[release/9.0-staging] handle case of Proc Index > MAX_SUPPORTED_CPUS by github-actions[bot] · Pull Request #109385 · dotnet/runtime (original) (raw)

Backport of #109295 to release/9.0-staging

/cc @mangod9

Customer Impact

• Customer reported
• Found internally

The issue occurs mainly when running a x86 .NET app with ServerGC on a machine with > 64 cores. If the app is scheduled to run on the higher cpu group it could lead to an AV.

Regression

• Yes
• No

[If yes, specify when the regression was introduced. Provide the PR or commit if known.]

Testing

Verified locally on a machine with >64 cores. Additionally support and customer has validated the fix.

Risk

Low

IMPORTANT: If this backport is for a servicing release, please verify that:

• The PR target branch is release/X.0-staging, not release/X.0.
• If the change touches code that ships in a NuGet package, you have added the necessary package authoring and gotten it explicitly reviewed.