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src,lib: handle invalid stdio configuration gracefully #55942

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Fixes an issue where malformed or unexpected stdio configurations could cause crashes or undefined behavior during child process spawning. This patch ensures robust validation of stdio entries:

Fixes: #55932


I don't think we should patch user-space misconfiguration. This is a rare case and, could be extrapolated to different issues. I never faced an issue due to proto mutation. But I personally don't think we should patch that (except for the native layer.)

Fixes an issue where malformed or unexpected stdio configurations
could cause crashes or undefined behavior during child process
spawning. This patch ensures robust validation of stdio entries:

Fixes: nodejs#55932
Signed-off-by: Juan José Arboleda <[email protected]>
@nodejs-github-bot nodejs-github-bot added c++ Issues and PRs that require attention from people who are familiar with C++. child_process Issues and PRs related to the child_process subsystem. needs-ci PRs that need a full CI run. labels Nov 21, 2024
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codecov bot commented Nov 21, 2024

Codecov Report

Attention: Patch coverage is 69.23077% with 4 lines in your changes missing coverage. Please review.

Project coverage is 88.00%. Comparing base (f270462) to head (e079e6e).
Report is 3 commits behind head on main.

Files with missing lines Patch % Lines
lib/internal/child_process.js 42.85% 4 Missing ⚠️
Additional details and impacted files
@@            Coverage Diff             @@
##             main   #55942      +/-   ##
==========================================
- Coverage   88.49%   88.00%   -0.50%     
==========================================
  Files         653      653              
  Lines      187728   187741      +13     
  Branches    36182    35875     -307     
==========================================
- Hits       166136   165221     -915     
- Misses      14814    15700     +886     
- Partials     6778     6820      +42     
Files with missing lines Coverage Δ
src/process_wrap.cc 84.81% <100.00%> (+0.49%) ⬆️
lib/internal/child_process.js 93.87% <42.85%> (-1.11%) ⬇️

... and 91 files with indirect coverage changes

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FATAL ERROR: v8::ToLocalChecked Empty MaybeLocal
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