### Steps to create 1. Set the KVER variable to which version you want to obtain from Anthraxx's linux-hardened repository 2. Run `bash kernel_build.sh` ### Steps to import/configure release - Built into PlagueOS installer ### Troubleshooting: - `lsinitrd -v /boot/initramfs-5.10."$KVER"-hardened1_1.img` #### Additional Resources: - https://www.kernel.org/doc/html/v5.10/ - https://github.com/Whonix/hardened-kernel - https://docs.clip-os.org/clipos/kernel.html - https://github.com/anthraxx/linux-hardened - https://kernsec.org/wiki/index.php/Kernel_Self_Protection_Project - https://notabug.org/anonymous-lestat/Void-Hardened-Kernel - https://madaidans-insecurities.github.io/guides/linux-hardening.html#kernel ### Trimming Efforts - While linux-hardened security patchsets along with kernel configurations are notable for this kernel project, the core purpose was to practice minimalism by reducing the size of the linux kernel, thereby cutting attack surface. This is not a trivial thing to record, therefore we are displaying the size purely as a point of comparison. | |PlagueOS (plague-kernel) |Whonix (LTS)| |--- | --- | ---| |Size (compressed)|159.2 MB |285.6 MB| ### Current kconfig-hardened-check results #### Successes Option | Desired Value | Source | Reason | Result | |--- | --- | --- | --- | --- | CONFIG_BUG | y |defconfig | self_protection | OK CONFIG_GCC_PLUGINS | y |defconfig | self_protection | OK CONFIG_STACKPROTECTOR_STRONG | y |defconfig | self_protection | OK CONFIG_STRICT_KERNEL_RWX | y |defconfig | self_protection | OK CONFIG_STRICT_MODULE_RWX | y |defconfig | self_protection | OK CONFIG_REFCOUNT_FULL | y |defconfig | self_protection | OK: version >= 5.5 CONFIG_IOMMU_SUPPORT | y |defconfig | self_protection | OK CONFIG_RANDOMIZE_BASE | y |defconfig | self_protection | OK CONFIG_THREAD_INFO_IN_TASK | y |defconfig | self_protection | OK CONFIG_VMAP_STACK | y |defconfig | self_protection | OK CONFIG_MICROCODE | y |defconfig | self_protection | OK CONFIG_RETPOLINE | y |defconfig | self_protection | OK CONFIG_X86_SMAP | y |defconfig | self_protection | OK CONFIG_SYN_COOKIES | y |defconfig | self_protection | OK CONFIG_PAGE_TABLE_ISOLATION | y |defconfig | self_protection | OK CONFIG_RANDOMIZE_MEMORY | y |defconfig | self_protection | OK CONFIG_INTEL_IOMMU | y |defconfig | self_protection | OK CONFIG_AMD_IOMMU | y |defconfig | self_protection | OK CONFIG_SECURITY_DMESG_RESTRICT | y | kspp | self_protection | OK CONFIG_BUG_ON_DATA_CORRUPTION | y | kspp | self_protection | OK CONFIG_DEBUG_WX | y | kspp | self_protection | OK CONFIG_SCHED_STACK_END_CHECK | y | kspp | self_protection | OK CONFIG_SLAB_FREELIST_HARDENED | y | kspp | self_protection | OK CONFIG_SLAB_FREELIST_RANDOM | y | kspp | self_protection | OK CONFIG_SHUFFLE_PAGE_ALLOCATOR | y | kspp | self_protection | OK CONFIG_FORTIFY_SOURCE | y | kspp | self_protection | OK CONFIG_DEBUG_LIST | y | kspp | self_protection | OK CONFIG_DEBUG_SG | y | kspp | self_protection | OK CONFIG_DEBUG_CREDENTIALS | y | kspp | self_protection | OK CONFIG_DEBUG_NOTIFIERS | y | kspp | self_protection | OK CONFIG_INIT_ON_ALLOC_DEFAULT_ON | y | kspp | self_protection | OK CONFIG_GCC_PLUGIN_LATENT_ENTROPY | y | kspp | self_protection | OK CONFIG_GCC_PLUGIN_RANDSTRUCT | y | kspp | self_protection | OK CONFIG_HARDENED_USERCOPY | y | kspp | self_protection | OK CONFIG_HARDENED_USERCOPY_FALLBACK | is not set | kspp | self_protection | OK CONFIG_HARDENED_USERCOPY_PAGESPAN | is not set | kspp | self_protection | OK CONFIG_MODULE_SIG | y | kspp | self_protection | OK CONFIG_MODULE_SIG_ALL | y | kspp | self_protection | OK CONFIG_MODULE_SIG_SHA512 | y | kspp | self_protection | OK CONFIG_MODULE_SIG_FORCE | y | kspp | self_protection | OK CONFIG_INIT_STACK_ALL_ZERO | y | kspp | self_protection | OK: CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL "y" CONFIG_INIT_ON_FREE_DEFAULT_ON | y | kspp | self_protection | OK CONFIG_GCC_PLUGIN_STACKLEAK | y | kspp | self_protection | OK CONFIG_DEFAULT_MMAP_MIN_ADDR | 65536 | kspp | self_protection | OK CONFIG_DEBUG_VIRTUAL | y | clipos | self_protection | OK CONFIG_EFI_DISABLE_PCI_DMA | y | clipos | self_protection | OK CONFIG_SLAB_MERGE_DEFAULT | is not set | clipos | self_protection | OK CONFIG_RANDOM_TRUST_BOOTLOADER | is not set | clipos | self_protection | OK CONFIG_RANDOM_TRUST_CPU | is not set | clipos | self_protection | OK CONFIG_GCC_PLUGIN_RANDSTRUCT_PERFORMANCE | is not set | clipos | self_protection | OK CONFIG_STACKLEAK_METRICS | is not set | clipos | self_protection | OK CONFIG_STACKLEAK_RUNTIME_DISABLE | is not set | clipos | self_protection | OK CONFIG_INTEL_IOMMU_DEFAULT_ON | y | clipos | self_protection | OK CONFIG_INTEL_IOMMU_SVM | y | clipos | self_protection | OK CONFIG_RESET_ATTACK_MITIGATION | y | my | self_protection | OK CONFIG_AMD_IOMMU_V2 | y | my | self_protection | OK CONFIG_SECURITY | y |defconfig | security_policy | OK CONFIG_SECURITY_YAMA | y | kspp | security_policy | OK CONFIG_SECURITY_WRITABLE_HOOKS | is not set | my | security_policy | OK: not found CONFIG_SECURITY_LOCKDOWN_LSM | y | clipos | security_policy | OK CONFIG_SECURITY_LOCKDOWN_LSM_EARLY | y | clipos | security_policy | OK CONFIG_LOCK_DOWN_KERNEL_FORCE_CONFIDENTIALITY| y | clipos | security_policy | OK CONFIG_SECURITY_SAFESETID | y | my | security_policy | OK CONFIG_SECCOMP | y |defconfig | cut_attack_surface | OK CONFIG_SECCOMP_FILTER | y |defconfig | cut_attack_surface | OK CONFIG_STRICT_DEVMEM | y |defconfig | cut_attack_surface | OK: CONFIG_DEVMEM "is not set" CONFIG_ACPI_CUSTOM_METHOD | is not set | kspp | cut_attack_surface | OK: not found CONFIG_COMPAT_BRK | is not set | kspp | cut_attack_surface | OK CONFIG_DEVKMEM | is not set | kspp | cut_attack_surface | OK CONFIG_COMPAT_VDSO | is not set | kspp | cut_attack_surface | OK: not found CONFIG_BINFMT_MISC | is not set | kspp | cut_attack_surface | OK CONFIG_INET_DIAG | is not set | kspp | cut_attack_surface | OK CONFIG_KEXEC | is not set | kspp | cut_attack_surface | OK CONFIG_PROC_KCORE | is not set | kspp | cut_attack_surface | OK CONFIG_LEGACY_PTYS | is not set | kspp | cut_attack_surface | OK CONFIG_HIBERNATION | is not set | kspp | cut_attack_surface | OK CONFIG_IA32_EMULATION | is not set | kspp | cut_attack_surface | OK CONFIG_X86_X32 | is not set | kspp | cut_attack_surface | OK CONFIG_MODIFY_LDT_SYSCALL | is not set | kspp | cut_attack_surface | OK CONFIG_OABI_COMPAT | is not set | kspp | cut_attack_surface | OK: not found CONFIG_DEVMEM | is not set | kspp | cut_attack_surface | OK CONFIG_IO_STRICT_DEVMEM | y | kspp | cut_attack_surface | OK: CONFIG_DEVMEM "is not set" CONFIG_LEGACY_VSYSCALL_NONE | y | kspp | cut_attack_surface | OK CONFIG_ZSMALLOC_STAT | is not set |grsecurity| cut_attack_surface | OK CONFIG_PAGE_OWNER | is not set |grsecurity| cut_attack_surface | OK CONFIG_DEBUG_KMEMLEAK | is not set |grsecurity| cut_attack_surface | OK CONFIG_BINFMT_AOUT | is not set |grsecurity| cut_attack_surface | OK: not found CONFIG_KPROBE_EVENTS | is not set |grsecurity| cut_attack_surface | OK: not found CONFIG_UPROBE_EVENTS | is not set |grsecurity| cut_attack_surface | OK: not found CONFIG_GENERIC_TRACER | is not set |grsecurity| cut_attack_surface | OK: not found CONFIG_FUNCTION_TRACER | is not set |grsecurity| cut_attack_surface | OK: not found CONFIG_STACK_TRACER | is not set |grsecurity| cut_attack_surface | OK: not found CONFIG_HIST_TRIGGERS | is not set |grsecurity| cut_attack_surface | OK: not found CONFIG_BLK_DEV_IO_TRACE | is not set |grsecurity| cut_attack_surface | OK: not found CONFIG_PROC_VMCORE | is not set |grsecurity| cut_attack_surface | OK: not found CONFIG_PROC_PAGE_MONITOR | is not set |grsecurity| cut_attack_surface | OK CONFIG_USELIB | is not set |grsecurity| cut_attack_surface | OK CONFIG_CHECKPOINT_RESTORE | is not set |grsecurity| cut_attack_surface | OK CONFIG_USERFAULTFD | is not set |grsecurity| cut_attack_surface | OK CONFIG_HWPOISON_INJECT | is not set |grsecurity| cut_attack_surface | OK CONFIG_MEM_SOFT_DIRTY | is not set |grsecurity| cut_attack_surface | OK: not found CONFIG_DEVPORT | is not set |grsecurity| cut_attack_surface | OK CONFIG_DEBUG_FS | is not set |grsecurity| cut_attack_surface | OK CONFIG_NOTIFIER_ERROR_INJECTION | is not set |grsecurity| cut_attack_surface | OK CONFIG_FAIL_FUTEX | is not set |grsecurity| cut_attack_surface | OK: not found CONFIG_PUNIT_ATOM_DEBUG | is not set |grsecurity| cut_attack_surface | OK CONFIG_ACPI_CONFIGFS | is not set |grsecurity| cut_attack_surface | OK CONFIG_EDAC_DEBUG | is not set |grsecurity| cut_attack_surface | OK CONFIG_DRM_I915_DEBUG | is not set |grsecurity| cut_attack_surface | OK CONFIG_BCACHE_CLOSURES_DEBUG | is not set |grsecurity| cut_attack_surface | OK CONFIG_DVB_C8SECTPFE | is not set |grsecurity| cut_attack_surface | OK: not found CONFIG_MTD_SLRAM | is not set |grsecurity| cut_attack_surface | OK: not found CONFIG_MTD_PHRAM | is not set |grsecurity| cut_attack_surface | OK: not found CONFIG_IO_URING | is not set |grsecurity| cut_attack_surface | OK CONFIG_RSEQ | is not set |grsecurity| cut_attack_surface | OK CONFIG_LATENCYTOP | is not set |grsecurity| cut_attack_surface | OK CONFIG_KCOV | is not set |grsecurity| cut_attack_surface | OK CONFIG_PROVIDE_OHCI1394_DMA_INIT | is not set |grsecurity| cut_attack_surface | OK CONFIG_SUNRPC_DEBUG | is not set |grsecurity| cut_attack_surface | OK: not found CONFIG_PTDUMP_DEBUGFS | is not set |grsecurity| cut_attack_surface | OK: not found CONFIG_DRM_LEGACY | is not set |maintainer| cut_attack_surface | OK CONFIG_BLK_DEV_FD | is not set |maintainer| cut_attack_surface | OK CONFIG_AIO | is not set |grapheneos| cut_attack_surface | OK CONFIG_STAGING | is not set | clipos | cut_attack_surface | OK CONFIG_KSM | is not set | clipos | cut_attack_surface | OK CONFIG_KALLSYMS | is not set | clipos | cut_attack_surface | OK CONFIG_X86_VSYSCALL_EMULATION | is not set | clipos | cut_attack_surface | OK CONFIG_KEXEC_FILE | is not set | clipos | cut_attack_surface | OK CONFIG_USER_NS | is not set | clipos | cut_attack_surface | OK CONFIG_X86_MSR | is not set | clipos | cut_attack_surface | OK CONFIG_X86_IOPL_IOPERM | is not set | clipos | cut_attack_surface | OK CONFIG_ACPI_TABLE_UPGRADE | is not set | clipos | cut_attack_surface | OK CONFIG_EFI_CUSTOM_SSDT_OVERLAYS | is not set | clipos | cut_attack_surface | OK CONFIG_LDISC_AUTOLOAD | is not set | clipos | cut_attack_surface | OK CONFIG_X86_INTEL_TSX_MODE_OFF | y | clipos | cut_attack_surface | OK CONFIG_EFI_TEST | is not set | lockdown | cut_attack_surface | OK CONFIG_MMIOTRACE_TEST | is not set | lockdown | cut_attack_surface | OK: not found CONFIG_KPROBES | is not set | lockdown | cut_attack_surface | OK CONFIG_TRIM_UNUSED_KSYMS | y | my | cut_attack_surface | OK CONFIG_MMIOTRACE | is not set | my | cut_attack_surface | OK: not found CONFIG_LIVEPATCH | is not set | my | cut_attack_surface | OK: not found CONFIG_IP_DCCP | is not set | my | cut_attack_surface | OK CONFIG_FTRACE | is not set | my | cut_attack_surface | OK CONFIG_VIDEO_VIVID | is not set | my | cut_attack_surface | OK: not found CONFIG_INPUT_EVBUG | is not set | my | cut_attack_surface | OK CONFIG_INTEGRITY | y |defconfig |userspace_hardening | OK CONFIG_ARCH_MMAP_RND_BITS | 32 | clipos |userspace_hardening | OK CONFIG_IP_SCTP | is not set | my | cut_attack_surface | OK #### Fails Option | Desired Value | Source | Reason | Result | |--- | --- | --- | --- | --- | CONFIG_SLUB_DEBUG | y |defconfig | self_protection | FAIL: "is not set" CONFIG_X86_UMIP | y |defconfig | self_protection | FAIL: "is not set" CONFIG_RANDOMIZE_KSTACK_OFFSET_DEFAULT | y | kspp | self_protection | FAIL: not found CONFIG_UBSAN_BOUNDS | y |maintainer| self_protection | FAIL: not found CONFIG_UBSAN_SANITIZE_ALL | y |maintainer| self_protection | FAIL: CONFIG_UBSAN_BOUNDS not "y" CONFIG_UBSAN_TRAP | y |maintainer| self_protection | FAIL: CONFIG_UBSAN_BOUNDS not "y" CONFIG_STATIC_USERMODEHELPER | y | clipos | self_protection | FAIL: "is not set" CONFIG_SECURITY_LOADPIN | y | my | security_policy | FAIL: "is not set" CONFIG_SECURITY_LOADPIN_ENFORCE | y | my | security_policy | FAIL: CONFIG_SECURITY_LOADPIN not "y" CONFIG_MODULES | is not set | kspp | cut_attack_surface | FAIL: "y" CONFIG_KCMP | is not set |grsecurity| cut_attack_surface | FAIL: "y" CONFIG_FB | is not set |maintainer| cut_attack_surface | FAIL: "y" CONFIG_VT | is not set |maintainer| cut_attack_surface | FAIL: "y" CONFIG_MAGIC_SYSRQ | is not set | clipos | cut_attack_surface | FAIL: "y" CONFIG_X86_CPUID | is not set | clipos | cut_attack_surface | FAIL: "m" CONFIG_BPF_SYSCALL | is not set | lockdown | cut_attack_surface | FAIL: "y" ``` Totals: 'OK' - 148 / 'FAIL' - 16