[release/9.0] Fix infinite loop in genCreateAddrMode #106766
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jeffschwMSFT
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Aug 21, 2024
JulieLeeMSFT
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Ping @AndyAyersMS for code review for rc2 backport. |
AndyAyersMS
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This was referenced Aug 22, 2024
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Backport of #106732 to release/9.0
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