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[release/6.0] Fix HTTTP/2 header decoder buffer allocation #85341

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@ManickaP ManickaP commented Apr 25, 2023

Fixes #78516

Backports #78862

Customer impact

Reliability problem in HTTP/2 (HPack), where some requests/responses with large headers (4KB+) that should be accepted might end up throwing exception.

This is a shared code with Kestrel so this affects server side as well - expect follow up PR in ASP.NET.

Testing

Added tests for the root cause and similar scenarios, increasing test coverage. All of those are ran in CI.

Risk

Low, as this affects only (rare) case of 4KB+ headers data buffers in HTTP/2 (HPack).

* Add test for literal field without name reference

* Fix header name buffer allocation

* Add more tests

* Unified QPackDecoderTest test files

* Fix variable name

* Fixed HPackDecoder and ported QPack tests

* Feedback

---------

Co-authored-by: ManickaP <mapichov@microsoft.com>
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ghost commented Apr 25, 2023

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Issue Details

Fixes #78516

Backports #78862

Customer impact

Reliability problem in HTTP/2, where some requests/responses with large headers that should be accepted might end up throwing exception.

  • In HPack case (HTTP/2 scenarios), the issue is much less likely to be hit as it requires 4KB of headers.

This is a shared code with Kestrel so this affects server side as well - expect follow up PR in ASP.NET.

Testing

Added tests for the root cause and similar scenarios, increasing test coverage. All of those are ran in CI.

Risk

Low, as this affects only HPack in (rare) case of 4KB+ sized headers data buffers.

Author: ManickaP
Assignees: -
Labels:

area-System.Net.Http

Milestone: -

@ManickaP
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Failures look like #76454, timeouts with machine provisioning and/or test execution.

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karelz commented Apr 28, 2023

Approved by Tactics (@SteveMCarroll) on 4/27 via email. Marking as servicing-approved.

@karelz karelz added the Servicing-approved Approved for servicing release label Apr 28, 2023
@karelz karelz added this to the 6.0.x milestone Apr 28, 2023
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@carlossanlop carlossanlop left a comment

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Same request as in the 7.0 PR - Rebase to release/6.0-staging, and make sure to merge before May 15th (code complete) if you intend to include this fix in the June Release.

@ghost ghost added the needs-author-action An issue or pull request that requires more info or actions from the author. label May 4, 2023
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ManickaP commented May 9, 2023

Closed in favor of #85976

@ManickaP ManickaP closed this May 9, 2023
@ManickaP ManickaP deleted the release/6.0 branch May 9, 2023 14:27
@dotnet dotnet locked as resolved and limited conversation to collaborators Jun 8, 2023
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5 participants