File expat-CVE-2024-50602.patch of Package expat.36378

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 1/3] lib: Make XML_StopParser refuse to stop/suspend an
 unstarted parser

---
 expat/lib/expat.h    | 4 +++-
 expat/lib/xmlparse.c | 6 ++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

Index: expat-2.2.5/lib/expat.h
===================================================================
--- expat-2.2.5.orig/lib/expat.h
+++ expat-2.2.5/lib/expat.h
@@ -124,7 +124,9 @@ enum XML_Error {
   XML_ERROR_RESERVED_PREFIX_XMLNS,
   XML_ERROR_RESERVED_NAMESPACE_URI,
   /* Added in 2.2.1. */
-  XML_ERROR_INVALID_ARGUMENT
+  XML_ERROR_INVALID_ARGUMENT,
+  /* Added in 2.6.4. */
+  XML_ERROR_NOT_STARTED,
 };
 
 enum XML_Content_Type {
Index: expat-2.2.5/lib/xmlparse.c
===================================================================
--- expat-2.2.5.orig/lib/xmlparse.c
+++ expat-2.2.5/lib/xmlparse.c
@@ -2128,6 +2128,9 @@ XML_StopParser(XML_Parser parser, XML_Bo
   if (parser == NULL)
     return XML_STATUS_ERROR;
   switch (parser->m_parsingStatus.parsing) {
+  case XML_INITIALIZED:
+    parser->m_errorCode = XML_ERROR_NOT_STARTED;
+    return XML_STATUS_ERROR;
   case XML_SUSPENDED:
     if (resumable) {
       parser->m_errorCode = XML_ERROR_SUSPENDED;
@@ -2138,7 +2141,7 @@ XML_StopParser(XML_Parser parser, XML_Bo
   case XML_FINISHED:
     parser->m_errorCode = XML_ERROR_FINISHED;
     return XML_STATUS_ERROR;
-  default:
+  case XML_PARSING:
     if (resumable) {
 #ifdef XML_DTD
       if (parser->m_isParamEntity) {
@@ -2150,6 +2153,9 @@ XML_StopParser(XML_Parser parser, XML_Bo
     }
     else
       parser->m_parsingStatus.parsing = XML_FINISHED;
+    break;
+  default:
+    assert(0);
   }
   return XML_STATUS_OK;
 }
@@ -2414,6 +2420,9 @@ XML_ErrorString(enum XML_Error code)
   /* Added in 2.2.5. */
   case XML_ERROR_INVALID_ARGUMENT:  /* Constant added in 2.2.1, already */
     return XML_L("invalid argument");
+  /* Added in 2.6.4. */
+  case XML_ERROR_NOT_STARTED:
+    return XML_L("parser not started");
   }
   return NULL;
 }