| Matthew Garrett | 000d388 | 2019-08-19 17:17:39 -0700 | [diff] [blame] | 1 | config SECURITY_LOCKDOWN_LSM |
| 2 | bool "Basic module for enforcing kernel lockdown" |
| 3 | depends on SECURITY |
| David Howells | 49fcf73 | 2019-08-19 17:17:40 -0700 | [diff] [blame] | 4 | select MODULE_SIG if MODULES |
| Matthew Garrett | 000d388 | 2019-08-19 17:17:39 -0700 | [diff] [blame] | 5 | help |
| 6 | Build support for an LSM that enforces a coarse kernel lockdown |
| 7 | behaviour. |
| 8 | |
| 9 | config SECURITY_LOCKDOWN_LSM_EARLY |
| 10 | bool "Enable lockdown LSM early in init" |
| 11 | depends on SECURITY_LOCKDOWN_LSM |
| 12 | help |
| 13 | Enable the lockdown LSM early in boot. This is necessary in order |
| 14 | to ensure that lockdown enforcement can be carried out on kernel |
| 15 | boot parameters that are otherwise parsed before the security |
| 16 | subsystem is fully initialised. If enabled, lockdown will |
| 17 | unconditionally be called before any other LSMs. |
| 18 | |
| 19 | choice |
| 20 | prompt "Kernel default lockdown mode" |
| 21 | default LOCK_DOWN_KERNEL_FORCE_NONE |
| 22 | depends on SECURITY_LOCKDOWN_LSM |
| 23 | help |
| 24 | The kernel can be configured to default to differing levels of |
| 25 | lockdown. |
| 26 | |
| 27 | config LOCK_DOWN_KERNEL_FORCE_NONE |
| 28 | bool "None" |
| 29 | help |
| 30 | No lockdown functionality is enabled by default. Lockdown may be |
| 31 | enabled via the kernel commandline or /sys/kernel/security/lockdown. |
| 32 | |
| 33 | config LOCK_DOWN_KERNEL_FORCE_INTEGRITY |
| 34 | bool "Integrity" |
| 35 | help |
| 36 | The kernel runs in integrity mode by default. Features that allow |
| 37 | the kernel to be modified at runtime are disabled. |
| 38 | |
| 39 | config LOCK_DOWN_KERNEL_FORCE_CONFIDENTIALITY |
| 40 | bool "Confidentiality" |
| 41 | help |
| 42 | The kernel runs in confidentiality mode by default. Features that |
| 43 | allow the kernel to be modified at runtime or that permit userland |
| 44 | code to read confidential material held inside the kernel are |
| 45 | disabled. |
| 46 | |
| 47 | endchoice |