From e72eda101e58d7933244979486d249a06b3feac6 Mon Sep 17 00:00:00 2001
From: Nick Wellnhofer <wellnhofer@aevum.de>
Date: Fri, 28 Jun 2024 01:41:36 +0200
Subject: [PATCH] parser: Add NULL check in xmlNewIOInputStream

---
 parserInternals.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/parserInternals.c b/parserInternals.c
index f0c5d594..c33e0d10 100644
--- a/parserInternals.c
+++ b/parserInternals.c
@@ -1209,7 +1209,7 @@ xmlSwitchEncoding(xmlParserCtxtPtr ctxt, xmlCharEncoding enc)
 
 /**
  * xmlSwitchInputEncodingName:
- * @ctxt:  the parser context, only for error reporting
+ * @ctxt:  the parser context
  * @input:  the input strea,
  * @encoding:  the encoding name
  *
@@ -2079,7 +2079,7 @@ xmlNewIOInputStream(xmlParserCtxtPtr ctxt, xmlParserInputBufferPtr buf,
     xmlParserInputPtr input;
     const char *encoding;
 
-    if (buf == NULL)
+    if ((ctxt == NULL) || (buf == NULL))
         return(NULL);
 
     input = xmlNewInputInternal(buf, NULL);