343 lines
10 KiB
Diff
343 lines
10 KiB
Diff
--- a/Kconfig 2022-08-25 10:11:47.220973785 -0400
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+++ b/Kconfig 2022-08-25 10:11:56.997682513 -0400
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@@ -30,3 +30,5 @@ source "lib/Kconfig"
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source "lib/Kconfig.debug"
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source "Documentation/Kconfig"
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+
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+source "distro/Kconfig"
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--- /dev/null 2022-08-25 07:13:06.694086407 -0400
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+++ b/distro/Kconfig 2022-08-25 13:21:55.150660724 -0400
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@@ -0,0 +1,291 @@
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+menu "Gentoo Linux"
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+
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+config GENTOO_LINUX
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+ bool "Gentoo Linux support"
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+
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+ default y
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+
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+ select CPU_FREQ_DEFAULT_GOV_SCHEDUTIL
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+
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+ help
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+ In order to boot Gentoo Linux a minimal set of config settings needs to
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+ be enabled in the kernel; to avoid the users from having to enable them
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+ manually as part of a Gentoo Linux installation or a new clean config,
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+ we enable these config settings by default for convenience.
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+
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+ See the settings that become available for more details and fine-tuning.
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+
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+config GENTOO_LINUX_UDEV
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+ bool "Linux dynamic and persistent device naming (userspace devfs) support"
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+
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+ depends on GENTOO_LINUX
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+ default y if GENTOO_LINUX
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+
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+ select DEVTMPFS
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+ select TMPFS
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+ select UNIX
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+
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+ select MMU
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+ select SHMEM
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+
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+ help
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+ In order to boot Gentoo Linux a minimal set of config settings needs to
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+ be enabled in the kernel; to avoid the users from having to enable them
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+ manually as part of a Gentoo Linux installation or a new clean config,
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+ we enable these config settings by default for convenience.
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+
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+ Currently this only selects TMPFS, DEVTMPFS and their dependencies.
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+ TMPFS is enabled to maintain a tmpfs file system at /dev/shm, /run and
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+ /sys/fs/cgroup; DEVTMPFS to maintain a devtmpfs file system at /dev.
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+
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+ Some of these are critical files that need to be available early in the
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+ boot process; if not available, it causes sysfs and udev to malfunction.
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+
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+ To ensure Gentoo Linux boots, it is best to leave this setting enabled;
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+ if you run a custom setup, you could consider whether to disable this.
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+
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+config GENTOO_LINUX_PORTAGE
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+ bool "Select options required by Portage features"
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+
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+ depends on GENTOO_LINUX
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+ default y if GENTOO_LINUX
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+
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+ select CGROUPS
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+ select NAMESPACES
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+ select IPC_NS
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+ select NET_NS
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+ select PID_NS
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+ select SYSVIPC
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+ select USER_NS
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+ select UTS_NS
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+
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+ help
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+ This enables options required by various Portage FEATURES.
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+ Currently this selects:
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+
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+ CGROUPS (required for FEATURES=cgroup)
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+ IPC_NS (required for FEATURES=ipc-sandbox)
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+ NET_NS (required for FEATURES=network-sandbox)
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+ PID_NS (required for FEATURES=pid-sandbox)
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+ SYSVIPC (required by IPC_NS)
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+
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+
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+ It is highly recommended that you leave this enabled as these FEATURES
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+ are, or will soon be, enabled by default.
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+
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+menu "Support for init systems, system and service managers"
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+ visible if GENTOO_LINUX
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+
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+config GENTOO_LINUX_INIT_SCRIPT
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+ bool "OpenRC, runit and other script based systems and managers"
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+
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+ default y if GENTOO_LINUX
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+
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+ depends on GENTOO_LINUX
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+
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+ select BINFMT_SCRIPT
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+ select CGROUPS
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+ select EPOLL
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+ select FILE_LOCKING
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+ select INOTIFY_USER
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+ select SIGNALFD
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+ select TIMERFD
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+
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+ help
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+ The init system is the first thing that loads after the kernel booted.
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+
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+ These config settings allow you to select which init systems to support;
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+ instead of having to select all the individual settings all over the
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+ place, these settings allows you to select all the settings at once.
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+
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+ This particular setting enables all the known requirements for OpenRC,
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+ runit and similar script based systems and managers.
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+
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+ If you are unsure about this, it is best to leave this setting enabled.
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+
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+config GENTOO_LINUX_INIT_SYSTEMD
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+ bool "systemd"
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+
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+ default n
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+
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+ depends on GENTOO_LINUX && GENTOO_LINUX_UDEV
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+
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+ select AUTOFS_FS
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+ select BLK_DEV_BSG
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+ select BPF_SYSCALL
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+ select CGROUP_BPF
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+ select CGROUPS
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+ select CRYPTO_HMAC
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+ select CRYPTO_SHA256
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+ select CRYPTO_USER_API_HASH
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+ select DEVPTS_MULTIPLE_INSTANCES
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+ select DMIID if X86_32 || X86_64 || X86
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+ select EPOLL
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+ select FANOTIFY
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+ select FHANDLE
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+ select FILE_LOCKING
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+ select INOTIFY_USER
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+ select IPV6
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+ select KCMP
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+ select NET
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+ select NET_NS
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+ select PROC_FS
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+ select SECCOMP if HAVE_ARCH_SECCOMP
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+ select SECCOMP_FILTER if HAVE_ARCH_SECCOMP_FILTER
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+ select SIGNALFD
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+ select SYSFS
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+ select TIMERFD
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+ select TMPFS_POSIX_ACL
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+ select TMPFS_XATTR
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+
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+ select ANON_INODES
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+ select BLOCK
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+ select EVENTFD
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+ select FSNOTIFY
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+ select INET
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+ select NLATTR
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+
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+ help
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+ The init system is the first thing that loads after the kernel booted.
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+
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+ These config settings allow you to select which init systems to support;
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+ instead of having to select all the individual settings all over the
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+ place, these settings allows you to select all the settings at once.
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+
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+ This particular setting enables all the known requirements for systemd;
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+ it also enables suggested optional settings, as the package suggests to.
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+
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+endmenu
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+
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+menuconfig GENTOO_KERNEL_SELF_PROTECTION
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+ bool "Kernel Self Protection Project"
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+ depends on GENTOO_LINUX
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+ help
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+ Recommended Kernel settings based on the suggestions from the Kernel Self Protection Project
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+ See: https://kernsec.org/wiki/index.php/Kernel_Self_Protection_Project/Recommended_Settings
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+ Note, there may be additional settings for which the CONFIG_ setting is invisible in menuconfig due
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+ to unmet dependencies. Search for GENTOO_KERNEL_SELF_PROTECTION_COMMON and search for
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+ GENTOO_KERNEL_SELF_PROTECTION_{X86_64, ARM64, X86_32, ARM} for dependency information on your
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+ specific architecture.
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+ Note 2: Please see the URL above for numeric settings, e.g. CONFIG_DEFAULT_MMAP_MIN_ADDR=65536
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+ for X86_64
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+
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+if GENTOO_KERNEL_SELF_PROTECTION
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+config GENTOO_KERNEL_SELF_PROTECTION_COMMON
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+ bool "Enable Kernel Self Protection Project Recommendations"
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+
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+ depends on GENTOO_LINUX && !ACPI_CUSTOM_METHOD && !COMPAT_BRK && !PROC_KCORE && !COMPAT_VDSO && !KEXEC && !HIBERNATION && !LEGACY_PTYS && !X86_X32 && !MODIFY_LDT_SYSCALL && GCC_PLUGINS && !IOMMU_DEFAULT_DMA_LAZY && !IOMMU_DEFAULT_PASSTHROUGH && IOMMU_DEFAULT_DMA_STRICT && SECURITY && !ARCH_EPHEMERAL_INODES && RANDSTRUCT_PERFORMANCE
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+
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+ select BUG
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+ select STRICT_KERNEL_RWX
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+ select DEBUG_WX
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+ select STACKPROTECTOR
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+ select STACKPROTECTOR_STRONG
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+ select STRICT_DEVMEM if DEVMEM=y
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+ select IO_STRICT_DEVMEM if DEVMEM=y
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+ select SYN_COOKIES
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+ select DEBUG_CREDENTIALS
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+ select DEBUG_NOTIFIERS
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+ select DEBUG_LIST
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+ select DEBUG_SG
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+ select HARDENED_USERCOPY if HAVE_HARDENED_USERCOPY_ALLOCATOR=y
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+ select KFENCE if HAVE_ARCH_KFENCE && (!SLAB || SLUB)
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+ select RANDOMIZE_KSTACK_OFFSET_DEFAULT if HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET && (INIT_STACK_NONE || !CC_IS_CLANG || CLANG_VERSION>=140000)
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+ select SECURITY_LANDLOCK
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+ select SCHED_CORE if SCHED_SMT
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+ select BUG_ON_DATA_CORRUPTION
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+ select SCHED_STACK_END_CHECK
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+ select SECCOMP if HAVE_ARCH_SECCOMP
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+ select SECCOMP_FILTER if HAVE_ARCH_SECCOMP_FILTER
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+ select SECURITY_YAMA
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+ select SLAB_FREELIST_RANDOM
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+ select SLAB_FREELIST_HARDENED
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+ select SHUFFLE_PAGE_ALLOCATOR
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+ select SLUB_DEBUG
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+ select PAGE_POISONING
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+ select PAGE_POISONING_NO_SANITY
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+ select PAGE_POISONING_ZERO
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+ select INIT_ON_ALLOC_DEFAULT_ON
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+ select INIT_ON_FREE_DEFAULT_ON
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+ select REFCOUNT_FULL
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+ select FORTIFY_SOURCE
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+ select SECURITY_DMESG_RESTRICT
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+ select PANIC_ON_OOPS
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+ select GCC_PLUGIN_LATENT_ENTROPY
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+ select GCC_PLUGIN_STRUCTLEAK
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+ select GCC_PLUGIN_STRUCTLEAK_BYREF_ALL
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+ select GCC_PLUGIN_RANDSTRUCT
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+ select GCC_PLUGIN_RANDSTRUCT_PERFORMANCE
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+ select ZERO_CALL_USED_REGS if CC_HAS_ZERO_CALL_USED_REGS
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+
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+ help
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+ Search for GENTOO_KERNEL_SELF_PROTECTION_{X86_64, ARM64, X86_32, ARM} for dependency
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+ information on your specific architecture. Note 2: Please see the URL above for
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+ numeric settings, e.g. CONFIG_DEFAULT_MMAP_MIN_ADDR=65536 for X86_64
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+
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+config GENTOO_KERNEL_SELF_PROTECTION_X86_64
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+ bool "X86_64 KSPP Settings" if GENTOO_KERNEL_SELF_PROTECTION_COMMON
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+
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+ depends on !X86_MSR && X86_64 && GENTOO_KERNEL_SELF_PROTECTION
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+ default n
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+
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+ select GCC_PLUGIN_STACKLEAK
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+ select LEGACY_VSYSCALL_NONE
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+ select PAGE_TABLE_ISOLATION
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+ select RANDOMIZE_BASE
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+ select RANDOMIZE_MEMORY
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+ select RELOCATABLE
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+ select VMAP_STACK
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+
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+
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+config GENTOO_KERNEL_SELF_PROTECTION_ARM64
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+ bool "ARM64 KSPP Settings"
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+
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+ depends on ARM64
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+ default n
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+
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+ select RANDOMIZE_BASE
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+ select RELOCATABLE
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+ select ARM64_SW_TTBR0_PAN
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+ select CONFIG_UNMAP_KERNEL_AT_EL0
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+ select GCC_PLUGIN_STACKLEAK
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+ select VMAP_STACK
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+
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+config GENTOO_KERNEL_SELF_PROTECTION_X86_32
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+ bool "X86_32 KSPP Settings"
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+
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+ depends on !X86_MSR && !MODIFY_LDT_SYSCALL && !M486 && X86_32
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+ default n
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+
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+ select HIGHMEM64G
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+ select X86_PAE
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+ select RANDOMIZE_BASE
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+ select RELOCATABLE
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+ select PAGE_TABLE_ISOLATION
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+
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+config GENTOO_KERNEL_SELF_PROTECTION_ARM
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+ bool "ARM KSPP Settings"
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+
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+ depends on !OABI_COMPAT && ARM
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+ default n
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+
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+ select VMSPLIT_3G
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+ select STRICT_MEMORY_RWX
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+ select CPU_SW_DOMAIN_PAN
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+
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+endif
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+
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+config GENTOO_PRINT_FIRMWARE_INFO
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+ bool "Print firmware information that the kernel attempts to load"
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+
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+ depends on GENTOO_LINUX
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+ default y
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+
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+ help
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+ Enable this option to print information about firmware that the kernel
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+ is attempting to load. This information can be accessible via the
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+ dmesg command-line utility
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+
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+ See the settings that become available for more details and fine-tuning.
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+
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+endmenu
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diff --git a/security/selinux/Kconfig b/security/selinux/Kconfig
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index 9e921fc72..f29bc13fa 100644
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--- a/security/selinux/Kconfig
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+++ b/security/selinux/Kconfig
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@@ -26,6 +26,7 @@ config SECURITY_SELINUX_BOOTPARAM
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config SECURITY_SELINUX_DISABLE
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bool "NSA SELinux runtime disable"
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depends on SECURITY_SELINUX
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+ depends on !GENTOO_KERNEL_SELF_PROTECTION
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select SECURITY_WRITABLE_HOOKS
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default n
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help
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--
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2.31.1
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From bd3ff0b16792c18c0614c2b95e148943209f460a Mon Sep 17 00:00:00 2001
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From: Georgy Yakovlev <gyakovlev@gentoo.org>
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Date: Tue, 8 Jun 2021 13:59:57 -0700
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Subject: [PATCH 2/2] set DEFAULT_MMAP_MIN_ADDR by default
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---
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mm/Kconfig | 2 ++
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1 file changed, 2 insertions(+)
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diff --git a/mm/Kconfig b/mm/Kconfig
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index 24c045b24..e13fc740c 100644
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--- a/mm/Kconfig
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+++ b/mm/Kconfig
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@@ -321,6 +321,8 @@ config KSM
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config DEFAULT_MMAP_MIN_ADDR
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int "Low address space to protect from user allocation"
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depends on MMU
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+ default 65536 if ( X86_64 || X86_32 || PPC64 || IA64 ) && GENTOO_KERNEL_SELF_PROTECTION
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+ default 32768 if ( ARM64 || ARM ) && GENTOO_KERNEL_SELF_PROTECTION
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default 4096
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help
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This is the portion of low virtual memory which should be protected
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--
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2.31.1
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```
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