TheArchive/tailscale
1
0
Fork 0
mirror of https://github.com/tailscale/tailscale.git synced 2025-12-01 17:49:02 +00:00
Code Issues Packages Projects Releases Wiki Activity

feature/relayserver: don't publish from within a subscribe fn goroutine

Browse Source 
Updates #17830

Signed-off-by: Jordan Whited <jordan@tailscale.com>
This commit is contained in:
Jordan Whited
2025-11-21 11:10:24 -08:00
committed by Jordan Whited
parent e7f5ca1d5e
commit 9245c7131b
1 changed files with 6 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
feature/relayserver/relayserver.go
View File

@@ -147,7 +147,12 @@ func (e *extension) onAllocReq(req magicsock.UDPRelayAllocReq) {
e.logf("error allocating endpoint: %v", err)
return
}
e.respPub.Publish(magicsock.UDPRelayAllocResp{
// Take a defensive stance around publishing from within an
// [*eventbus.SubscribeFunc] by publishing from a separate goroutine. At the
// time of writing (2025-11-21), publishing from within the
// [*eventbus.SubscribeFunc] goroutine is potentially unsafe if publisher
// and subscriber share a lock.
go e.respPub.Publish(magicsock.UDPRelayAllocResp{
ReqRxFromNodeKey: req.RxFromNodeKey,
ReqRxFromDiscoKey: req.RxFromDiscoKey,
Message: &disco.AllocateUDPRelayEndpointResponse{