[release/8.0] Fix pRequestInfo INVALID_POINTER_READ caused by GCs

[github-actions]

Fix pRequestInfo INVALID_POINTER_READ caused by GCs

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Backport of #50446 to release/8.0

Description

When using the IHttpSysRequestInfoFeature it's possible to hit invalid pointer read errors which causes a process crash. It's also possible to hit other issue caused by the invalid pointer. The error occurs when a GC moves to memory of the request's _backingBuffer before trying to access the RequestInfo property of IHttpSysRequestInfoFeature.

The fix is to adjust the pRequestInfo pointer similar to how other pointers in this class are adjusted.

Fixes #50445

Customer Impact

It's not possible to use the IHttpSysRequestInfoFeature without eventually crashing the process due to the INVALID_POINTER_READ.

Regression?

• Yes
• No

Risk

• High
• Medium
• Low

The change is very small an in-line with how pointers are used/updated within NativeRequestContext.

Verification

• Manual (required)
• Automated

I haven't been able to reproduce the crash locally, but I was able to confirm this is the root caused from a crash dump. I did verify this change did not regress this feature.

Packaging changes reviewed?

• Yes
• No
• N/A

---

When servicing release/2.1

• Make necessary changes in eng/PatchConfig.props

[ghost]

Hi @github-actions[bot]. This PR was just approved to be included in the upcoming servicing release. Somebody from the @dotnet/aspnet-build team will get it merged when the branches are open. Until then, please make sure all the CI checks pass and the PR is reviewed.

[wtgodbe]

@Tratcher can you get an approval on this? I can merge/enable auto-merge after that

[Tratcher]

This was approved by tactics, but @adityamandaleeka can sign off locally.

[adityamandaleeka]

Yup, approved