much

[Lucas-C]

Juste in order to clarify the status of this issue: is anyone working or planning to work on integrating fpdf2 with OSS-Fuzz? 🙂

[ennamarie19]

Hi Lucas, Still waiting on approval from OSS-Fuzz before I start. I’ll ping them again to see what’s taking so long. Thanks for the ping! On Aug 27, 2024, at 2:06 AM, Lucas Cimon ***@***.***> wrote: Juste in order to clarify the status of this issue: is anyone working or planning to work on integrating fpdf2 with OSS-Fuzz? 🙂 —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you were mentioned.Message ID: ***@***.***>