1 files changed, 57 insertions, 0 deletions

diff --git a/meta/recipes-bsp/grub/files/CVE-2020-14372_3.patch b/meta/recipes-bsp/grub/files/CVE-2020-14372_3.patch
new file mode 100644
index 0000000000..93fdd2cb1a
--- /dev/null
+++ b/meta/recipes-bsp/grub/files/CVE-2020-14372_3.patch
@@ -0,0 +1,57 @@
+From bfb9c44298aa202c176fef8dc5ea48f9b0e76e5e Mon Sep 17 00:00:00 2001
+From: Javier Martinez Canillas <javierm@redhat.com>
+Date: Tue, 2 Feb 2021 19:59:48 +0100
+Subject: [PATCH] kern/lockdown: Set a variable if the GRUB is locked down
+
+It may be useful for scripts to determine whether the GRUB is locked
+down or not. Add the lockdown variable which is set to "y" when the GRUB
+is locked down.
+
+Suggested-by: Dimitri John Ledkov <xnox@ubuntu.com>
+Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
+Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
+
+Upstream-Status: Backport [https://git.savannah.gnu.org/cgit/grub.git/commit/?id=d90367471779c240e002e62edfb6b31fc85b4908]
+CVE: CVE-2020-14372
+Signed-off-by: Marta Rybczynska <marta.rybczynska@huawei.com>
+---
+ docs/grub.texi            | 3 +++
+ grub-core/kern/lockdown.c | 4 ++++
+ 2 files changed, 7 insertions(+)
+
+diff --git a/docs/grub.texi b/docs/grub.texi
+index d778bfb..5e6cace 100644
+--- a/docs/grub.texi
++++ b/docs/grub.texi
+@@ -5802,6 +5802,9 @@ The GRUB can be locked down when booted on a secure boot environment, for exampl
+ if the UEFI secure boot is enabled. On a locked down configuration, the GRUB will
+ be restricted and some operations/commands cannot be executed.
+ 
++The @samp{lockdown} variable is set to @samp{y} when the GRUB is locked down.
++Otherwise it does not exit.
++
+ @node Platform limitations
+ @chapter Platform limitations
+ 
+diff --git a/grub-core/kern/lockdown.c b/grub-core/kern/lockdown.c
+index 1e56c0b..0bc70fd 100644
+--- a/grub-core/kern/lockdown.c
++++ b/grub-core/kern/lockdown.c
+@@ -18,6 +18,7 @@
+  */
+ 
+ #include <grub/dl.h>
++#include <grub/env.h>
+ #include <grub/file.h>
+ #include <grub/lockdown.h>
+ #include <grub/verify.h>
+@@ -71,6 +72,9 @@ grub_lockdown (void)
+   lockdown = GRUB_LOCKDOWN_ENABLED;
+ 
+   grub_verifier_register (&lockdown_verifier);
++
++  grub_env_set ("lockdown", "y");
++  grub_env_export ("lockdown");
+ }
+ 
+ int