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-rw-r--r--configs/fedora/generic/CONFIG_ALLOW_LOCKDOWN_LIFT_BY_SYSRQ1
-rw-r--r--kernel-aarch64-debug-fedora.config1
-rw-r--r--kernel-aarch64-fedora.config1
-rw-r--r--kernel-armv7hl-debug-fedora.config1
-rw-r--r--kernel-armv7hl-fedora.config1
-rw-r--r--kernel-armv7hl-lpae-debug-fedora.config1
-rw-r--r--kernel-armv7hl-lpae-fedora.config1
-rw-r--r--kernel-i686-debug-fedora.config1
-rw-r--r--kernel-i686-fedora.config1
-rw-r--r--kernel-ppc64le-debug-fedora.config1
-rw-r--r--kernel-ppc64le-fedora.config1
-rw-r--r--kernel-s390x-debug-fedora.config1
-rw-r--r--kernel-s390x-fedora.config1
-rw-r--r--kernel-x86_64-debug-fedora.config1
-rw-r--r--kernel-x86_64-fedora.config1
-rw-r--r--kernel.spec5
-rw-r--r--lift-lockdown-sysrq.patch287
17 files changed, 3 insertions, 304 deletions
diff --git a/configs/fedora/generic/CONFIG_ALLOW_LOCKDOWN_LIFT_BY_SYSRQ b/configs/fedora/generic/CONFIG_ALLOW_LOCKDOWN_LIFT_BY_SYSRQ
deleted file mode 100644
index 40a287f0f..000000000
--- a/configs/fedora/generic/CONFIG_ALLOW_LOCKDOWN_LIFT_BY_SYSRQ
+++ /dev/null
@@ -1 +0,0 @@
-CONFIG_ALLOW_LOCKDOWN_LIFT_BY_SYSRQ=y
diff --git a/kernel-aarch64-debug-fedora.config b/kernel-aarch64-debug-fedora.config
index 04621aa0b..52ca6b586 100644
--- a/kernel-aarch64-debug-fedora.config
+++ b/kernel-aarch64-debug-fedora.config
@@ -189,7 +189,6 @@ CONFIG_AK8975=m
CONFIG_AL_FIC=y
CONFIG_ALIM1535_WDT=m
CONFIG_ALIM7101_WDT=m
-CONFIG_ALLOW_LOCKDOWN_LIFT_BY_SYSRQ=y
# CONFIG_ALTERA_FREEZE_BRIDGE is not set
# CONFIG_ALTERA_MBOX is not set
CONFIG_ALTERA_MSGDMA=m
diff --git a/kernel-aarch64-fedora.config b/kernel-aarch64-fedora.config
index 8e9ea0e63..d32f533f1 100644
--- a/kernel-aarch64-fedora.config
+++ b/kernel-aarch64-fedora.config
@@ -189,7 +189,6 @@ CONFIG_AK8975=m
CONFIG_AL_FIC=y
CONFIG_ALIM1535_WDT=m
CONFIG_ALIM7101_WDT=m
-CONFIG_ALLOW_LOCKDOWN_LIFT_BY_SYSRQ=y
# CONFIG_ALTERA_FREEZE_BRIDGE is not set
# CONFIG_ALTERA_MBOX is not set
CONFIG_ALTERA_MSGDMA=m
diff --git a/kernel-armv7hl-debug-fedora.config b/kernel-armv7hl-debug-fedora.config
index c798bbdac..77af91c04 100644
--- a/kernel-armv7hl-debug-fedora.config
+++ b/kernel-armv7hl-debug-fedora.config
@@ -162,7 +162,6 @@ CONFIG_AK8975=m
# CONFIG_AL_FIC is not set
CONFIG_ALIM1535_WDT=m
CONFIG_ALIM7101_WDT=m
-CONFIG_ALLOW_LOCKDOWN_LIFT_BY_SYSRQ=y
# CONFIG_ALTERA_FREEZE_BRIDGE is not set
# CONFIG_ALTERA_MBOX is not set
CONFIG_ALTERA_MSGDMA=m
diff --git a/kernel-armv7hl-fedora.config b/kernel-armv7hl-fedora.config
index dd706a8a2..05ed01c25 100644
--- a/kernel-armv7hl-fedora.config
+++ b/kernel-armv7hl-fedora.config
@@ -162,7 +162,6 @@ CONFIG_AK8975=m
# CONFIG_AL_FIC is not set
CONFIG_ALIM1535_WDT=m
CONFIG_ALIM7101_WDT=m
-CONFIG_ALLOW_LOCKDOWN_LIFT_BY_SYSRQ=y
# CONFIG_ALTERA_FREEZE_BRIDGE is not set
# CONFIG_ALTERA_MBOX is not set
CONFIG_ALTERA_MSGDMA=m
diff --git a/kernel-armv7hl-lpae-debug-fedora.config b/kernel-armv7hl-lpae-debug-fedora.config
index db99d5c6e..b4845b721 100644
--- a/kernel-armv7hl-lpae-debug-fedora.config
+++ b/kernel-armv7hl-lpae-debug-fedora.config
@@ -161,7 +161,6 @@ CONFIG_AK8975=m
# CONFIG_AL_FIC is not set
CONFIG_ALIM1535_WDT=m
CONFIG_ALIM7101_WDT=m
-CONFIG_ALLOW_LOCKDOWN_LIFT_BY_SYSRQ=y
# CONFIG_ALTERA_FREEZE_BRIDGE is not set
# CONFIG_ALTERA_MBOX is not set
CONFIG_ALTERA_MSGDMA=m
diff --git a/kernel-armv7hl-lpae-fedora.config b/kernel-armv7hl-lpae-fedora.config
index 0fdf8bf61..7691f2bb5 100644
--- a/kernel-armv7hl-lpae-fedora.config
+++ b/kernel-armv7hl-lpae-fedora.config
@@ -161,7 +161,6 @@ CONFIG_AK8975=m
# CONFIG_AL_FIC is not set
CONFIG_ALIM1535_WDT=m
CONFIG_ALIM7101_WDT=m
-CONFIG_ALLOW_LOCKDOWN_LIFT_BY_SYSRQ=y
# CONFIG_ALTERA_FREEZE_BRIDGE is not set
# CONFIG_ALTERA_MBOX is not set
CONFIG_ALTERA_MSGDMA=m
diff --git a/kernel-i686-debug-fedora.config b/kernel-i686-debug-fedora.config
index bbd6bdd52..a92494059 100644
--- a/kernel-i686-debug-fedora.config
+++ b/kernel-i686-debug-fedora.config
@@ -203,7 +203,6 @@ CONFIG_ALIENWARE_WMI=m
CONFIG_ALIM1535_WDT=m
CONFIG_ALIM7101_WDT=m
# CONFIG_ALIX is not set
-CONFIG_ALLOW_LOCKDOWN_LIFT_BY_SYSRQ=y
# CONFIG_ALTERA_FREEZE_BRIDGE is not set
# CONFIG_ALTERA_MBOX is not set
CONFIG_ALTERA_MSGDMA=m
diff --git a/kernel-i686-fedora.config b/kernel-i686-fedora.config
index b92dacce3..2de59634a 100644
--- a/kernel-i686-fedora.config
+++ b/kernel-i686-fedora.config
@@ -203,7 +203,6 @@ CONFIG_ALIENWARE_WMI=m
CONFIG_ALIM1535_WDT=m
CONFIG_ALIM7101_WDT=m
# CONFIG_ALIX is not set
-CONFIG_ALLOW_LOCKDOWN_LIFT_BY_SYSRQ=y
# CONFIG_ALTERA_FREEZE_BRIDGE is not set
# CONFIG_ALTERA_MBOX is not set
CONFIG_ALTERA_MSGDMA=m
diff --git a/kernel-ppc64le-debug-fedora.config b/kernel-ppc64le-debug-fedora.config
index 0df678a15..bf0ad36ab 100644
--- a/kernel-ppc64le-debug-fedora.config
+++ b/kernel-ppc64le-debug-fedora.config
@@ -155,7 +155,6 @@ CONFIG_AIX_PARTITION=y
# CONFIG_AL_FIC is not set
CONFIG_ALIM1535_WDT=m
CONFIG_ALIM7101_WDT=m
-CONFIG_ALLOW_LOCKDOWN_LIFT_BY_SYSRQ=y
# CONFIG_ALTERA_FREEZE_BRIDGE is not set
# CONFIG_ALTERA_MBOX is not set
CONFIG_ALTERA_MSGDMA=m
diff --git a/kernel-ppc64le-fedora.config b/kernel-ppc64le-fedora.config
index d3aab114f..bfc67d8b0 100644
--- a/kernel-ppc64le-fedora.config
+++ b/kernel-ppc64le-fedora.config
@@ -155,7 +155,6 @@ CONFIG_AIX_PARTITION=y
# CONFIG_AL_FIC is not set
CONFIG_ALIM1535_WDT=m
CONFIG_ALIM7101_WDT=m
-CONFIG_ALLOW_LOCKDOWN_LIFT_BY_SYSRQ=y
# CONFIG_ALTERA_FREEZE_BRIDGE is not set
# CONFIG_ALTERA_MBOX is not set
CONFIG_ALTERA_MSGDMA=m
diff --git a/kernel-s390x-debug-fedora.config b/kernel-s390x-debug-fedora.config
index dd488d1c2..b25623d26 100644
--- a/kernel-s390x-debug-fedora.config
+++ b/kernel-s390x-debug-fedora.config
@@ -155,7 +155,6 @@ CONFIG_AIX_PARTITION=y
# CONFIG_AL_FIC is not set
CONFIG_ALIM1535_WDT=m
# CONFIG_ALIM7101_WDT is not set
-CONFIG_ALLOW_LOCKDOWN_LIFT_BY_SYSRQ=y
# CONFIG_ALTERA_FREEZE_BRIDGE is not set
# CONFIG_ALTERA_MBOX is not set
CONFIG_ALTERA_MSGDMA=m
diff --git a/kernel-s390x-fedora.config b/kernel-s390x-fedora.config
index 6808dd74e..c2f3a351a 100644
--- a/kernel-s390x-fedora.config
+++ b/kernel-s390x-fedora.config
@@ -155,7 +155,6 @@ CONFIG_AIX_PARTITION=y
# CONFIG_AL_FIC is not set
CONFIG_ALIM1535_WDT=m
# CONFIG_ALIM7101_WDT is not set
-CONFIG_ALLOW_LOCKDOWN_LIFT_BY_SYSRQ=y
# CONFIG_ALTERA_FREEZE_BRIDGE is not set
# CONFIG_ALTERA_MBOX is not set
CONFIG_ALTERA_MSGDMA=m
diff --git a/kernel-x86_64-debug-fedora.config b/kernel-x86_64-debug-fedora.config
index 9e80ae13a..44f4914b6 100644
--- a/kernel-x86_64-debug-fedora.config
+++ b/kernel-x86_64-debug-fedora.config
@@ -206,7 +206,6 @@ CONFIG_AK8975=m
CONFIG_ALIENWARE_WMI=m
CONFIG_ALIM1535_WDT=m
CONFIG_ALIM7101_WDT=m
-CONFIG_ALLOW_LOCKDOWN_LIFT_BY_SYSRQ=y
# CONFIG_ALTERA_FREEZE_BRIDGE is not set
# CONFIG_ALTERA_MBOX is not set
CONFIG_ALTERA_MSGDMA=m
diff --git a/kernel-x86_64-fedora.config b/kernel-x86_64-fedora.config
index 0b6eee9b0..94b2c45ed 100644
--- a/kernel-x86_64-fedora.config
+++ b/kernel-x86_64-fedora.config
@@ -206,7 +206,6 @@ CONFIG_AK8975=m
CONFIG_ALIENWARE_WMI=m
CONFIG_ALIM1535_WDT=m
CONFIG_ALIM7101_WDT=m
-CONFIG_ALLOW_LOCKDOWN_LIFT_BY_SYSRQ=y
# CONFIG_ALTERA_FREEZE_BRIDGE is not set
# CONFIG_ALTERA_MBOX is not set
CONFIG_ALTERA_MSGDMA=m
diff --git a/kernel.spec b/kernel.spec
index 70e4ded46..88158393c 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -803,8 +803,6 @@ Patch202: 0003-Make-get_cert_list-use-efi_status_to_str-to-print-er.patch
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
@@ -2889,6 +2887,9 @@ fi
#
#
%changelog
+* Mon Feb 10 2020 Jeremy Cline <jcline@redhat.com>
+- Remove sysrq support to lift lockdown (rhbz 1800859)
+
* Mon Feb 10 2020 Jeremy Cline <jcline@redhat.com> - 5.6.0-0.rc1.git0.1
- Linux v5.6-rc1
diff --git a/lift-lockdown-sysrq.patch b/lift-lockdown-sysrq.patch
deleted file mode 100644
index b465143fb..000000000
--- a/lift-lockdown-sysrq.patch
+++ /dev/null
@@ -1,287 +0,0 @@
-From c2eb371cede78df9a47bf3a125aa9a45dd833da7 Mon Sep 17 00:00:00 2001
-From: Kyle McMartin <kyle@redhat.com>
-Date: Mon, 9 Apr 2018 09:52:45 +0100
-Subject: [PATCH] Add a SysRq option to lift kernel lockdown
-
-Make an option to provide a sysrq key that will lift the kernel lockdown,
-thereby allowing the running kernel image to be accessed and modified.
-
-On x86 this is triggered with SysRq+x, but this key may not be available on
-all arches, so it is set by setting LOCKDOWN_LIFT_KEY in asm/setup.h.
-Since this macro must be defined in an arch to be able to use this facility
-for that arch, the Kconfig option is restricted to arches that support it.
-
-Signed-off-by: Kyle McMartin <kyle@redhat.com>
-Signed-off-by: David Howells <dhowells@redhat.com>
-cc: x86@kernel.org
-Signed-off-by: Jeremy Cline <jcline@redhat.com>
----
- arch/x86/include/asm/setup.h | 2 ++
- drivers/input/misc/uinput.c | 1 +
- drivers/tty/sysrq.c | 27 +++++++++++++---------
- include/linux/input.h | 5 +++++
- include/linux/sysrq.h | 8 ++++++-
- kernel/debug/kdb/kdb_main.c | 2 +-
- security/lockdown/Kconfig | 11 +++++++++
- security/lockdown/lockdown.c | 43 ++++++++++++++++++++++++++++++++++++
- 8 files changed, 87 insertions(+), 12 deletions(-)
-
-diff --git a/arch/x86/include/asm/setup.h b/arch/x86/include/asm/setup.h
-index ed8ec011a9fd..8daf633a5347 100644
---- a/arch/x86/include/asm/setup.h
-+++ b/arch/x86/include/asm/setup.h
-@@ -9,6 +9,8 @@
- #include <linux/linkage.h>
- #include <asm/page_types.h>
-
-+#define LOCKDOWN_LIFT_KEY 'x'
-+
- #ifdef __i386__
-
- #include <linux/pfn.h>
-diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c
-index 84051f20b18a..583ab2bc1916 100644
---- a/drivers/input/misc/uinput.c
-+++ b/drivers/input/misc/uinput.c
-@@ -353,6 +353,7 @@ static int uinput_create_device(struct uinput_device *udev)
- dev->flush = uinput_dev_flush;
- }
-
-+ dev->flags |= INPUTDEV_FLAGS_SYNTHETIC;
- dev->event = uinput_dev_event;
-
- input_set_drvdata(udev->dev, udev);
-diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c
-index 573b2055173c..99082faafc44 100644
---- a/drivers/tty/sysrq.c
-+++ b/drivers/tty/sysrq.c
-@@ -480,6 +480,7 @@ static struct sysrq_key_op *sysrq_key_table[36] = {
- /* x: May be registered on mips for TLB dump */
- /* x: May be registered on ppc/powerpc for xmon */
- /* x: May be registered on sparc64 for global PMU dump */
-+ /* x: May be registered on x86_64 for disabling secure boot */
- NULL, /* x */
- /* y: May be registered on sparc64 for global register dump */
- NULL, /* y */
-@@ -523,7 +524,7 @@ static void __sysrq_put_key_op(int key, struct sysrq_key_op *op_p)
- sysrq_key_table[i] = op_p;
- }
-
--void __handle_sysrq(int key, bool check_mask)
-+void __handle_sysrq(int key, unsigned int from)
- {
- struct sysrq_key_op *op_p;
- int orig_log_level;
-@@ -546,11 +547,15 @@ void __handle_sysrq(int key, bool check_mask)
-
- op_p = __sysrq_get_key_op(key);
- if (op_p) {
-- /*
-- * Should we check for enabled operations (/proc/sysrq-trigger
-- * should not) and is the invoked operation enabled?
-- */
-- if (!check_mask || sysrq_on_mask(op_p->enable_mask)) {
-+ /* Ban synthetic events from some sysrq functionality */
-+ if ((from == SYSRQ_FROM_PROC || from == SYSRQ_FROM_SYNTHETIC) &&
-+ op_p->enable_mask & SYSRQ_DISABLE_USERSPACE) {
-+ printk("This sysrq operation is disabled from userspace.\n");
-+ } else if (from == SYSRQ_FROM_KERNEL || sysrq_on_mask(op_p->enable_mask)) {
-+ /*
-+ * Should we check for enabled operations (/proc/sysrq-trigger
-+ * should not) and is the invoked operation enabled?
-+ */
- pr_info("%s\n", op_p->action_msg);
- console_loglevel = orig_log_level;
- op_p->handler(key);
-@@ -585,7 +590,7 @@ void __handle_sysrq(int key, bool check_mask)
- void handle_sysrq(int key)
- {
- if (sysrq_on())
-- __handle_sysrq(key, true);
-+ __handle_sysrq(key, SYSRQ_FROM_KERNEL);
- }
- EXPORT_SYMBOL(handle_sysrq);
-
-@@ -665,7 +670,7 @@ static void sysrq_do_reset(struct timer_list *t)
- static void sysrq_handle_reset_request(struct sysrq_state *state)
- {
- if (state->reset_requested)
-- __handle_sysrq(sysrq_xlate[KEY_B], false);
-+ __handle_sysrq(sysrq_xlate[KEY_B], SYSRQ_FROM_KERNEL);
-
- if (sysrq_reset_downtime_ms)
- mod_timer(&state->keyreset_timer,
-@@ -818,8 +823,10 @@ static bool sysrq_handle_keypress(struct sysrq_state *sysrq,
-
- default:
- if (sysrq->active && value && value != 2) {
-+ int from = sysrq->handle.dev->flags & INPUTDEV_FLAGS_SYNTHETIC ?
-+ SYSRQ_FROM_SYNTHETIC : 0;
- sysrq->need_reinject = false;
-- __handle_sysrq(sysrq_xlate[code], true);
-+ __handle_sysrq(sysrq_xlate[code], from);
- }
- break;
- }
-@@ -1102,7 +1109,7 @@ static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
-
- if (get_user(c, buf))
- return -EFAULT;
-- __handle_sysrq(c, false);
-+ __handle_sysrq(c, SYSRQ_FROM_PROC);
- }
-
- return count;
-diff --git a/include/linux/input.h b/include/linux/input.h
-index 94f277cd806a..8539afa2c001 100644
---- a/include/linux/input.h
-+++ b/include/linux/input.h
-@@ -48,6 +48,7 @@ enum input_clock_type {
- * @phys: physical path to the device in the system hierarchy
- * @uniq: unique identification code for the device (if device has it)
- * @id: id of the device (struct input_id)
-+ * @flags: input device flags (SYNTHETIC, etc.)
- * @propbit: bitmap of device properties and quirks
- * @evbit: bitmap of types of events supported by the device (EV_KEY,
- * EV_REL, etc.)
-@@ -134,6 +135,8 @@ struct input_dev {
- const char *uniq;
- struct input_id id;
-
-+ unsigned int flags;
-+
- unsigned long propbit[BITS_TO_LONGS(INPUT_PROP_CNT)];
-
- unsigned long evbit[BITS_TO_LONGS(EV_CNT)];
-@@ -204,6 +207,8 @@ struct input_dev {
- };
- #define to_input_dev(d) container_of(d, struct input_dev, dev)
-
-+#define INPUTDEV_FLAGS_SYNTHETIC 0x000000001
-+
- /*
- * Verify that we are in sync with input_device_id mod_devicetable.h #defines
- */
-diff --git a/include/linux/sysrq.h b/include/linux/sysrq.h
-index 8c71874e8485..7de1f08b60a9 100644
---- a/include/linux/sysrq.h
-+++ b/include/linux/sysrq.h
-@@ -29,6 +29,8 @@
- #define SYSRQ_ENABLE_BOOT 0x0080
- #define SYSRQ_ENABLE_RTNICE 0x0100
-
-+#define SYSRQ_DISABLE_USERSPACE 0x00010000
-+
- struct sysrq_key_op {
- void (*handler)(int);
- char *help_msg;
-@@ -43,8 +45,12 @@ struct sysrq_key_op {
- * are available -- else NULL's).
- */
-
-+#define SYSRQ_FROM_KERNEL 0x0001
-+#define SYSRQ_FROM_PROC 0x0002
-+#define SYSRQ_FROM_SYNTHETIC 0x0004
-+
- void handle_sysrq(int key);
--void __handle_sysrq(int key, bool check_mask);
-+void __handle_sysrq(int key, unsigned int from);
- int register_sysrq_key(int key, struct sysrq_key_op *op);
- int unregister_sysrq_key(int key, struct sysrq_key_op *op);
- struct sysrq_key_op *__sysrq_get_key_op(int key);
-diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c
-index 4567fe998c30..d05142ef44c4 100644
---- a/kernel/debug/kdb/kdb_main.c
-+++ b/kernel/debug/kdb/kdb_main.c
-@@ -1981,7 +1981,7 @@ static int kdb_sr(int argc, const char **argv)
- return KDB_ARGCOUNT;
-
- kdb_trap_printk++;
-- __handle_sysrq(*argv[1], check_mask);
-+ __handle_sysrq(*argv[1], check_mask ? SYSRQ_FROM_KERNEL : 0);
- kdb_trap_printk--;
-
- return 0;
-diff --git a/security/lockdown/Kconfig b/security/lockdown/Kconfig
-index e84ddf484010..20e979178e1c 100644
---- a/security/lockdown/Kconfig
-+++ b/security/lockdown/Kconfig
-@@ -45,3 +45,14 @@ config LOCK_DOWN_KERNEL_FORCE_CONFIDENTIALITY
- disabled.
-
- endchoice
-+
-+config ALLOW_LOCKDOWN_LIFT_BY_SYSRQ
-+ bool "Allow the kernel lockdown to be lifted by SysRq"
-+ depends on SECURITY_LOCKDOWN_LSM
-+ depends on !LOCK_DOWN_KERNEL_FORCE_CONFIDENTIALITY
-+ depends on !LOCK_DOWN_KERNEL_FORCE_INTEGRITY
-+ depends on MAGIC_SYSRQ
-+ depends on X86
-+ help
-+ Allow setting the lockdown mode to "none" by pressing a SysRq key
-+ combination on a wired keyboard. On x86, this is SysRq+x
-diff --git a/security/lockdown/lockdown.c b/security/lockdown/lockdown.c
-index 8a10b43daf74..df4662257309 100644
---- a/security/lockdown/lockdown.c
-+++ b/security/lockdown/lockdown.c
-@@ -13,6 +13,8 @@
- #include <linux/security.h>
- #include <linux/export.h>
- #include <linux/lsm_hooks.h>
-+#include <linux/sysrq.h>
-+#include <asm/setup.h>
-
- static enum lockdown_reason kernel_locked_down;
-
-@@ -179,6 +181,47 @@ static int __init lockdown_secfs_init(void)
- return PTR_ERR_OR_ZERO(dentry);
- }
-
-+#ifdef CONFIG_ALLOW_LOCKDOWN_LIFT_BY_SYSRQ
-+
-+/*
-+ * Take the kernel out of lockdown mode.
-+ */
-+static void lift_kernel_lockdown(void)
-+{
-+ pr_notice("Lifting lockdown\n");
-+ kernel_locked_down = LOCKDOWN_NONE;
-+}
-+
-+/*
-+ * Allow lockdown to be lifted by pressing something like SysRq+x (and not by
-+ * echoing the appropriate letter into the sysrq-trigger file).
-+ */
-+static void sysrq_handle_lockdown_lift(int key)
-+{
-+ if (kernel_locked_down)
-+ lift_kernel_lockdown();
-+}
-+
-+static struct sysrq_key_op lockdown_lift_sysrq_op = {
-+ .handler = sysrq_handle_lockdown_lift,
-+ .help_msg = "unSB(x)",
-+ .action_msg = "Disabling Secure Boot restrictions",
-+ .enable_mask = SYSRQ_DISABLE_USERSPACE,
-+};
-+
-+static int __init lockdown_lift_sysrq(void)
-+{
-+ if (kernel_locked_down) {
-+ lockdown_lift_sysrq_op.help_msg[5] = LOCKDOWN_LIFT_KEY;
-+ register_sysrq_key(LOCKDOWN_LIFT_KEY, &lockdown_lift_sysrq_op);
-+ }
-+ return 0;
-+}
-+
-+late_initcall(lockdown_lift_sysrq);
-+
-+#endif /* CONFIG_ALLOW_LOCKDOWN_LIFT_BY_SYSRQ */
-+
- core_initcall(lockdown_secfs_init);
-
- #ifdef CONFIG_SECURITY_LOCKDOWN_LSM_EARLY
---
-2.21.0
-
generated by cgit (git 2.34.1) at 2024-11-11 21:00:32 +0000