File mozjs52-CVE-2024-50602.patch of Package mozjs52.42029

From 51c7019069b862e88d94ed228659e70bddd5de09 Mon Sep 17 00:00:00 2001
From: Sebastian Pipping <sebastian@pipping.org>
Date: Mon, 21 Oct 2024 01:42:54 +0200
Subject: [PATCH] lib: Make XML_StopParser refuse to stop/suspend an unstarted parser

--- a/parser/expat/lib/expat.h
+++ b/parser/expat/lib/expat.h
@@ -95,7 +95,9 @@
   /* Added in 2.0. */
   XML_ERROR_RESERVED_PREFIX_XML,
   XML_ERROR_RESERVED_PREFIX_XMLNS,
-  XML_ERROR_RESERVED_NAMESPACE_URI
+  XML_ERROR_RESERVED_NAMESPACE_URI,
+  /* Added in 2.6.4. */
+  XML_ERROR_NOT_STARTED,
 };
 
 enum XML_Content_Type {

--- a/parser/expat/lib/xmlparse.c
+++ b/parser/expat/lib/xmlparse.c
@@ -1789,6 +1789,9 @@
 XML_StopParser(XML_Parser parser, XML_Bool resumable)
 {
   switch (ps_parsing) {
+  case XML_INITIALIZED:
+    parser->m_errorCode = XML_ERROR_NOT_STARTED;
+    return XML_STATUS_ERROR;
   case XML_SUSPENDED:
     if (resumable) {
       errorCode = XML_ERROR_SUSPENDED;
@@ -1799,7 +1802,7 @@
   case XML_FINISHED:
     errorCode = XML_ERROR_FINISHED;
     return XML_STATUS_ERROR;
-  default:
+  case XML_PARSING:
     if (resumable) {
 #ifdef XML_DTD
       if (isParamEntity) {
@@ -1811,6 +1814,9 @@
     }
     else
       ps_parsing = XML_FINISHED;
+    break;
+  default:
+    assert(0);
   }
   return XML_STATUS_OK;
 }