[release/8.0-staging] Fix infinite loop in genCreateAddrMode #106767
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AndyAyersMS
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Aug 22, 2024
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This is still missing Tactics approval. Friendly reminder that Code Complete for the October Release is September 9. If we want this fix to be included in that release, please merge this PR before that date. |
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Backport of #106732 to release/8.0-staging
A customer reported issue (#106607) where an obfuscated app spins forever due to an infinite loop in JIT. It seems that the IL obfuscator is the culprit here since it generated a quite absurd (but valid) IL that JIT had no test coverage for. It is very unlikely it's possible to generate a similar pattern with plain C# since Roslyn does constant folding and overshift handling even for Debug.
/cc @EgorBo
Customer Impact
Impact: IL obfuscators may lead to freezes in the resulting app
Regression
Testing
A test is added. It's unlikely to be possible to hit it with plain C#.
Risk
Low