[v26.x backport] http2: fix write deadlock exposed by larger window sizes - #65953
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[v26.x backport] http2: fix write deadlock exposed by larger window sizes#65953panva wants to merge 2 commits into
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Signed-off-by: Tim Perry <pimterry@gmail.com> PR-URL: nodejs#63249 Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Stephen Belanger <admin@stephenbelanger.com> Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com> Signed-off-by: Filip Skokan <panva.ip@gmail.com> Assisted-by: Codex
This removes a guard (no reads while write pending) that creates this deadlock, which was added as a security mechanism. This guard is redundant given then other existing mechanisms, and a test is added to demonstrate that. Signed-off-by: Tim Perry <pimterry@gmail.com> PR-URL: nodejs#65440 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Filip Skokan <panva.ip@gmail.com> Signed-off-by: Filip Skokan <panva.ip@gmail.com> Assisted-by: Codex
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Codecov Report❌ Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## v26.x-staging #65953 +/- ##
=================================================
+ Coverage 90.24% 90.40% +0.15%
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Files 729 744 +15
Lines 242760 250426 +7666
Branches 46044 47770 +1726
=================================================
+ Hits 219073 226389 +7316
- Misses 15133 15334 +201
- Partials 8554 8703 +149
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richardlau
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Sep 10, 2026
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Backports #65440 with a prerequisite partial backport of #63249 to address the reset-cleanup hang seen in #65881.
The #63249 backport only adds peer-reset tracking and allows reset streams to be destroyed after readable
'end'without waiting for pending writes to finish. It preserves 26.x buffered reads, errors, and compat events, without taking the semver-major behavior changes. The #65440 patch is unchanged but present here so that both can be tested together.