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