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Fix data race on the socket disconnect handler - #46
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Merge upstream whatsmeow updates through fb386f1
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ChangesDisconnect handler safety
Workflow toolchain pinning
Priority: ⬇️ Low Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: ⚪ Minimal · up to This change synchronizes disconnect-handler updates during socket setup and shutdown, with concurrent socket lifecycle coverage. No current merge-blocking risk remains. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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Inline comments:
In `@socket/noisesocket_test.go`:
- Line 28: Update the deferred conn.CloseNow call in the test to assign its
error result to the blank identifier, satisfying errcheck without changing the
cleanup behavior.
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socket/framesocket.gosocket/noisesocket.gosocket/noisesocket_test.go
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| // Use SetOnDisconnect to change the handler while the socket is in use. | ||
| OnDisconnect func(ctx context.Context, remote bool) |
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Because OnDisconnect remains exported and writable, downstream users of the existing FrameSocket API can continue assigning it directly while the socket is active; such a write is not synchronized with Close and preserves the data race this change is intended to eliminate. A comment recommending the setter cannot enforce synchronization, so the locked handler should be stored in an unexported field and exposed only through synchronized accessors.
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FrameSocket.OnDisconnect was read and written without shared synchronization.
Close reads the handler while holding fs.lock, but newNoiseSocket installed it with a plain assignment and NoiseSocket.Stop cleared it with a plain assignment. When a remote close landed at the same time as socket setup or teardown, those accesses raced. The read pump calls Close(0) when the peer goes away, so this was reachable in normal operation, not just in tests.
This change adds FrameSocket.SetOnDisconnect, which replaces the handler under fs.lock, and switches both writers to use it. The read in Close already holds the lock, so every access is now serialized. The callback itself still runs in its own goroutine after the lock is released, so the locking behavior of Close is unchanged. A comment on the field points at the setter.
Also adds socket/noisesocket_test.go with concurrent close/setup/teardown tests plus table coverage of Stop with and without disconnect callbacks.
Verified:
Drive-by CI fix (no relation to the race): the Build (old) job installs goimports@latest, which now resolves to x/tools v0.50.0 and needs go >= 1.26, while the job pins go 1.25.14 with GOTOOLCHAIN=local. The same failure hits main. This PR pins the install to x/tools v0.49.0, the newest release that still builds on go 1.25.
Summary by CodeRabbit
Bug Fixes
New Features