File 0004-normal-main-Unregister-commands-on-module-unload.patch of Package grub2

From 41330d7fafe122d79d7a9ec28884c0771eb4fdf3 Mon Sep 17 00:00:00 2001
From: Alec Brown <alec.r.brown@oracle.com>
Date: Thu, 21 Aug 2025 21:14:07 +0000
Subject: [PATCH 4/7] normal/main: Unregister commands on module unload

When the normal module is loaded, the normal and normal_exit commands
are registered but aren't unregistered when the module is unloaded. We
need to add calls to grub_unregister_command() when unloading the module
for these commands.

Fixes: CVE-2025-61663
Fixes: CVE-2025-61664

Reported-by: Alec Brown <alec.r.brown@oracle.com>
Signed-off-by: Alec Brown <alec.r.brown@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
---
 grub-core/normal/main.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/grub-core/normal/main.c b/grub-core/normal/main.c
index 398169299..b77d55eb3 100644
--- a/grub-core/normal/main.c
+++ b/grub-core/normal/main.c
@@ -639,7 +639,7 @@ grub_mini_cmd_clear (struct grub_command *cmd __attribute__ ((unused)),
   return 0;
 }
 
-static grub_command_t cmd_clear;
+static grub_command_t cmd_clear, cmd_normal, cmd_normal_exit;
 
 static void (*grub_xputs_saved) (const char *str);
 static const char *features[] = {
@@ -682,10 +682,10 @@ GRUB_MOD_INIT(normal)
   grub_env_export ("pager");
 
   /* Register a command "normal" for the rescue mode.  */
-  grub_register_command ("normal", grub_cmd_normal,
-			 0, N_("Enter normal mode."));
-  grub_register_command ("normal_exit", grub_cmd_normal_exit,
-			 0, N_("Exit from normal mode."));
+  cmd_normal = grub_register_command ("normal", grub_cmd_normal,
+				      0, N_("Enter normal mode."));
+  cmd_normal_exit = grub_register_command ("normal_exit", grub_cmd_normal_exit,
+					   0, N_("Exit from normal mode."));
 
   /* Reload terminal colors when these variables are written to.  */
   grub_register_variable_hook ("color_normal", NULL, grub_env_write_color_normal);
@@ -727,4 +727,6 @@ GRUB_MOD_FINI(normal)
   grub_register_variable_hook ("color_highlight", NULL, NULL);
   grub_fs_autoload_hook = 0;
   grub_unregister_command (cmd_clear);
+  grub_unregister_command (cmd_normal);
+  grub_unregister_command (cmd_normal_exit);
 }
-- 
2.51.1