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Pull in the s390 auto-lockdown patch

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RHEL had a patch to automatically lock down s390 which never made its
way up to Fedora.

Signed-off-by: Jeremy Cline <jcline@redhat.com>
This commit is contained in:
Jeremy Cline 2020-01-10 12:39:19 -05:00
parent 7cc57104b0
commit 59eca17780
2 changed files with 68 additions and 0 deletions
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2
kernel.spec
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@ -802,6 +802,8 @@ Patch204: efi-secureboot.patch
Patch205: lift-lockdown-sysrq.patch
Patch206: s390-Lock-down-the-kernel-when-the-IPL-secure-flag-i.patch
# 300 - ARM patches
Patch300: arm64-Add-option-of-13-for-FORCE_MAX_ZONEORDER.patch

66
s390-Lock-down-the-kernel-when-the-IPL-secure-flag-i.patch Normal file
View File

@ -0,0 +1,66 @@
From eaa12998810bd9db85dec71f0da55fd5aae73d0f Mon Sep 17 00:00:00 2001
From: Jeremy Cline <jcline@redhat.com>
Date: Wed, 30 Oct 2019 14:37:49 +0000
Subject: [PATCH] s390: Lock down the kernel when the IPL secure flag is set
Automatically lock down the kernel to LOCKDOWN_CONFIDENTIALITY_MAX if
the IPL secure flag is set.
Suggested-by: Philipp Rudo <prudo@redhat.com>
Signed-off-by: Jeremy Cline <jcline@redhat.com>
---
arch/s390/include/asm/ipl.h | 1 +
arch/s390/kernel/ipl.c | 5 +++++
arch/s390/kernel/setup.c | 4 ++++
3 files changed, 10 insertions(+)
diff --git a/arch/s390/include/asm/ipl.h b/arch/s390/include/asm/ipl.h
index 084e71b7272a..1d1b5ec7357b 100644
--- a/arch/s390/include/asm/ipl.h
+++ b/arch/s390/include/asm/ipl.h
@@ -109,6 +109,7 @@ int ipl_report_add_component(struct ipl_report *report, struct kexec_buf *kbuf,
unsigned char flags, unsigned short cert);
int ipl_report_add_certificate(struct ipl_report *report, void *key,
unsigned long addr, unsigned long len);
+bool ipl_get_secureboot(void);
/*
* DIAG 308 support
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 6837affc19e8..2d3f3d00e05c 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -1842,3 +1842,8 @@ int ipl_report_free(struct ipl_report *report)
}
#endif
+
+bool ipl_get_secureboot(void)
+{
+ return !!ipl_secure_flag;
+}
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 9cbf490fd162..0510ecdfc3f6 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -49,6 +49,7 @@
#include <linux/memory.h>
#include <linux/compat.h>
#include <linux/start_kernel.h>
+#include <linux/security.h>
#include <asm/boot_data.h>
#include <asm/ipl.h>
@@ -1096,6 +1097,9 @@ void __init setup_arch(char **cmdline_p)
log_component_list();
+ if (ipl_get_secureboot())
+ security_lock_kernel_down("Secure IPL mode", LOCKDOWN_CONFIDENTIALITY_MAX);
+
/* Have one command line that is parsed and saved in /proc/cmdline */
/* boot_command_line has been already set up in early.c */
*cmdline_p = boot_command_line;
--
2.24.1