From 9ad320c1ad1a25558998ddfe47674511567fec57 Mon Sep 17 00:00:00 2001
From: Sebastian Rasmussen <sebras@gmail.com>
Date: Mon, 12 Feb 2024 14:46:22 +0800
Subject: [PATCH] Plug memory leak that happens upon error.

Origin: https://github.com/freeglut/freeglut/commit/9ad320c1ad1a25558998ddfe47674511567fec57

If fgStructure.CurrentMenu is set when glutAddMenuEntry() or
glutAddSubMenu() is called the allocated menuEntry variable will
leak. This commit postpones allocating menuEntry until after the
error checks, thereby plugging the memory leak.

This fixes CVE-2024-24258 and CVE-2024-24259.
---
 src/fg_menu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/fg_menu.c b/src/fg_menu.c
index 53112dc21..0da88901d 100644
--- a/src/fg_menu.c
+++ b/src/fg_menu.c
@@ -864,12 +864,12 @@ void FGAPIENTRY glutAddMenuEntry( const char* label, int value )
 {
     SFG_MenuEntry* menuEntry;
     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutAddMenuEntry" );
-    menuEntry = (SFG_MenuEntry *)calloc( sizeof(SFG_MenuEntry), 1 );
 
     freeglut_return_if_fail( fgStructure.CurrentMenu );
     if (fgState.ActiveMenus)
         fgError("Menu manipulation not allowed while menus in use.");
 
+    menuEntry = (SFG_MenuEntry *)calloc( sizeof(SFG_MenuEntry), 1 );
     menuEntry->Text = strdup( label );
     menuEntry->ID   = value;
 
@@ -888,7 +888,6 @@ void FGAPIENTRY glutAddSubMenu( const char *label, int subMenuID )
     SFG_Menu *subMenu;
 
     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutAddSubMenu" );
-    menuEntry = ( SFG_MenuEntry * )calloc( sizeof( SFG_MenuEntry ), 1 );
     subMenu = fgMenuByID( subMenuID );
 
     freeglut_return_if_fail( fgStructure.CurrentMenu );
@@ -897,6 +896,7 @@ void FGAPIENTRY glutAddSubMenu( const char *label, int subMenuID )
 
     freeglut_return_if_fail( subMenu );
 
+    menuEntry = ( SFG_MenuEntry * )calloc( sizeof( SFG_MenuEntry ), 1 );
     menuEntry->Text    = strdup( label );
     menuEntry->SubMenu = subMenu;
     menuEntry->ID      = -1;
