From 514ab399550a9bfcd4a5eb60e921d06a1d38af9e Mon Sep 17 00:00:00 2001
From: Nick Wellnhofer <wellnhofer@aevum.de>
Date: Wed, 11 Oct 2023 13:25:49 +0200
Subject: [PATCH] parser: Don't overwrite error state in xmlParseTextDecl

If a memory allocation fails, this could cause a null deref after
recent changes.

Found by OSS-Fuzz.

Reference:https://github.com/GNOME/libxml2/commit/514ab399550a9bfcd4a5eb60e921d06a1d38af9e
Conflict:xmlParseTextDecl

---
 parser.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/parser.c b/parser.c
index 54947aa..29524d2 100644
--- a/parser.c
+++ b/parser.c
@@ -6987,6 +6987,8 @@ xmlParseTextDecl(xmlParserCtxtPtr ctxt) {
 	xmlFatalErr(ctxt, XML_ERR_XMLDECL_NOT_FINISHED, NULL);
 	MOVETO_ENDTAG(CUR_PTR);
 	NEXT;
+	if (ctxt->instate == XML_PARSER_EOF)
+		return;
     }
 
     ctxt->instate = oldstate;
-- 
2.33.0