From a8b31e68c2331a1289e860ce07c8b80b855b7bf4 Mon Sep 17 00:00:00 2001
From: Nick Wellnhofer <wellnhofer@aevum.de>
Date: Mon, 21 Nov 2022 21:35:01 +0100
Subject: [PATCH] parser: Fix progress check when parsing character data

Skip over zero bytes to guarantee progress. Short-lived regression.
---
 parser.c          | 2 +-
 parserInternals.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/parser.c b/parser.c
index bc3718cd..0c65ac5d 100644
--- a/parser.c
+++ b/parser.c
@@ -4666,7 +4666,7 @@ xmlParseCharDataComplex(xmlParserCtxtPtr ctxt) {
 	    }
 	}
     }
-    if ((CUR != 0) && (!IS_CHAR(cur))) {
+    if ((ctxt->input->cur < ctxt->input->end) && (!IS_CHAR(cur))) {
 	/* Generate the error and skip the offending character */
         xmlFatalErrMsgInt(ctxt, XML_ERR_INVALID_CHAR,
                           "PCDATA invalid Char value %d\n",
diff --git a/parserInternals.c b/parserInternals.c
index 8af86ba5..c547a207 100644
--- a/parserInternals.c
+++ b/parserInternals.c
@@ -400,7 +400,7 @@ xmlNextChar(xmlParserCtxtPtr ctxt)
 	return;
     }
 
-    if ((*ctxt->input->cur == 0) &&
+    if ((ctxt->input->cur >= ctxt->input->end) &&
         (xmlParserInputGrow(ctxt->input, INPUT_CHUNK) <= 0)) {
         return;
     }