Fix uint32 overflow in receive buffer growth - #6226
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Gaurav Singh (gaurav2699) wants to merge 20 commits into
Open
Fix uint32 overflow in receive buffer growth#6226Gaurav Singh (gaurav2699) wants to merge 20 commits into
Gaurav Singh (gaurav2699) wants to merge 20 commits into
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #6226 +/- ##
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- Coverage 86.02% 85.45% -0.58%
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Files 60 60
Lines 18984 19001 +17
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- Hits 16331 16237 -94
- Misses 2653 2764 +111 ☔ View full report in Codecov by Harness. 🚀 New features to boost your workflow:
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Guillaume Hetier (guhetier)
approved these changes
Aug 18, 2026
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Description
Cap internally-managed stream receive buffers at 0x80000000 during
auto-tuning and compute buffer growth in 64-bit, rejecting sizes above
UINT32_MAX. This prevents a uint32 wrap that could spin the growth loop
forever when a very large ConnFlowControlWindow is configured. App-owned
mode behavior is unchanged.
Fixes https://dev.azure.com/microsoft/OS/_workitems/edit/62826267/
Testing
Added RecvBufferGrowthTest.WriteGrowthOverflow to cover the overflow
boundary. Existing recv buffer tests pass.
Documentation
NA