diff options
Diffstat (limited to '0001-efi-Lock-down-the-kernel-if-booted-in-secure-boot-mo.patch')
| -rw-r--r-- | 0001-efi-Lock-down-the-kernel-if-booted-in-secure-boot-mo.patch | 72 |
1 files changed, 0 insertions, 72 deletions
diff --git a/0001-efi-Lock-down-the-kernel-if-booted-in-secure-boot-mo.patch b/0001-efi-Lock-down-the-kernel-if-booted-in-secure-boot-mo.patch deleted file mode 100644 index cf585439d..000000000 --- a/0001-efi-Lock-down-the-kernel-if-booted-in-secure-boot-mo.patch +++ /dev/null @@ -1,72 +0,0 @@ -From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 -From: David Howells <dhowells@redhat.com> -Date: Mon, 30 Sep 2019 21:28:16 +0000 -Subject: [PATCH] efi: Lock down the kernel if booted in secure boot mode - -UEFI Secure Boot provides a mechanism for ensuring that the firmware -will only load signed bootloaders and kernels. Certain use cases may -also require that all kernel modules also be signed. Add a -configuration option that to lock down the kernel - which includes -requiring validly signed modules - if the kernel is secure-booted. - -Upstream Status: RHEL only -Signed-off-by: David Howells <dhowells@redhat.com> -Signed-off-by: Jeremy Cline <jcline@redhat.com> ---- - arch/x86/kernel/setup.c | 8 ++++++++ - security/lockdown/Kconfig | 13 +++++++++++++ - 2 files changed, 21 insertions(+) - -diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c -index c9de4b36ca51..a1a012702915 100644 ---- a/arch/x86/kernel/setup.c -+++ b/arch/x86/kernel/setup.c -@@ -18,6 +18,7 @@ - #include <linux/sfi.h> - #include <linux/hugetlb.h> - #include <linux/tboot.h> -+#include <linux/security.h> - #include <linux/usb/xhci-dbgp.h> - - #include <uapi/linux/mount.h> -@@ -1104,6 +1105,13 @@ void __init setup_arch(char **cmdline_p) - if (efi_enabled(EFI_BOOT)) - efi_init(); - -+ efi_set_secure_boot(boot_params.secure_boot); -+ -+#ifdef CONFIG_LOCK_DOWN_IN_EFI_SECURE_BOOT -+ if (efi_enabled(EFI_SECURE_BOOT)) -+ security_lock_kernel_down("EFI Secure Boot mode", LOCKDOWN_INTEGRITY_MAX); -+#endif -+ - dmi_setup(); - - /* -diff --git a/security/lockdown/Kconfig b/security/lockdown/Kconfig -index e84ddf484010..d0501353a4b9 100644 ---- a/security/lockdown/Kconfig -+++ b/security/lockdown/Kconfig -@@ -16,6 +16,19 @@ config SECURITY_LOCKDOWN_LSM_EARLY - subsystem is fully initialised. If enabled, lockdown will - unconditionally be called before any other LSMs. - -+config LOCK_DOWN_IN_EFI_SECURE_BOOT -+ bool "Lock down the kernel in EFI Secure Boot mode" -+ default n -+ depends on EFI && SECURITY_LOCKDOWN_LSM_EARLY -+ help -+ UEFI Secure Boot provides a mechanism for ensuring that the firmware -+ will only load signed bootloaders and kernels. Secure boot mode may -+ be determined from EFI variables provided by the system firmware if -+ not indicated by the boot parameters. -+ -+ Enabling this option results in kernel lockdown being triggered if -+ EFI Secure Boot is set. -+ - choice - prompt "Kernel default lockdown mode" - default LOCK_DOWN_KERNEL_FORCE_NONE --- -2.28.0 - |