From fad84001086a78691254607dad8206620d13319c Mon Sep 17 00:00:00 2001
From: Rhodri James <rhodri@kynesim.co.uk>
Date: Tue, 25 Apr 2017 18:45:39 +0100
Subject: [PATCH] Validate parser parameter to XML_MemRealloc

---
 expat/lib/xmlparse.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/expat/lib/xmlparse.c b/expat/lib/xmlparse.c
index ac604f58..95e48fc1 100644
--- a/expat/lib/xmlparse.c
+++ b/expat/lib/xmlparse.c
@@ -2098,6 +2098,8 @@ XML_MemMalloc(XML_Parser parser, size_t size)
 void * XMLCALL
 XML_MemRealloc(XML_Parser parser, void *ptr, size_t size)
 {
+  if (parser == NULL)
+    return NULL;
   return REALLOC(ptr, size);
 }