From 14dfeee4ed4fa9cf02594ca471404f5983fb666e Mon Sep 17 00:00:00 2001
From: Tatsuhiro Tsujikawa <tatsuhiro.t@gmail.com>
Date: Tue, 14 Jul 2020 00:12:07 +0900
Subject: [PATCH] nghttpx: Fix ubsan error

---
 src/shrpx_downstream.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/shrpx_downstream.cc b/src/shrpx_downstream.cc
index dc7762d0..2984776c 100644
--- a/src/shrpx_downstream.cc
+++ b/src/shrpx_downstream.cc
@@ -240,6 +240,10 @@ void Downstream::detach_downstream_connection() {
 
   auto handler = dconn_->get_client_handler();
 
+  if (!handler) {
+    return;
+  }
+
   handler->pool_downstream_connection(
       std::unique_ptr<DownstreamConnection>(dconn_.release()));
 }