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Many improvements to the hardenDefconfig function
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commit
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3 changed files with 15 additions and 6 deletions
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@ -81,21 +81,30 @@ hardenDefconfig() {
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#Attempts to enable/disable supported options to increase security
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#See https://kernsec.org/wiki/index.php/Kernel_Self_Protection_Project/Recommended_Settings
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if ls arch/arm*/configs/lineage*defconfig 1> /dev/null 2>&1; then
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defconfigPath="arch/arm/configs/lineage*defconfig arch/arm64/configs/lineage*defconfig";
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if ls arch/arm/configs/lineage*defconfig 1> /dev/null 2>&1; then
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defconfigPath="arch/arm/configs/lineage*defconfig";
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elif ls arch/arm64/configs/lineage*defconfig 1> /dev/null 2>&1; then
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defconfigPath="arch/arm64/configs/lineage*defconfig";
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else
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defconfigPath="arch/arm/configs/*defconfig arch/arm64/configs/*defconfig";
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fi;
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#echo "Found defconfig at $defconfigPath"
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#Enable supported options
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#Disabled: CONFIG_DEBUG_SG (bootloops - https://patchwork.kernel.org/patch/8989981)
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declare -a optionsYes=("CONFIG_ARM64_SW_TTBR0_PAN" "CONFIG_BUG_ON_DATA_CORRUPTION" "CONFIG_BUG" "CONFIG_CC_STACKPROTECTOR_STRONG" "CONFIG_CC_STACKPROTECTOR" "CONFIG_CPU_SW_DOMAIN_PAN" "CONFIG_DEBUG_CREDENTIALS" "CONFIG_DEBUG_KERNEL" "CONFIG_DEBUG_LIST" "CONFIG_DEBUG_NOTIFIERS" "CONFIG_DEBUG_RODATA" "CONFIG_DEBUG_WX" "CONFIG_FORTIFY_SOURCE" "CONFIG_GCC_PLUGIN_LATENT_ENTROPY" "CONFIG_GCC_PLUGIN_RANDSTRUCT" "CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL" "CONFIG_GCC_PLUGIN_STRUCTLEAK" "CONFIG_GCC_PLUGINS" "CONFIG_HARDENED_USERCOPY" "CONFIG_IO_STRICT_DEVMEM" "CONFIG_LEGACY_VSYSCALL_NONE" "CONFIG_PAGE_POISONING_NO_SANITY" "CONFIG_PAGE_POISONING" "CONFIG_PAGE_POISONING_ZERO" "CONFIG_PANIC_ON_OOPS" "CONFIG_RANDOMIZE_BASE" "CONFIG_REFCOUNT_FULL" "CONFIG_SCHED_STACK_END_CHECK" "CONFIG_SECCOMP_FILTER" "CONFIG_SECCOMP" "CONFIG_SECURITY" "CONFIG_SECURITY_YAMA" "CONFIG_SECURITY_YAMA_STACKED" "CONFIG_SLAB_FREELIST_RANDOM" "CONFIG_SLAB_HARDENED" "CONFIG_SLUB_DEBUG" "CONFIG_STRICT_DEVMEM" "CONFIG_STRICT_KERNEL_RWX" "CONFIG_STRICT_MEMORY_RWX" "CONFIG_SYN_COOKIES" "CONFIG_VMAP_STACK")
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declare -a optionsYes=("CONFIG_ARM64_SW_TTBR0_PAN" "CONFIG_BUG_ON_DATA_CORRUPTION" "CONFIG_BUG" "CONFIG_CC_STACKPROTECTOR_STRONG" "CONFIG_CC_STACKPROTECTOR" "CONFIG_CPU_SW_DOMAIN_PAN" "CONFIG_DEBUG_CREDENTIALS" "CONFIG_DEBUG_KERNEL" "CONFIG_DEBUG_LIST" "CONFIG_DEBUG_NOTIFIERS" "CONFIG_DEBUG_RODATA" "CONFIG_DEBUG_WX" "CONFIG_FORTIFY_SOURCE" "CONFIG_GCC_PLUGIN_LATENT_ENTROPY" "CONFIG_GCC_PLUGIN_RANDSTRUCT" "CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL" "CONFIG_GCC_PLUGIN_STRUCTLEAK" "CONFIG_GCC_PLUGINS" "CONFIG_HARDENED_USERCOPY" "CONFIG_IO_STRICT_DEVMEM" "CONFIG_LEGACY_VSYSCALL_NONE" "CONFIG_PAGE_POISONING_NO_SANITY" "CONFIG_PAGE_POISONING" "CONFIG_PAGE_POISONING_ZERO" "CONFIG_PANIC_ON_OOPS" "CONFIG_RANDOMIZE_BASE" "CONFIG_REFCOUNT_FULL" "CONFIG_SCHED_STACK_END_CHECK" "CONFIG_SECCOMP_FILTER" "CONFIG_SECCOMP" "CONFIG_SECURITY" "CONFIG_SECURITY_YAMA" "CONFIG_SECURITY_YAMA_STACKED" "CONFIG_SLAB_FREELIST_RANDOM" "CONFIG_SLAB_HARDENED" "CONFIG_SLUB_DEBUG" "CONFIG_STRICT_DEVMEM" "CONFIG_STRICT_KERNEL_RWX" "CONFIG_STRICT_MEMORY_RWX" "CONFIG_SYN_COOKIES" "CONFIG_VMAP_STACK" "CONFIG_SECURITY_PERF_EVENTS_RESTRICT")
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for option in "${optionsYes[@]}"
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do
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sed -i 's/# '$option' is not set/'$option'=y/' $defconfigPath &>/dev/null || true;
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#Some defconfigs are very minimal/not-autogenerated, so lets add the rest. Obviously most won't have any affect as they aren't supported.
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if [[ $defconfigPath == *"lineage"* ]]; then
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if ! grep -q $option"=y" $defconfigPath; then
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echo $option"=y" | tee -a $defconfigPath > /dev/null;
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fi;
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fi;
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done
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#Disable supported options
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declare -a optionsNo=("CONFIG_SECURITY_SELINUX_DISABLE" "CONFIG_PROC_KCORE" "CONFIG_OABI_COMPAT" "CONFIG_KEXEC" "CONFIG_LEGACY_PTYS" "CONFIG_HIBERNATION" "CONFIG_INET_DIAG" "CONFIG_DEVKMEM" "CONFIG_DEVMEM" "CONFIG_COMPAT_BRK" "CONFIG_COMPAT_VDSO" "CONFIG_BINFMT_MISC" "CONFIG_ACPI_CUSTOM_METHOD")
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declare -a optionsNo=("CONFIG_SECURITY_SELINUX_DISABLE" "CONFIG_PROC_KCORE" "CONFIG_OABI_COMPAT" "CONFIG_KEXEC" "CONFIG_LEGACY_PTYS" "CONFIG_HIBERNATION" "CONFIG_INET_DIAG" "CONFIG_DEVKMEM" "CONFIG_DEVMEM" "CONFIG_COMPAT_BRK" "CONFIG_COMPAT_VDSO" "CONFIG_BINFMT_MISC" "CONFIG_ACPI_CUSTOM_METHOD" "CONFIG_MSM_BUSPM_DEV" "CONFIG_CP_ACCESS64")
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for option in "${optionsNo[@]}"
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do
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sed -i 's/'$option'=y/# '$option' is not set/' $defconfigPath &>/dev/null || true;
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