Prescientfuzz testing #1982

DanBlackwell · 2024-05-09T14:39:26Z

Hi, I have a new fuzzer based on LibAFL that I would like to integrate. I'd like to be able to run an experiment to compare it with the other fuzzers, but the documented approach (adding to https://github.com/google/fuzzbench/blob/master/service/experiment-requests.yaml) doesn't seem to be used lately - is there some automatic experiment that runs periodically?

google-cla · 2024-05-09T14:39:30Z

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DonggeLiu · 2024-05-10T03:13:18Z

Hi, I have a new fuzzer based on LibAFL that I would like to integrate. I'd like to be able to run an experiment to compare it with the other fuzzers, but the documented approach (adding to https://github.com/google/fuzzbench/blob/master/service/experiment-requests.yaml) doesn't seem to be used lately - is there some automatic experiment that runs periodically?

Thanks for submitting a PR, @DanBlackwell! This makes our work a lot easier : )
Here is a guide on how to enable PR experiments: #1967 (comment), hope that helps!

Once it is ready, we can use the /gcbrun commands to run experiments and show results on this PR directly, without having to wait for another day before experiment-requests.yaml triggers a new experiment.

DanBlackwell · 2024-05-10T08:24:27Z

/gcbrun run_experiment.py -a --experiment-config /opt/fuzzbench/service/experiment-config.yaml --experiment-name 2024-05-10_prescientfuzz_init --fuzzers libafl aflplusplus prescientfuzz honggfuzz libfuzzer

DonggeLiu · 2024-05-10T10:54:25Z

/gcbrun run_experiment.py -a --experiment-config /opt/fuzzbench/service/experiment-config.yaml --experiment-name 2024-05-10-prescientfuzz_init --fuzzers prescientfuzz

DanBlackwell · 2024-05-13T10:32:57Z

@DonggeLiu Has this failed to build? I can't see anything in that CI log

DonggeLiu · 2024-05-14T01:08:14Z

Experiment 2024-05-14-prescientfuzz-init data and results will be available later at:
The experiment data.
The experiment report.
The experiment report(experimental).

DonggeLiu · 2024-05-14T01:09:08Z

@DonggeLiu Has this failed to build? I can't see anything in that CI log

Yes, I failed to notice that the experiment name does not match this pattern: "^[a-z0-9-]{0,30}$".
Let me restart one named 2024-05-14-prescientfuzz-init now.
The data & report will be available in the links above later.

DonggeLiu · 2024-05-14T01:10:34Z

/gcbrun run_experiment.py -a --experiment-config /opt/fuzzbench/service/experiment-config.yaml --experiment-name 2024-05-14-prescientfuzz-init --fuzzers prescientfuzz

DanBlackwell · 2024-05-15T19:55:19Z

Ok, still some dying from memory starvation. I think I have it fixed now; any chance you could rerun that exact setup for me @DonggeLiu ?

Oh, Is there any caching in the docker setup? I've only updated the fuzzer source repo, so if docker caches the build images it probably won't fetch the updated version.

DonggeLiu · 2024-05-16T01:23:22Z

Oh, Is there any caching in the docker setup? I've only updated the fuzzer source repo, so if docker caches the build images it probably won't fetch the updated version.

I vaguely recall that this has caused problems before.
Could you please modify the dockerfile just in case? Thanks!

I am happy to re-run the experiment when you are ready, please feel free to ping me.

DanBlackwell · 2024-05-16T08:09:21Z

Ok, have manually specified the commit number which should trash the cache. All ready to go!

DonggeLiu · 2024-05-16T12:15:28Z

/gcbrun run_experiment.py -a --experiment-config /opt/fuzzbench/service/experiment-config.yaml --experiment-name 2024-05-16-prescientfuzz-init --fuzzers prescientfuzz

DonggeLiu · 2024-05-16T12:20:25Z

Experiment 2024-05-16-prescientfuzz-init data and results will be available later at:
The experiment data.
The experiment report.
The experiment report(experimental).

DanBlackwell · 2024-05-16T13:51:40Z

I forgot that it needs git fetch before checking out sorry... Any chance you can restart that @DonggeLiu ?

DonggeLiu · 2024-05-17T00:08:55Z

/gcbrun run_experiment.py -a --experiment-config /opt/fuzzbench/service/experiment-config.yaml --experiment-name 2024-05-17-prescientfuzz-init --fuzzers prescientfuzz

DonggeLiu · 2024-05-17T00:14:49Z

Experiment 2024-05-17-prescientfuzz-init data and results will be available later at:
The experiment data.
The experiment report.
The experiment report(experimental).

DanBlackwell · 2024-05-17T09:42:47Z

Hi @DonggeLiu ; any chance you can restart it? Just patched another bug sorry.

DonggeLiu · 2024-05-17T10:50:55Z

Hi @DonggeLiu ; any chance you can restart it? Just patched another bug sorry.

Sure! I've terminated all instances of the previous experiment and approved the CIs.
Before we start another experiment, would you mind checking if there is any CI error?
I will start the experiment if they behave as expected : )

DanBlackwell · 2024-05-17T11:26:21Z

The CI looks ok to me, and I ran one of the previously failing benchmarks through the debug-builder earlier. I'm hoping this run should have everything working finally; I appreciate your patience! (I'm trying to build a global CFG without the LTO pass - which has been tricky for me)

DonggeLiu · 2024-05-17T11:29:36Z

/gcbrun run_experiment.py -a --experiment-config /opt/fuzzbench/service/experiment-config.yaml --experiment-name 2024-05-17-prescientfuzz-ini --fuzzers prescientfuzz

DonggeLiu · 2024-05-17T11:42:03Z

The experiment CI says failed, but the experiment instance and the data directory has been created, so I reckon we are safe.

Experiment 2024-05-17-prescientfuzz-ini data and results will be available later at:
The experiment data.
The experiment report.
The experiment report(experimental).

DanBlackwell · 2024-05-20T11:18:21Z

Hi @DonggeLiu , finally I have everything building and running; am I allowed to run say 5 instances to test different parameter setups? I'm thinking to add each setup as a different 'fuzzer' (in ./fuzzers) and then they can all run in one experiment. Do let me know if there's a better approach.

DanBlackwell · 2024-05-20T11:19:26Z

Also, I wanted to generate that report just for PrescientFuzz vs LibAFL (as the graphs are hard to read with so many fuzzers); I tried doing the following but got an error:

(.venv) ➜  fuzzbench git:(prescientfuzz_initial_integration) ✗ PYTHONPATH=. python3 analysis/generate_report.py PrescientFuzz --report-dir PrescientFuzzReport --fuzzers prescientfuzz libafl --from-cached-data
INFO:root:Reading experiment data from PrescientFuzzReport/data.csv.gz.
/home/dan/Documents/fuzzbench/analysis/generate_report.py:139: DtypeWarning: Columns (1) have mixed types. Specify dtype option on import or set low_memory=False.
  experiment_df = pd.read_csv(data_path)
INFO:root:Done reading data from PrescientFuzzReport/data.csv.gz.
WARNING:root:Filtered out invalid benchmarks: set().
INFO:root:Rendering HTML report.
/home/dan/Documents/fuzzbench/analysis/plotting.py:485: OrangeDeprecationWarning: compute_CD is deprecated and will be removed in Orange 3.34.
  critical_difference = Orange.evaluation.compute_CD(
/home/dan/Documents/fuzzbench/analysis/plotting.py:488: OrangeDeprecationWarning: graph_ranks is deprecated and will be removed in Orange 3.34.
  Orange.evaluation.graph_ranks(average_ranks.values, average_ranks.index,
/home/dan/Documents/fuzzbench/.venv/lib/python3.10/site-packages/jinja2/runtime.py:298: FutureWarning: this method is deprecated in favour of `Styler.to_html()`
  return __obj(*args, **kwargs)
Traceback (most recent call last):
  File "/home/dan/Documents/fuzzbench/analysis/generate_report.py", line 293, in <module>
    sys.exit(main())
  File "/home/dan/Documents/fuzzbench/analysis/generate_report.py", line 277, in main
    generate_report(experiment_names=args.experiments,
  File "/home/dan/Documents/fuzzbench/analysis/generate_report.py", line 261, in generate_report
    detailed_report = rendering.render_report(experiment_ctx, template,
  File "/home/dan/Documents/fuzzbench/analysis/rendering.py", line 46, in render_report
    return template.render(experiment=experiment_results,
  File "/home/dan/Documents/fuzzbench/.venv/lib/python3.10/site-packages/jinja2/environment.py", line 1301, in render
    self.environment.handle_exception()
  File "/home/dan/Documents/fuzzbench/.venv/lib/python3.10/site-packages/jinja2/environment.py", line 936, in handle_exception
    raise rewrite_traceback_stack(source=source)
  File "/home/dan/Documents/fuzzbench/analysis/report_templates/default.html", line 143, in top-level template code
    {{ experiment.relative_code_summary_table.render() }}
  File "/home/dan/Documents/fuzzbench/.venv/lib/python3.10/site-packages/pandas/io/formats/style.py", line 344, in render
    return self._render_html(sparse_index, sparse_columns, **kwargs)
  File "/home/dan/Documents/fuzzbench/.venv/lib/python3.10/site-packages/pandas/io/formats/style_render.py", line 162, in _render_html
    self._compute()
  File "/home/dan/Documents/fuzzbench/.venv/lib/python3.10/site-packages/pandas/io/formats/style_render.py", line 205, in _compute
    r = func(self)(*args, **kwargs)
  File "/home/dan/Documents/fuzzbench/.venv/lib/python3.10/site-packages/pandas/io/formats/style.py", line 1444, in _apply
    result = data.T.apply(func, axis=0, **kwargs).T  # see GH 42005
  File "/home/dan/Documents/fuzzbench/.venv/lib/python3.10/site-packages/pandas/core/frame.py", line 8848, in apply
    return op.apply().__finalize__(self, method="apply")
  File "/home/dan/Documents/fuzzbench/.venv/lib/python3.10/site-packages/pandas/core/apply.py", line 733, in apply
    return self.apply_standard()
  File "/home/dan/Documents/fuzzbench/.venv/lib/python3.10/site-packages/pandas/core/apply.py", line 857, in apply_standard
    results, res_index = self.apply_series_generator()
  File "/home/dan/Documents/fuzzbench/.venv/lib/python3.10/site-packages/pandas/core/apply.py", line 873, in apply_series_generator
    results[i] = self.f(v)
  File "/home/dan/Documents/fuzzbench/.venv/lib/python3.10/site-packages/pandas/core/apply.py", line 138, in f
    return func(x, *args, **kwargs)
  File "/home/dan/Documents/fuzzbench/.venv/lib/python3.10/site-packages/pandas/io/formats/style.py", line 3560, in _background_gradient
    rgbas = plt.cm.get_cmap(cmap)(norm(gmap))
AttributeError: module 'matplotlib.cm' has no attribute 'get_cmap'

I've tried searching, but I'm a bit stumped as to how it's possible for this to happen; although I am not particular experienced with pip / python so maybe matplotlib is just not installed properly?

DonggeLiu · 2024-05-20T12:51:53Z

am I allowed to run say 5 instances to test different parameter setups?

Yep sure, this requires changing this value to 5.

I'm thinking to add each setup as a different 'fuzzer' (in ./fuzzers) and then they can all run in one experiment. Do let me know if there's a better approach.

Yep this is the simplest way.
Unfortunately there is no better approach for now.

DonggeLiu · 2024-05-20T13:11:02Z

AttributeError: module 'matplotlib.cm' has no attribute 'get_cmap'

I reckon this is likely due to a mismatch version of matplotlib, which does not have get_cmap.
I did a quick experiment and found at least this version works:

Unfortunately we did not document the exact version used in FuzzBench.

DanBlackwell · 2024-05-20T13:49:36Z

Hopefully running the following should get all 4 up together:

/gcbrun run_experiment.py -a --experiment-config /opt/fuzzbench/service/experiment-config.yaml --experiment-name 2024-05-20-prescientfuzz-tuning --fuzzers prescientfuzz_no_backoff prescientfuzz_0_999_backoff prescientfuzz_0_9999_backoff prescientfuzz_0_99999_backoff

I'm guessing you might have to tweak something so that it doesn't merge with the other experiments and leave the graphs too messy?

DanBlackwell · 2024-05-20T14:11:57Z

AttributeError: module 'matplotlib.cm' has no attribute 'get_cmap'

I reckon this is likely due to a mismatch version of matplotlib, which does not have get_cmap. I did a quick experiment and found at least this version works:

Unfortunately we did not document the exact version used in FuzzBench.

I fixed it locally; get_cmap is still in matplotlib v3, it just seems that pandas was namespacing incorrectly. Here's my fix in case anyone else comes across the same thing through search:

Replace the bad line at the bottom of the callstack, here style.py:3560:

  File "/home/dan/Documents/fuzzbench/.venv/lib/python3.10/site-packages/pandas/io/formats/style.py", line 3560, in _background_gradient
    rgbas = plt.cm.get_cmap(cmap)(norm(gmap))

Remove the .cm, so:

-     rgbas = plt.cm.get_cmap(cmap)(norm(gmap))
+     rgbas = plt.get_cmap(cmap)(norm(gmap))

DonggeLiu · 2024-05-21T01:33:30Z

Hopefully running the following should get all 4 up together:
I'm guessing you might have to tweak something so that it doesn't merge with the other experiments and leave the graphs too messy?

Yep, if you want to compare these 4 only (i.e., no other fuzzers in the report), please set this value to false.

Do you still want to run 5 instances for each fuzzer/setup?
I am happy either way : )

am I allowed to run say 5 instances to test different parameter setups?

Yep sure, this requires changing this value to 5.

DonggeLiu · 2024-05-21T01:35:27Z

Replace the bad line at the bottom of the callstack, here style.py:3560:

  File "/home/dan/Documents/fuzzbench/.venv/lib/python3.10/site-packages/pandas/io/formats/style.py", line 3560, in _background_gradient
    rgbas = plt.cm.get_cmap(cmap)(norm(gmap))

Thanks, @DanBlackwell!
Let me add your solution to the issue.

DanBlackwell · 2024-06-12T10:28:47Z

gcbrun run_experiment.py -a --experiment-config /opt/fuzzbench/service/experiment-config.yaml --experiment-name 2024-06-12-l19f-openh264 --fuzzers libafl_19f5081 --benchmark openh264_decoder_fuzzer

This failed because: gcbrun_experiment.py: error: argument -f/--fuzzers: invalid choice: 'libafl_19f5081'. I guess it has been removed?

Ah, this doesn't need rerunning; I thought I'd point it out in case it's useful for you identifying the source of flakiness (if indeed it is flakiness).

DanBlackwell · 2024-06-12T10:31:05Z

How can I manually merge the results?

I guess you might have seen this? https://google.github.io/fuzzbench/developing-fuzzbench/custom_analysis_and_reports#generating-reports

added fuzzer setups don't appear

Sorry do you mean the new fuzzers you added did not show up in the report, or the past experiment results of baseline fuzzers (e.g., libfuzzer, afl) did not show up?

Yeah, so I want to generate a report manually; but merge in the data from other experiments. Downloading the data.csv.gz at the bottom of the page, I can see the format of the data; but I can't seem to merge the data from multiple experiments and get the generated report to show all the setups. Is there a script you use for merging private experiments with the standard experiments? If I can see that script, then I should be able to figure it out by myself.

DonggeLiu · 2024-06-13T00:34:28Z

analysis/generate_report.py is the script.

I recall I had to manually concat multiple data.csv files and then run the script to show all fuzzers in the past.

DanBlackwell · 2024-06-13T11:14:51Z

Good news is that I figured out how to generate the combined reports that I wanted now (I think I must have broken the CSV in some way before).

DanBlackwell · 2024-06-18T09:34:16Z

Hi @DonggeLiu , could you run the following command for me:

/gcbrun run_experiment.py -a --experiment-config /opt/fuzzbench/service/experiment-config.yaml --experiment-name 2024-06-18-prescientfuzz --fuzzers prescientfuzz_direct_neighbour_fast prescientfuzz_direct_neighbour_fast_w_backoff libafl_rand_scheduler

I believe this will be the final setup and then I'll have all I need to write up the experimentation in full.

DonggeLiu · 2024-06-19T01:08:11Z

/gcbrun run_experiment.py -a --experiment-config /opt/fuzzbench/service/experiment-config.yaml --experiment-name 2024-06-19-prescientfuzz --fuzzers prescientfuzz_direct_neighbour_fast prescientfuzz_direct_neighbour_fast_w_backoff libafl_rand_scheduler

DanBlackwell · 2024-06-19T09:46:41Z

Data: https://storage.googleapis.com/fuzzbench-data/index.html?prefix=2024-06-19-prescientfuzz/
Report: https://storage.googleapis.com/www.fuzzbench.com/reports/experimental/2024-06-19-prescientfuzz/index.html

DanBlackwell · 2024-06-19T09:59:51Z

I'm really sorry, I managed to make a typo there which broke what I was trying to test. @DonggeLiu any chance you could re-run it with?

/gcbrun run_experiment.py -a --experiment-config /opt/fuzzbench/service/experiment-config.yaml --experiment-name 2024-06-19b-prescientfuzz --fuzzers prescientfuzz_direct_neighbour_fast prescientfuzz_direct_neighbour_fast_w_backoff

DonggeLiu · 2024-07-02T23:51:53Z

/gcbrun run_experiment.py -a --experiment-config /opt/fuzzbench/service/experiment-config.yaml --experiment-name 2024-07-03-prescientfuzz --fuzzers prescientfuzz_direct_neighbour_fast prescientfuzz_direct_neighbour_fast_w_backoff

DanBlackwell · 2024-07-03T08:33:19Z

2024-07-03-prescientfuzz experiment links:
experiment data: data
experiment report: report

DanBlackwell · 2024-07-29T10:16:33Z

Hi @DonggeLiu , could you please run the following for me?

/gcbrun run_experiment.py -a --experiment-config /opt/fuzzbench/service/experiment-config.yaml --experiment-name 2024-07-29-prescientfuzz --fuzzers prescientfuzz

DonggeLiu · 2024-07-30T06:15:45Z

/gcbrun run_experiment.py -a --experiment-config /opt/fuzzbench/service/experiment-config.yaml --experiment-name 2024-07-30-prescientfuzz --fuzzers prescientfuzz

DanBlackwell · 2024-07-30T08:11:57Z

Experiment 2024-07-30-prescientfuzz data and results will be available later at:
The experiment data.
The experiment report(experimental).

DanBlackwell · 2024-07-31T16:50:26Z

Hi @DonggeLiu / @jonathanmetzman , I saw this comment that we may be able to start stuff ourselves: #2002 (comment), Is that just for the base fuzzer maintainers?

I would like to run the following as I've just found and fixed a pretty insidious bug:

/gcbrun run_experiment.py -a --experiment-config /opt/fuzzbench/service/experiment-config.yaml --experiment-name 2024-08-01-prescientfuzz --fuzzers prescientfuzz

DonggeLiu · 2024-08-01T03:38:38Z

/gcbrun run_experiment.py -a --experiment-config /opt/fuzzbench/service/experiment-config.yaml --experiment-name 2024-08-01-prescientfuzz --fuzzers prescientfuzz

DanBlackwell · 2024-08-01T06:41:59Z

Experiment 2024-08-01-prescientfuzz data and results will be available later at:
The experiment data.
The experiment report(experimental).

DonggeLiu · 2024-08-02T00:33:47Z

Hi @DonggeLiu / @jonathanmetzman , I saw this comment that we may be able to start stuff ourselves: #2002 (comment), Is that just for the base fuzzer maintainers?

Hi Dan,
Nope, that was a GitHub setting to enable CI (e.g., Fuzzers+Benchmarks) for non-first-time contributors (whose code has been merged into FB before). (PR experiment still requires maintainers.)
If you are interested, I reckon any minor fixes to FB should allow your CIs to run automatically.
BTW, I noticed Fuzzers+Benchmarks CIs have stopped running for a while. I am not exactly sure why, but maybe creating a new PR would help? (if needed.)

DanBlackwell · 2024-08-02T10:10:49Z

Hi @DonggeLiu , thanks for the info! Tbh, I think that this stuff is ready to merge, once I figure out what is going on with libjpeg (#2010); that may be on my end, but I can't seem to reproduce the old results even when using the exact commits that ran well in the past :/

Also, any chance you can see what is up with the coverage folder and report not being created in the last runs here and here?

DonggeLiu · 2024-08-03T10:29:13Z

Hi @DanBlackwell, instead of merging this PR, I can assist you merge another tiny (or even no-op) PR so that you can run CIs automatically.

We can close this PR if the experiments are done, and you can always reopen and modify the code.
Would that work for you?

DanBlackwell · 2024-08-03T10:50:28Z

@DonggeLiu , it is up to you. This is similar to AFLFast vs AFL in that all I've done is add a new scheduler to libafl. It's got a bit of a bump over libafl (see here), so my plan was to make this setup available to test against (i.e. merge this PR), but maybe that's just polluting the ./fuzzers directory?

If you think it's better to keep this separate, we can close this PR now. With respect to auto-running the CI, is that just the CI that does the build checks? Or does it also run some experiments too?

DonggeLiu · 2024-08-03T11:04:44Z

Thanks for the explanation and being considerate, @DanBlackwell.
The main reason is maintenance. For example, some dependencies may need to be updated after a few months/years, or some new benchmarks may be incompatible with old fuzzers. In the past, if anything fails, we had to consistently debug and update the dependencies of each fuzzer, and ensure they are compatible with FuzzBench infra and the benchmarks, which can take a long time. This is particularly challenging when FB updates its own dependencies.

PR experiments reduce this maintenance burden so that we can close PRs once all experiments are done.

DonggeLiu mentioned this pull request May 20, 2024

Update Python dependencies to update deprecated packages and resolve conflicts #1973

Open

Made fast setup for direct neighbours (limit BFS exploration depth)

39b1e6b

Added rand scheduler setup for libafl (to act as true control)

83645a8

Fix typo (>= instead of >)

d16da1a

DanBlackwell mentioned this pull request Jul 8, 2024

DGFuzz Testing #2000

Open

Added PrescientFuzz with compiler flag to expand binary conditionals

fd4b24b

Fix issue whereby basic block UUIDs were not unique

22039bf

DanBlackwell mentioned this pull request Aug 4, 2024

Verify recent error cause #2011

Closed

DanBlackwell changed the title ~~Prescientfuzz initial integration~~ Prescientfuzz testing Aug 4, 2024

DanBlackwell closed this Aug 5, 2024

Prescientfuzz testing #1982

Prescientfuzz testing #1982

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