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2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc 
 kernel/security/Kconfig
....@@ -1,10 +1,11 @@
1
+# SPDX-License-Identifier: GPL-2.0-only
12 #
23 # Security configuration
34 #
45 
56 menu "Security options"
67 
7
-source security/keys/Kconfig
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+source "security/keys/Kconfig"
89 
910 config SECURITY_DMESG_RESTRICT
1011 	bool "Restrict unprivileged access to the kernel syslog"
....@@ -17,15 +18,6 @@
1718 	  unless the dmesg_restrict sysctl is explicitly set to (1).
1819 
1920 	  If you are unsure how to answer this question, answer N.
20
-
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-config SECURITY_PERF_EVENTS_RESTRICT
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-	bool "Restrict unprivileged use of performance events"
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-	depends on PERF_EVENTS
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-	help
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-	  If you say Y here, the kernel.perf_event_paranoid sysctl
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-	  will be set to 3 by default, and no unprivileged use of the
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-	  perf_event_open syscall will be permitted unless it is
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-	  changed.
2921 
3022 config SECURITY
3123 	bool "Enable different security models"
....@@ -49,8 +41,7 @@
4941 	bool "Enable the securityfs filesystem"
5042 	help
5143 	  This will build the securityfs filesystem.  It is currently used by
52
-	  the TPM bios character driver and IMA, an integrity provider.  It is
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-	  not used by SELinux or SMACK.
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+	  various security modules (AppArmor, IMA, SafeSetID, TOMOYO, TPM).
5445 
5546 	  If you are unsure how to answer this question, answer N.
5647 
....@@ -62,17 +53,6 @@
6253 	  If enabled, a security module can use these hooks to
6354 	  implement socket and networking access controls.
6455 	  If you are unsure how to answer this question, answer N.
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-
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-config PAGE_TABLE_ISOLATION
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-	bool "Remove the kernel mapping in user mode"
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-	default y
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-	depends on (X86_64 || X86_PAE) && !UML
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-	help
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-	  This feature reduces the number of hardware side channels by
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-	  ensuring that the majority of kernel addresses are not mapped
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-	  into userspace.
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-
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-	  See Documentation/x86/pti.txt for more details.
7656 
7757 config SECURITY_INFINIBAND
7858 	bool "Infiniband Security Hooks"
....@@ -127,10 +107,10 @@
127107 	  it was configured with, especially since they may be responsible for
128108 	  providing such assurances to VMs and services running on it.
129109 
130
-	  See <http://www.intel.com/technology/security/> for more information
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+	  See <https://www.intel.com/technology/security/> for more information
131111 	  about Intel(R) TXT.
132112 	  See <http://tboot.sourceforge.net> for more information about tboot.
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-	  See Documentation/intel_txt.txt for a description of how to enable
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+	  See Documentation/x86/intel_txt.rst for a description of how to enable
134114 	  Intel TXT support in a kernel boot.
135115 
136116 	  If you are unsure as to whether this is required, answer N.
....@@ -242,18 +222,19 @@
242222 	  If you wish for all usermode helper programs to be disabled,
243223 	  specify an empty string here (i.e. "").
244224 
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-source security/selinux/Kconfig
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-source security/smack/Kconfig
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-source security/tomoyo/Kconfig
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-source security/apparmor/Kconfig
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-source security/loadpin/Kconfig
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-source security/yama/Kconfig
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-source security/optee_linuxdriver/Kconfig
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+source "security/selinux/Kconfig"
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+source "security/smack/Kconfig"
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+source "security/tomoyo/Kconfig"
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+source "security/apparmor/Kconfig"
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+source "security/loadpin/Kconfig"
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+source "security/yama/Kconfig"
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+source "security/safesetid/Kconfig"
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+source "security/lockdown/Kconfig"
252233 
253
-source security/integrity/Kconfig
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+source "security/integrity/Kconfig"
254235 
255236 choice
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-	prompt "Default security module"
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+	prompt "First legacy 'major LSM' to be initialized"
257238 	default DEFAULT_SECURITY_SELINUX if SECURITY_SELINUX
258239 	default DEFAULT_SECURITY_SMACK if SECURITY_SMACK
259240 	default DEFAULT_SECURITY_TOMOYO if SECURITY_TOMOYO
....@@ -261,8 +242,13 @@
261242 	default DEFAULT_SECURITY_DAC
262243 
263244 	help
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-	  Select the security module that will be used by default if the
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-	  kernel parameter security= is not specified.
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+	  This choice is there only for converting CONFIG_DEFAULT_SECURITY
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+	  in old kernel configs to CONFIG_LSM in new kernel configs. Don't
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+	  change this choice unless you are creating a fresh kernel config,
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+	  for this choice will be ignored after CONFIG_LSM has been set.
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+
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+	  Selects the legacy "major security module" that will be
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+	  initialized first. Overridden by non-default CONFIG_LSM.
266252 
267253 	config DEFAULT_SECURITY_SELINUX
268254 		bool "SELinux" if SECURITY_SELINUX=y
....@@ -281,13 +267,19 @@
281267 
282268 endchoice
283269 
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-config DEFAULT_SECURITY
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-	string
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-	default "selinux" if DEFAULT_SECURITY_SELINUX
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-	default "smack" if DEFAULT_SECURITY_SMACK
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-	default "tomoyo" if DEFAULT_SECURITY_TOMOYO
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-	default "apparmor" if DEFAULT_SECURITY_APPARMOR
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-	default "" if DEFAULT_SECURITY_DAC
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+config LSM
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+	string "Ordered list of enabled LSMs"
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+	default "lockdown,yama,loadpin,safesetid,integrity,smack,selinux,tomoyo,apparmor,bpf" if DEFAULT_SECURITY_SMACK
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+	default "lockdown,yama,loadpin,safesetid,integrity,apparmor,selinux,smack,tomoyo,bpf" if DEFAULT_SECURITY_APPARMOR
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+	default "lockdown,yama,loadpin,safesetid,integrity,tomoyo,bpf" if DEFAULT_SECURITY_TOMOYO
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+	default "lockdown,yama,loadpin,safesetid,integrity,bpf" if DEFAULT_SECURITY_DAC
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+	default "lockdown,yama,loadpin,safesetid,integrity,selinux,smack,tomoyo,apparmor,bpf"
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+	help
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+	  A comma-separated list of LSMs, in initialization order.
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+	  Any LSMs left off this list will be ignored. This can be
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+	  controlled at boot with the "lsm=" parameter.
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+
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+	  If unsure, leave this as the default.
291283 
292284 source "security/Kconfig.hardening"
293285