grub: patch CVE-2024-45778 and CVE-2024-45779

Cherry-pick patch mentioning these CVEs.

(From OE-Core rev: 9ecee5f950f249d982b307bbdbe0e13e55f27b24)

Signed-off-by: Peter Marko <peter.marko@siemens.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

meta/recipes-bsp/grub/files/CVE-2024-45778_CVE-2024-45779.patch

@@ -0,0 +1,55 @@
+From 26db6605036bd9e5b16d9068a8cc75be63b8b630 Mon Sep 17 00:00:00 2001
+From: Daniel Axtens <dja@axtens.net>
+Date: Sat, 23 Mar 2024 15:59:43 +1100
+Subject: [PATCH] fs/bfs: Disable under lockdown
+
+The BFS is not fuzz-clean. Don't allow it to be loaded under lockdown.
+This will also disable the AFS.
+
+Fixes: CVE-2024-45778
+Fixes: CVE-2024-45779
+
+Reported-by: Nils Langius <nils@langius.de>
+Signed-off-by: Daniel Axtens <dja@axtens.net>
+Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
+
+CVE: CVE-2024-45778
+CVE: CVE-2024-45779
+Upstream-Status: Backport [https://git.savannah.gnu.org/cgit/grub.git/commit/?id=]
+Signed-off-by: Peter Marko <peter.marko@siemens.com>
+---
+ grub-core/fs/bfs.c | 9 +++++++--
+ 1 file changed, 7 insertions(+), 2 deletions(-)
+
+diff --git a/grub-core/fs/bfs.c b/grub-core/fs/bfs.c
+index 022f69fe2..78aeb051f 100644
+--- a/grub-core/fs/bfs.c
++++ b/grub-core/fs/bfs.c
+@@ -30,6 +30,7 @@
+ #include <grub/types.h>
+ #include <grub/i18n.h>
+ #include <grub/fshelp.h>
++#include <grub/lockdown.h>
+ 
+ GRUB_MOD_LICENSE ("GPLv3+");
+ 
+@@ -1106,7 +1107,10 @@ GRUB_MOD_INIT (bfs)
+ {
+   COMPILE_TIME_ASSERT (1 << LOG_EXTENT_SIZE ==
+ 		       sizeof (struct grub_bfs_extent));
+-  grub_fs_register (&grub_bfs_fs);
++  if (!grub_is_lockdown ())
++    {
++      grub_fs_register (&grub_bfs_fs);
++    }
+ }
+ 
+ #ifdef MODE_AFS
+@@ -1115,5 +1119,6 @@ GRUB_MOD_FINI (afs)
+ GRUB_MOD_FINI (bfs)
+ #endif
+ {
+-  grub_fs_unregister (&grub_bfs_fs);
++  if (!grub_is_lockdown ())
++    grub_fs_unregister (&grub_bfs_fs);
+ }

meta/recipes-bsp/grub/grub2.inc

@@ -33,6 +33,7 @@ SRC_URI = "${GNU_MIRROR}/grub/grub-${PV}.tar.gz \
            file://CVE-2024-45777.patch \
            file://CVE-2025-0690.patch \
            file://CVE-2025-1118.patch \
+           file://CVE-2024-45778_CVE-2024-45779.patch \
 "
 
 SRC_URI[sha256sum] = "b30919fa5be280417c17ac561bb1650f60cfb80cc6237fa1e2b6f56154cb9c91"