From 6cde7279a00452ed1ccc0ffc39d9011b016fadb3 Mon Sep 17 00:00:00 2001
From: Takashi Yano via Cygwin-patches <cygwin-patches@cygwin.com>
Date: Mon, 22 Feb 2021 22:30:17 +0900
Subject: Cygwin: console: Prevent NULL pointer access in close().

- There seems to be a case that shared_console_info is not set yet
  when close() is called. This patch adds guard for such case.
---
 winsup/cygwin/fhandler_console.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/winsup/cygwin/fhandler_console.cc b/winsup/cygwin/fhandler_console.cc
index 6ded9eabf..96a8729e8 100644
--- a/winsup/cygwin/fhandler_console.cc
+++ b/winsup/cygwin/fhandler_console.cc
@@ -1393,7 +1393,7 @@ fhandler_console::close ()
 
   release_output_mutex ();
 
-  if (con.owner == myself->pid)
+  if (shared_console_info && con.owner == myself->pid)
     {
       char name[MAX_PATH];
       shared_name (name, CONS_THREAD_SYNC, get_minor ());
-- 
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