WebAssembly / WebAssembly/binaryen

Invalid LEBs are incorrectly accepted by binary loading

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help wanted
Dominant language
WebAssembly
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Avg merge
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Merged PRs (30d)
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Description

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the linked WABT issue comment and trace Binaryen's binary-loading entry point to understand how invalid LEBs are currently accepted. Reproduce the reported input and add coverage for it; done means malformed LEB encodings are rejected during binary loading.

Written by the indexing model from the issue text.

Assessment

Tech stack
wasm
Domain
compilers
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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