| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | # SPDX-License-Identifier: GPL-2.0-only |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | config SECURITY_SELINUX |
| 3 | bool "NSA SELinux Support" |
| 4 | depends on SECURITY_NETWORK && AUDIT && NET && INET |
| 5 | select NETWORK_SECMARK |
| 6 | default n |
| 7 | help |
| 8 | This selects NSA Security-Enhanced Linux (SELinux). |
| 9 | You will also need a policy configuration and a labeled filesystem. |
| 10 | If you are unsure how to answer this question, answer N. |
| 11 | |
| 12 | config SECURITY_SELINUX_BOOTPARAM |
| 13 | bool "NSA SELinux boot parameter" |
| 14 | depends on SECURITY_SELINUX |
| 15 | default n |
| 16 | help |
| 17 | This option adds a kernel parameter 'selinux', which allows SELinux |
| 18 | to be disabled at boot. If this option is selected, SELinux |
| 19 | functionality can be disabled with selinux=0 on the kernel |
| 20 | command line. The purpose of this option is to allow a single |
| 21 | kernel image to be distributed with SELinux built in, but not |
| 22 | necessarily enabled. |
| 23 | |
| 24 | If you are unsure how to answer this question, answer N. |
| 25 | |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 26 | config SECURITY_SELINUX_DISABLE |
| 27 | bool "NSA SELinux runtime disable" |
| 28 | depends on SECURITY_SELINUX |
| 29 | select SECURITY_WRITABLE_HOOKS |
| 30 | default n |
| 31 | help |
| 32 | This option enables writing to a selinuxfs node 'disable', which |
| 33 | allows SELinux to be disabled at runtime prior to the policy load. |
| 34 | SELinux will then remain disabled until the next boot. |
| 35 | This option is similar to the selinux=0 boot parameter, but is to |
| 36 | support runtime disabling of SELinux, e.g. from /sbin/init, for |
| 37 | portability across platforms where boot parameters are difficult |
| 38 | to employ. |
| 39 | |
| 40 | NOTE: selecting this option will disable the '__ro_after_init' |
| 41 | kernel hardening feature for security hooks. Please consider |
| 42 | using the selinux=0 boot parameter instead of enabling this |
| 43 | option. |
| 44 | |
| 45 | If you are unsure how to answer this question, answer N. |
| 46 | |
| 47 | config SECURITY_SELINUX_DEVELOP |
| 48 | bool "NSA SELinux Development Support" |
| 49 | depends on SECURITY_SELINUX |
| 50 | default y |
| 51 | help |
| 52 | This enables the development support option of NSA SELinux, |
| 53 | which is useful for experimenting with SELinux and developing |
| 54 | policies. If unsure, say Y. With this option enabled, the |
| 55 | kernel will start in permissive mode (log everything, deny nothing) |
| 56 | unless you specify enforcing=1 on the kernel command line. You |
| 57 | can interactively toggle the kernel between enforcing mode and |
| 58 | permissive mode (if permitted by the policy) via /selinux/enforce. |
| 59 | |
| 60 | config SECURITY_SELINUX_AVC_STATS |
| 61 | bool "NSA SELinux AVC Statistics" |
| 62 | depends on SECURITY_SELINUX |
| 63 | default y |
| 64 | help |
| 65 | This option collects access vector cache statistics to |
| 66 | /selinux/avc/cache_stats, which may be monitored via |
| 67 | tools such as avcstat. |
| 68 | |
| 69 | config SECURITY_SELINUX_CHECKREQPROT_VALUE |
| 70 | int "NSA SELinux checkreqprot default value" |
| 71 | depends on SECURITY_SELINUX |
| 72 | range 0 1 |
| 73 | default 0 |
| 74 | help |
| 75 | This option sets the default value for the 'checkreqprot' flag |
| 76 | that determines whether SELinux checks the protection requested |
| 77 | by the application or the protection that will be applied by the |
| 78 | kernel (including any implied execute for read-implies-exec) for |
| 79 | mmap and mprotect calls. If this option is set to 0 (zero), |
| 80 | SELinux will default to checking the protection that will be applied |
| 81 | by the kernel. If this option is set to 1 (one), SELinux will |
| 82 | default to checking the protection requested by the application. |
| 83 | The checkreqprot flag may be changed from the default via the |
| 84 | 'checkreqprot=' boot parameter. It may also be changed at runtime |
| 85 | via /selinux/checkreqprot if authorized by policy. |
| 86 | |
| 87 | If you are unsure how to answer this question, answer 0. |