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[CP] Guard certificate completion after crypto cleanup (#6445) - #6486
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Guillaume Hetier (guhetier) merged 1 commit intoNov 11, 2026
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Guillaume Hetier (guhetier) merged 1 commit into
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## Description While application certificate validation is pending, MsQuic pauses TLS processing and may buffer additional CRYPTO data. When the application completes validation, `QuicCryptoCustomCertValidationComplete` synchronously resumes TLS processing. That nested processing can complete the handshake and uninitialize the crypto receive state before returning to the completion function. The certificate path now guards that `QuicRecvBufferHasUnreadData` query with Crypto->Initialized . Ticket-validation assertion A similar code is present here too, but ticket validation occurs earlier in handshake processing, before handshake completion is expected to discard crypto state. Therefore, crypto state should always remain initialized when QuicCryptoCustomTicketValidationComplete reaches its unread-data query. The debug assertion is added for this invariant. ICM 31000000772553 ## Testing BVT and CI ## Documentation N/A Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: bd06d130-070d-44d0-a470-092953f341f3
Nithin Jose (nijosmsft)
approved these changes
Nov 11, 2026
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## release/2.6 #6486 +/- ##
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- Coverage 85.80% 85.54% -0.26%
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Files 60 60
Lines 19043 19044 +1
===============================================
- Hits 16340 16292 -48
- Misses 2703 2752 +49 ☔ View full report in Codecov by Harness. 🚀 New features to boost your workflow:
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Guillaume Hetier (guhetier)
merged commit Nov 11, 2026
7d2ef07
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release/2.6
492 of 496 checks passed
Guillaume Hetier (guhetier)
deleted the
guhetier/cp_guard_cert_completion_2_6_copilot
branch
November 11, 2026 21:18
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Description
While application certificate validation is pending, MsQuic pauses TLS processing and may buffer additional CRYPTO data.
When the application completes validation,
QuicCryptoCustomCertValidationCompletesynchronously resumes TLS processing. That nested processing can complete the handshake and uninitialize the crypto receive state before returning to the completion function.The certificate path now guards that
QuicRecvBufferHasUnreadDataquery with Crypto->Initialized .Ticket-validation assertion
A similar code is present here too, but ticket validation occurs earlier in handshake processing, before handshake completion is expected to discard crypto state. Therefore, crypto state should always remain initialized when QuicCryptoCustomTicketValidationComplete reaches its unread-data query. The debug assertion is added for this invariant.
ICM 31000000772553
Testing
BVT and CI
Documentation
N/A