| # |
| # Security configuration |
| # |
| |
| menu "Security options" |
| |
| source security/keys/Kconfig |
| |
| config SECURITY_DMESG_RESTRICT |
| bool "Restrict unprivileged access to the kernel syslog" |
| default n |
| help |
| This enforces restrictions on unprivileged users reading the kernel |
| syslog via dmesg(8). |
| |
| If this option is not selected, no restrictions will be enforced |
| unless the dmesg_restrict sysctl is explicitly set to (1). |
| |
| If you are unsure how to answer this question, answer N. |
| |
| config SECURITY_PERF_EVENTS_RESTRICT |
| bool "Restrict unprivileged use of performance events" |
| depends on PERF_EVENTS |
| help |
| If you say Y here, the kernel.perf_event_paranoid sysctl |
| will be set to 3 by default, and no unprivileged use of the |
| perf_event_open syscall will be permitted unless it is |
| changed. |
| |
| config SECURITY |
| bool "Enable different security models" |
| depends on SYSFS |
| depends on MULTIUSER |
| help |
| This allows you to choose different security modules to be |
| configured into your kernel. |
| |
| If this option is not selected, the default Linux security |
| model will be used. |
| |
| If you are unsure how to answer this question, answer N. |
| |
| config PAGE_TABLE_ISOLATION |
| bool "Remove the kernel mapping in user mode" |
| default y |
| depends on X86_64 && SMP |
| help |
| This enforces a strict kernel and user space isolation, in order |
| to close hardware side channels on kernel address information. |
| |
| If you are unsure how to answer this question, answer Y. |
| |
| config SECURITYFS |
| bool "Enable the securityfs filesystem" |
| help |
| This will build the securityfs filesystem. It is currently used by |
| the TPM bios character driver and IMA, an integrity provider. It is |
| not used by SELinux or SMACK. |
| |
| If you are unsure how to answer this question, answer N. |
| |
| config SECURITY_NETWORK |
| bool "Socket and Networking Security Hooks" |
| depends on SECURITY |
| help |
| This enables the socket and networking security hooks. |
| If enabled, a security module can use these hooks to |
| implement socket and networking access controls. |
| If you are unsure how to answer this question, answer N. |
| |
| config SECURITY_NETWORK_XFRM |
| bool "XFRM (IPSec) Networking Security Hooks" |
| depends on XFRM && SECURITY_NETWORK |
| help |
| This enables the XFRM (IPSec) networking security hooks. |
| If enabled, a security module can use these hooks to |
| implement per-packet access controls based on labels |
| derived from IPSec policy. Non-IPSec communications are |
| designated as unlabelled, and only sockets authorized |
| to communicate unlabelled data can send without using |
| IPSec. |
| If you are unsure how to answer this question, answer N. |
| |
| config SECURITY_PATH |
| bool "Security hooks for pathname based access control" |
| depends on SECURITY |
| help |
| This enables the security hooks for pathname based access control. |
| If enabled, a security module can use these hooks to |
| implement pathname based access controls. |
| If you are unsure how to answer this question, answer N. |
| |
| config INTEL_TXT |
| bool "Enable Intel(R) Trusted Execution Technology (Intel(R) TXT)" |
| depends on HAVE_INTEL_TXT |
| help |
| This option enables support for booting the kernel with the |
| Trusted Boot (tboot) module. This will utilize |
| Intel(R) Trusted Execution Technology to perform a measured launch |
| of the kernel. If the system does not support Intel(R) TXT, this |
| will have no effect. |
| |
| Intel TXT will provide higher assurance of system configuration and |
| initial state as well as data reset protection. This is used to |
| create a robust initial kernel measurement and verification, which |
| helps to ensure that kernel security mechanisms are functioning |
| correctly. This level of protection requires a root of trust outside |
| of the kernel itself. |
| |
| Intel TXT also helps solve real end user concerns about having |
| confidence that their hardware is running the VMM or kernel that |
| it was configured with, especially since they may be responsible for |
| providing such assurances to VMs and services running on it. |
| |
| See <http://www.intel.com/technology/security/> for more information |
| about Intel(R) TXT. |
| See <http://tboot.sourceforge.net> for more information about tboot. |
| See Documentation/intel_txt.txt for a description of how to enable |
| Intel TXT support in a kernel boot. |
| |
| If you are unsure as to whether this is required, answer N. |
| |
| config LSM_MMAP_MIN_ADDR |
| int "Low address space for LSM to protect from user allocation" |
| depends on SECURITY && SECURITY_SELINUX |
| default 32768 if ARM || (ARM64 && COMPAT) |
| default 65536 |
| help |
| This is the portion of low virtual memory which should be protected |
| from userspace allocation. Keeping a user from writing to low pages |
| can help reduce the impact of kernel NULL pointer bugs. |
| |
| For most ia64, ppc64 and x86 users with lots of address space |
| a value of 65536 is reasonable and should cause no problems. |
| On arm and other archs it should not be higher than 32768. |
| Programs which use vm86 functionality or have some need to map |
| this low address space will need the permission specific to the |
| systems running LSM. |
| |
| config HAVE_HARDENED_USERCOPY_ALLOCATOR |
| bool |
| help |
| The heap allocator implements __check_heap_object() for |
| validating memory ranges against heap object sizes in |
| support of CONFIG_HARDENED_USERCOPY. |
| |
| config HAVE_ARCH_HARDENED_USERCOPY |
| bool |
| help |
| The architecture supports CONFIG_HARDENED_USERCOPY by |
| calling check_object_size() just before performing the |
| userspace copies in the low level implementation of |
| copy_to_user() and copy_from_user(). |
| |
| config HARDENED_USERCOPY |
| bool "Harden memory copies between kernel and userspace" |
| depends on HAVE_ARCH_HARDENED_USERCOPY |
| depends on HAVE_HARDENED_USERCOPY_ALLOCATOR |
| select BUG |
| help |
| This option checks for obviously wrong memory regions when |
| copying memory to/from the kernel (via copy_to_user() and |
| copy_from_user() functions) by rejecting memory ranges that |
| are larger than the specified heap object, span multiple |
| separately allocates pages, are not on the process stack, |
| or are part of the kernel text. This kills entire classes |
| of heap overflow exploits and similar kernel memory exposures. |
| |
| config HARDENED_USERCOPY_PAGESPAN |
| bool "Refuse to copy allocations that span multiple pages" |
| depends on HARDENED_USERCOPY |
| depends on !COMPILE_TEST |
| help |
| When a multi-page allocation is done without __GFP_COMP, |
| hardened usercopy will reject attempts to copy it. There are, |
| however, several cases of this in the kernel that have not all |
| been removed. This config is intended to be used only while |
| trying to find such users. |
| |
| source security/selinux/Kconfig |
| source security/smack/Kconfig |
| source security/tomoyo/Kconfig |
| source security/apparmor/Kconfig |
| source security/yama/Kconfig |
| source security/mstdrv/Kconfig |
| |
| source security/integrity/Kconfig |
| source security/tz_iccc/Kconfig |
| source security/samsung/five/Kconfig |
| source security/samsung/defex_lsm/Kconfig |
| source security/samsung/dsms/Kconfig |
| source security/proca/Kconfig |
| |
| choice |
| prompt "Default security module" |
| default DEFAULT_SECURITY_SELINUX if SECURITY_SELINUX |
| default DEFAULT_SECURITY_SMACK if SECURITY_SMACK |
| default DEFAULT_SECURITY_TOMOYO if SECURITY_TOMOYO |
| default DEFAULT_SECURITY_APPARMOR if SECURITY_APPARMOR |
| default DEFAULT_SECURITY_DAC |
| |
| help |
| Select the security module that will be used by default if the |
| kernel parameter security= is not specified. |
| |
| config DEFAULT_SECURITY_SELINUX |
| bool "SELinux" if SECURITY_SELINUX=y |
| |
| config DEFAULT_SECURITY_SMACK |
| bool "Simplified Mandatory Access Control" if SECURITY_SMACK=y |
| |
| config DEFAULT_SECURITY_TOMOYO |
| bool "TOMOYO" if SECURITY_TOMOYO=y |
| |
| config DEFAULT_SECURITY_APPARMOR |
| bool "AppArmor" if SECURITY_APPARMOR=y |
| |
| config DEFAULT_SECURITY_DAC |
| bool "Unix Discretionary Access Controls" |
| |
| endchoice |
| |
| config DEFAULT_SECURITY |
| string |
| default "selinux" if DEFAULT_SECURITY_SELINUX |
| default "smack" if DEFAULT_SECURITY_SMACK |
| default "tomoyo" if DEFAULT_SECURITY_TOMOYO |
| default "apparmor" if DEFAULT_SECURITY_APPARMOR |
| default "" if DEFAULT_SECURITY_DAC |
| |
| config SDP |
| bool "Enables SDP" |
| default n |
| help |
| Sensitive Data Protection |
| |
| config SDP_ENHANCED |
| bool "Enables enhanced SDP" |
| default n |
| |
| config SDP_KEY_DUMP |
| bool "SDP KEY DUMP" |
| default n |
| |
| endmenu |
| |