From 51998f16935742bb8bdc539a13d9f807965377e2 Mon Sep 17 00:00:00 2001
From: Alfonso Gregory <83477269+AtariDreams@users.noreply.github.com>
Date: Mon, 30 Aug 2021 15:00:29 -0400
Subject: Prevent writing to NULL if buffer is NULL

---
 cups/snprintf.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/cups/snprintf.c b/cups/snprintf.c
index 3c4685718..e4eb3e975 100644
--- a/cups/snprintf.c
+++ b/cups/snprintf.c
@@ -1,6 +1,7 @@
 /*
  * snprintf functions for CUPS.
  *
+ * Copyright © 2021 by OpenPrinting
  * Copyright © 2007-2019 by Apple Inc.
  * Copyright © 1997-2007 by Easy Software Products.
  *
@@ -322,7 +323,8 @@ _cups_vsnprintf(char       *buffer,	/* O - Output buffer */
   * Nul-terminate the string and return the number of characters needed.
   */
 
-  *bufptr = '\0';
+  if (bufptr)
+  	*bufptr = '\0';
 
   return (bytes);
 }
-- 
cgit v1.2.1