Drop SyncPlay requests from sessions that left the group

2026-09-05 14:23:37 +02:00
parent c80f05fad1
commit 5acb200c02
1 changed files with 5 additions and 2 deletions
@@ -332,8 +332,11 @@ namespace Emby.Server.Implementations.SyncPlay
                // Group lock required as Group is not thread-safe.
                lock (group)
                {
-                    // Make sure that session still belongs to this group.
-                    if (_sessionToGroupMap.TryGetValue(session.Id, out var checkGroup) && !checkGroup.GroupId.Equals(group.GroupId))
+                    // Make sure that session still belongs to this group. The lookup can fail
+                    // outright when the session left while this request was waiting on the group
+                    // lock, which is exactly the case this re-check exists to catch.
+                    if (!_sessionToGroupMap.TryGetValue(session.Id, out var checkGroup)
+                        || !checkGroup.GroupId.Equals(group.GroupId))
                    {
                        // Drop request.
                        return;