From 7fc62d8178bfc362231436746457d14c44d238ff Mon Sep 17 00:00:00 2001 From: Neil Alexander Date: Fri, 4 Mar 2022 10:24:26 +0000 Subject: [PATCH] Fix a panic in `OnIncomingMessagesRequest` (#2250) It's possible for `GetStateEvent` to return `nil` if there was no error but the state event wasn't found. Therefore we need to be prepared for that case. This should fix #2247. --- syncapi/routing/messages.go | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/syncapi/routing/messages.go b/syncapi/routing/messages.go index 7cd54eef..9aef5db1 100644 --- a/syncapi/routing/messages.go +++ b/syncapi/routing/messages.go @@ -184,16 +184,18 @@ func OnIncomingMessagesRequest( // at least fetch the membership events for the users returned in chunk if LazyLoadMembers is set state := []gomatrixserverlib.ClientEvent{} if filter.LazyLoadMembers { - memberShipToUser := make(map[string]*gomatrixserverlib.HeaderedEvent) + membershipToUser := make(map[string]*gomatrixserverlib.HeaderedEvent) for _, evt := range clientEvents { - memberShip, err := db.GetStateEvent(req.Context(), roomID, gomatrixserverlib.MRoomMember, evt.Sender) + membership, err := db.GetStateEvent(req.Context(), roomID, gomatrixserverlib.MRoomMember, evt.Sender) if err != nil { util.GetLogger(req.Context()).WithError(err).Error("failed to get membership event for user") continue } - memberShipToUser[evt.Sender] = memberShip + if membership != nil { + membershipToUser[evt.Sender] = membership + } } - for _, evt := range memberShipToUser { + for _, evt := range membershipToUser { state = append(state, gomatrixserverlib.HeaderedToClientEvent(evt, gomatrixserverlib.FormatAll)) } }