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Panic on zkVM argv and env overflows#158018

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kevin-valerio wants to merge 1 commit into
rust-lang:mainfrom
kevin-valerio:fix-zkvm-length-overflow
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Panic on zkVM argv and env overflows#158018
kevin-valerio wants to merge 1 commit into
rust-lang:mainfrom
kevin-valerio:fix-zkvm-length-overflow

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@kevin-valerio

@kevin-valerio kevin-valerio commented Jun 17, 2026

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Fixes #158016

I'm not sure if the trade-of is worth, waiting for other people opinions on that. My take was that because this overflow is directly impacted from the host it should be avoided at all cost since this overflow can ultimately lead to slice::from_raw_parts(ptr, len) with the huge length

@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Jun 17, 2026
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rustbot commented Jun 17, 2026

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Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @Mark-Simulacrum (or someone else) some time within the next two weeks.

Please see the contribution instructions for more information. Namely, in order to ensure the minimum review times lag, PR authors and assigned reviewers should ensure that the review label (S-waiting-on-review and S-waiting-on-author) stays updated, invoking these commands when appropriate:

  • @rustbot author: the review is finished, PR author should check the comments and take action accordingly
  • @rustbot review: the author is ready for a review, this PR will be queued again in the reviewer's queue
Why was this reviewer chosen?

The reviewer was selected based on:

  • Owners of files modified in this PR: @ChrisDenton, libs
  • @ChrisDenton, libs expanded to 12 candidates
  • Random selection from 6 candidates

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zkVM args and env length can overflow

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