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ipn/ipnlocal: fix eventbus data race

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Fixes #17252

Change-Id: Id969fca750a48fb43431c53f3e0631bd9bd496d1
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick 2025-09-23 14:42:11 -07:00 committed by Brad Fitzpatrick
parent 4af15a1148
commit 87ccfbd250
1 changed files with 6 additions and 2 deletions
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8
ipn/ipnlocal/local.go
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@ -535,8 +535,6 @@ func NewLocalBackend(logf logger.Logf, logID logid.PublicID, sys *tsd.System, lo
captiveCancel: nil, // so that we start checkCaptivePortalLoop when Running
needsCaptiveDetection: make(chan bool),
}
ec := b.Sys().Bus.Get().Client("ipnlocal.LocalBackend")
b.eventSubs = ec.Monitor(b.consumeEventbusTopics(ec))
nb := newNodeBackend(ctx, b.sys.Bus.Get())
b.currentNodeAtomic.Store(nb)
@ -604,6 +602,12 @@ func NewLocalBackend(logf logger.Logf, logID logid.PublicID, sys *tsd.System, lo
}
}
}
// Start the event bus late, once all the assignments above are done.
// (See previous race in tailscale/tailscale#17252)
ec := b.Sys().Bus.Get().Client("ipnlocal.LocalBackend")
b.eventSubs = ec.Monitor(b.consumeEventbusTopics(ec))
return b, nil
}