grub: patch CVE-2024-45780

Cherry-pick patch mentioning this CVE.

(From OE-Core rev: 3c33dbc32859ce45743c507120317a562b1a897d)

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

2 files changed, 94 insertions, 0 deletions

diff --git a/meta/recipes-bsp/grub/files/CVE-2024-45780.patch b/meta/recipes-bsp/grub/files/CVE-2024-45780.patch
new file mode 100644
index 0000000000..1de0099f94
--- /dev/null
+++ b/meta/recipes-bsp/grub/files/CVE-2024-45780.patch
@@ -0,0 +1,93 @@
+From 0087bc6902182fe5cedce2d034c75a79cf6dd4f3 Mon Sep 17 00:00:00 2001
+From: Lidong Chen <lidong.chen@oracle.com>
+Date: Fri, 22 Nov 2024 06:27:58 +0000
+Subject: [PATCH] fs/tar: Integer overflow leads to heap OOB write
+
+Both namesize and linksize are derived from hd.size, a 12-digit octal
+number parsed by read_number(). Later direct arithmetic calculation like
+"namesize + 1" and "linksize + 1" may exceed the maximum value of
+grub_size_t leading to heap OOB write. This patch fixes the issue by
+using grub_add() and checking for an overflow.
+
+Fixes: CVE-2024-45780
+
+Reported-by: Nils Langius <nils@langius.de>
+Signed-off-by: Lidong Chen <lidong.chen@oracle.com>
+Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
+Reviewed-by: Alec Brown <alec.r.brown@oracle.com>
+
+CVE: CVE-2024-45780
+Upstream-Status: Backport [https://git.savannah.gnu.org/cgit/grub.git/commit/?id=0087bc6902182fe5cedce2d034c75a79cf6dd4f3]
+Signed-off-by: Peter Marko <peter.marko@siemens.com>
+---
+ grub-core/fs/tar.c | 23 ++++++++++++++++++-----
+ 1 file changed, 18 insertions(+), 5 deletions(-)
+
+diff --git a/grub-core/fs/tar.c b/grub-core/fs/tar.c
+index 646bce5eb..386c09022 100644
+--- a/grub-core/fs/tar.c
++++ b/grub-core/fs/tar.c
+@@ -25,6 +25,7 @@
+ #include <grub/mm.h>
+ #include <grub/dl.h>
+ #include <grub/i18n.h>
++#include <grub/safemath.h>
+ 
+ GRUB_MOD_LICENSE ("GPLv3+");
+ 
+@@ -76,6 +77,7 @@ grub_cpio_find_file (struct grub_archelp_data *data, char **name,
+ {
+   struct head hd;
+   int reread = 0, have_longname = 0, have_longlink = 0;
++  grub_size_t sz;
+ 
+   data->hofs = data->next_hofs;
+ 
+@@ -97,7 +99,11 @@ grub_cpio_find_file (struct grub_archelp_data *data, char **name,
+        {
+          grub_err_t err;
+          grub_size_t namesize = read_number (hd.size, sizeof (hd.size));
+-         *name = grub_malloc (namesize + 1);
++
++         if (grub_add (namesize, 1, &sz))
++           return grub_error (GRUB_ERR_BAD_FS, N_("name size overflow"));
++
++         *name = grub_malloc (sz);
+          if (*name == NULL)
+            return grub_errno;
+          err = grub_disk_read (data->disk, 0,
+@@ -117,15 +123,19 @@ grub_cpio_find_file (struct grub_archelp_data *data, char **name,
+        {
+          grub_err_t err;
+          grub_size_t linksize = read_number (hd.size, sizeof (hd.size));
+-         if (data->linkname_alloc < linksize + 1)
++
++         if (grub_add (linksize, 1, &sz))
++           return grub_error (GRUB_ERR_BAD_FS, N_("link size overflow"));
++
++         if (data->linkname_alloc < sz)
+            {
+              char *n;
+-             n = grub_calloc (2, linksize + 1);
++             n = grub_calloc (2, sz);
+              if (!n)
+                return grub_errno;
+              grub_free (data->linkname);
+              data->linkname = n;
+-             data->linkname_alloc = 2 * (linksize + 1);
++             data->linkname_alloc = 2 * (sz);
+            }
+ 
+          err = grub_disk_read (data->disk, 0,
+@@ -148,7 +158,10 @@ grub_cpio_find_file (struct grub_archelp_data *data, char **name,
+          while (extra_size < sizeof (hd.prefix)
+                 && hd.prefix[extra_size])
+            extra_size++;
+-         *name = grub_malloc (sizeof (hd.name) + extra_size + 2);
++
++         if (grub_add (sizeof (hd.name) + 2, extra_size, &sz))
++           return grub_error (GRUB_ERR_BAD_FS, N_("long name size overflow"));
++         *name = grub_malloc (sz);
+          if (*name == NULL)
+            return grub_errno;
+          if (hd.prefix[0])
diff --git a/meta/recipes-bsp/grub/grub2.inc b/meta/recipes-bsp/grub/grub2.inc
index f5112d773d..01d9be6bc2 100644
--- a/meta/recipes-bsp/grub/grub2.inc
+++ b/meta/recipes-bsp/grub/grub2.inc
@@ -21,6 +21,7 @@ SRC_URI = "${GNU_MIRROR}/grub/grub-${PV}.tar.gz \
            file://0001-misc-Implement-grub_strlcpy.patch \
            file://CVE-2024-45781.patch \
            file://CVE-2024-45782_CVE-2024-56737.patch \
+           file://CVE-2024-45780.patch \
 "
 
 SRC_URI[sha256sum] = "b30919fa5be280417c17ac561bb1650f60cfb80cc6237fa1e2b6f56154cb9c91"