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Protect txnReq.newEvents with mutex (#1587)

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* Protect txnReq.newEvents and txnReq.haveEvents with mutex

* Missing defer

* Remove t.haveEventsMutex
This commit is contained in:
Neil Alexander 2020-11-18 11:31:58 +00:00 committed by GitHub
parent 3bcb003248
commit 265cf5e835
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 6 additions and 1 deletions
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7
federationapi/routing/send.go
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@ -111,7 +111,8 @@ type txnReq struct {
// which the roomserver is unaware of. // which the roomserver is unaware of.
haveEvents map[string]*gomatrixserverlib.HeaderedEvent haveEvents map[string]*gomatrixserverlib.HeaderedEvent
// new events which the roomserver does not know about // new events which the roomserver does not know about
newEvents map[string]bool newEvents map[string]bool
newEventsMutex sync.RWMutex
} }
// A subset of FederationClient functionality that txn requires. Useful for testing. // A subset of FederationClient functionality that txn requires. Useful for testing.
@ -264,6 +265,8 @@ func (e missingPrevEventsError) Error() string {
} }
func (t *txnReq) haveEventIDs() map[string]bool { func (t *txnReq) haveEventIDs() map[string]bool {
t.newEventsMutex.RLock()
defer t.newEventsMutex.RUnlock()
result := make(map[string]bool, len(t.haveEvents)) result := make(map[string]bool, len(t.haveEvents))
for eventID := range t.haveEvents { for eventID := range t.haveEvents {
if t.newEvents[eventID] { if t.newEvents[eventID] {
@ -1144,6 +1147,8 @@ func (t *txnReq) lookupEvent(ctx context.Context, roomVersion gomatrixserverlib.
return nil, verifySigError{event.EventID(), err} return nil, verifySigError{event.EventID(), err}
} }
h := event.Headered(roomVersion) h := event.Headered(roomVersion)
t.newEventsMutex.Lock()
t.newEvents[h.EventID()] = true t.newEvents[h.EventID()] = true
t.newEventsMutex.Unlock()
return h, nil return h, nil
} }