Fix concurrent map writes in presence queue

1 files changed, 4 insertions, 0 deletions

diff --git a/xmpp/gateway/gateway.go b/xmpp/gateway/gateway.go
index a4f3aca..779c6fe 100644
--- a/xmpp/gateway/gateway.go
+++ b/xmpp/gateway/gateway.go
@@ -3,6 +3,7 @@ package gateway
 import (
 	"encoding/xml"
 	"strings"
+	"sync"
 
 	"dev.narayana.im/narayana/telegabber/xmpp/extensions"
 
@@ -14,6 +15,7 @@ import (
 
 // Queue stores presences to send later
 var Queue = make(map[string]*stanza.Presence)
+var QueueLock = sync.Mutex{}
 
 // Jid stores the component's JID object
 var Jid *stanza.Jid
@@ -178,7 +180,9 @@ func SendPresence(component *xmpp.Component, to string, args ...args.V) error {
 			return err
 		}
 	} else {
+		QueueLock.Lock()
 		Queue[presence.From+presence.To] = &presence
+		QueueLock.Unlock()
 	}
 
 	return nil