[FUZZ] JsFuzz - Assertion failed

[Buttaa]

I've identified a fuzzer crash and am contributing to the security of Ethereum 2!

I've done and provided the following:

• Checked to see if any other [FUZZ] issue already refers to that crasher
• Attached the crashing input (either attached to the issue as a .zip or .gz, or as a link to a file sharing service)
• Noted the beacon-fuzz version or commit used.
• Provided crash output
• Noted the command or fuzzer used to generate the crash
• Name of the original crash file
• (Optional but optimal) Checked if the crash can be consistently replicated by re-running the input.

Info to Reproduce

• Command run: e.g. docker run -it -v C:\Users\beacon-fuzz\eth2fuzz/workspace:/eth2fuzz/workspace eth2fuzz_lodestar continuously -q lodestar -t 3600
• Crasher file name: crash-4099857b077da452d2e335d436b77653877418e47bdbc2e892a8d6daf0869f5f
• Client exercised: lodestar
• Fuzzing engine used (if applicable):

Crash output

=================================================================
AssertionError [ERR_ASSERTION]: Assertion failed.
    at ECDSA.verify (/eth2fuzz/node_modules/bcrypto/lib/js/ecdsa.js:1:66376)
    at Object.verify (/eth2fuzz/node_modules/@chainsafe/discv5/lib/enr/v4.js:1:5109)
    at Map.verify (/eth2fuzz/node_modules/@chainsafe/discv5/lib/enr/enr.js:1:32482)
    at Function.decodeFromValues (/eth2fuzz/node_modules/@chainsafe/discv5/lib/enr/enr.js:1:26207)
    at Function.decode (/eth2fuzz/node_modules/@chainsafe/discv5/lib/enr/enr.js:1:26556)
    at Function.decodeTxt (/eth2fuzz/node_modules/@chainsafe/discv5/lib/enr/enr.js:1:26863)
    at Object.fuzz_lodestar_enr (/eth2fuzz/workspace/targets/js/lib.js:1:9181)
    at process.<anonymous> (/usr/lib/node_modules/jsfuzz/build/src/worker.js:63:30)
    at process.emit (events.js:314:20) {
  type: 'AssertionError',
  code: 'ERR_ASSERTION',
  generatedMessage: true,
  actual: false,
  expected: true,
  operator: '=='
}
crash was written to crash-4099857b077da452d2e335d436b77653877418e47bdbc2e892a8d6daf0869f5f
Worker exited

Your Environment

• Fuzzer ran: docker run -it -v C:\Users\beacon-fuzz\eth2fuzz/workspace:/eth2fuzz/workspace eth2fuzz_lodestar continuously -q lodestar -t 3600
• Version/Commit used: cbee3d9
• Operating System and version: windows10

crash-4099857b077da452d2e335d436b77653877418e47bdbc2e892a8d6daf0869f5f.zip

[pventuzelo]

Congratz, look valid to me.
Reported here: ChainSafe/discv5#70

[pventuzelo]

Fixed.
Thanks again @Buttaa