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README.md

Install dependencies

  • xbps-install -Sy make gcc xz elfutils elfutils-devel flex ncurses-devel openssl openssl-devel argp-standalone gcc-ada mpc libmpc-devel gmp-devel perl

Steps to create

  • cd /usr/src/
  • wget https://git.arrr.cloud/whichdoc/plague-kernel/-/raw/main/5.10-hardened.config -o linux-hardened-"$KVER"/.config
  • /usr/bin/curl --verbose --tlsv1.3 --proto =https -L -O --url "https://github.com/anthraxx/linux-hardened/archive/refs/tags/5.10."$KVER"-hardened1.tar.gz"
  • tar -xvf 5.10."$KVER"-hardened1.tar.gz
  • cd 5.10."$KVER"-hardened1
  • make oldconfig
  • make menuconfig # (if any changes are required)
  • make --jobs=4 # start compiling with your number of allocated threads
  • make modules_install # create /lib/modules/$kver
  • cp ./arch/x86_64/boot/bzImage /boot/vmlinuz-5.10."$KVER"-hardened1_1 && dracut --kver 5.10."$KVER"-hardened1_1 --force
  • grub-mkconfig -o /boot/grub/grub.cfg
  • xbps-reconfigure -fa

Steps to import/configure release

  • Built into PlagueOS installer

Troubleshooting:

  • lsinitrd -v /boot/initramfs-5.10."$KVER"-hardened1_1.img

Additional Resources:

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
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