Close a QUIC connection if there are too many unfinished streams being

net/quic/quic_session.cc

Index: net/quic/quic_session.cc
diff --git a/net/quic/quic_session.cc b/net/quic/quic_session.cc
index ab69d3d0e48926a28a8366e5e70d3d08da8facc3..f2277271695e183fa1dd83cf27320e676fb21176 100644
--- a/net/quic/quic_session.cc
+++ b/net/quic/quic_session.cc
@@ -430,6 +430,12 @@ void QuicSession::CloseStreamInner(QuicStreamId stream_id,
       stream->flow_controller()->IsEnabled()) {
     locally_closed_streams_highest_offset_[stream_id] =
         stream->flow_controller()->highest_received_byte_offset();
+    if (FLAGS_close_quic_connection_unfinished_streams &&
+        connection()->connected() &&
+        locally_closed_streams_highest_offset_.size() > max_open_streams_) {
+      // A buggy client may fail to send FIN/RSTs. Don't tolerate this.
+      connection_->SendConnectionClose(QUIC_TOO_MANY_UNFINISHED_STREAMS);
+    }
   }
 
   stream_map_.erase(it);