path: root/4567_distro-Gentoo-Kconfig.patch

--- a/Kconfig	2021-06-04 19:03:33.646823432 -0400
+++ b/Kconfig	2021-06-04 19:03:40.508892817 -0400
@@ -30,3 +30,5 @@ source "lib/Kconfig"
 source "lib/Kconfig.debug"
 
 source "Documentation/Kconfig"
+
+source "distro/Kconfig"
--- /dev/null	2021-08-24 15:34:24.700702871 -0400
+++ b/distro/Kconfig	2021-08-24 15:49:16.965525424 -0400
@@ -0,0 +1,281 @@
+menu "Gentoo Linux"
+
+config GENTOO_LINUX
+	bool "Gentoo Linux support"
+
+	default y
+
+	help
+		In order to boot Gentoo Linux a minimal set of config settings needs to
+		be enabled in the kernel; to avoid the users from having to enable them
+		manually as part of a Gentoo Linux installation or a new clean config,
+		we enable these config settings by default for convenience.
+
+		See the settings that become available for more details and fine-tuning.
+
+config GENTOO_LINUX_UDEV
+	bool "Linux dynamic and persistent device naming (userspace devfs) support"
+
+	depends on GENTOO_LINUX
+	default y if GENTOO_LINUX
+
+	select DEVTMPFS
+	select TMPFS
+	select UNIX
+
+	select MMU
+	select SHMEM
+
+	help
+		In order to boot Gentoo Linux a minimal set of config settings needs to
+		be enabled in the kernel; to avoid the users from having to enable them
+		manually as part of a Gentoo Linux installation or a new clean config,
+		we enable these config settings by default for convenience.
+
+		Currently this only selects TMPFS, DEVTMPFS and their dependencies.
+		TMPFS is enabled to maintain a tmpfs file system at /dev/shm, /run and
+		/sys/fs/cgroup; DEVTMPFS to maintain a devtmpfs file system at /dev.
+
+		Some of these are critical files that need to be available early in the
+		boot process; if not available, it causes sysfs and udev to malfunction.
+
+		To ensure Gentoo Linux boots, it is best to leave this setting enabled;
+		if you run a custom setup, you could consider whether to disable this.
+
+config GENTOO_LINUX_PORTAGE
+	bool "Select options required by Portage features"
+
+	depends on GENTOO_LINUX
+	default y if GENTOO_LINUX
+
+	select CGROUPS
+	select NAMESPACES
+	select IPC_NS
+	select NET_NS
+	select PID_NS
+	select SYSVIPC
+	select USER_NS
+	select UTS_NS
+
+	help
+		This enables options required by various Portage FEATURES.
+		Currently this selects:
+
+		CGROUPS     (required for FEATURES=cgroup)
+		IPC_NS      (required for FEATURES=ipc-sandbox)
+		NET_NS      (required for FEATURES=network-sandbox)
+		PID_NS		(required for FEATURES=pid-sandbox)
+		SYSVIPC     (required by IPC_NS)
+   
+
+		It is highly recommended that you leave this enabled as these FEATURES
+		are, or will soon be, enabled by default.
+
+menu "Support for init systems, system and service managers"
+	visible if GENTOO_LINUX
+
+config GENTOO_LINUX_INIT_SCRIPT
+	bool "OpenRC, runit and other script based systems and managers"
+
+	default y if GENTOO_LINUX
+
+	depends on GENTOO_LINUX
+
+	select BINFMT_SCRIPT
+	select CGROUPS
+	select EPOLL
+	select FILE_LOCKING
+	select INOTIFY_USER
+	select SIGNALFD
+	select TIMERFD
+
+	help
+		The init system is the first thing that loads after the kernel booted.
+
+		These config settings allow you to select which init systems to support;
+		instead of having to select all the individual settings all over the
+		place, these settings allows you to select all the settings at once.
+
+		This particular setting enables all the known requirements for OpenRC,
+		runit and similar script based systems and managers.
+
+		If you are unsure about this, it is best to leave this setting enabled.
+
+config GENTOO_LINUX_INIT_SYSTEMD
+	bool "systemd"
+
+	default n
+
+	depends on GENTOO_LINUX && GENTOO_LINUX_UDEV
+
+	select AUTOFS4_FS
+	select BLK_DEV_BSG
+	select BPF_SYSCALL
+	select CGROUP_BPF
+	select CGROUPS
+	select CHECKPOINT_RESTORE
+	select CRYPTO_HMAC 
+	select CRYPTO_SHA256
+	select CRYPTO_USER_API_HASH
+	select DEVPTS_MULTIPLE_INSTANCES
+	select DMIID if X86_32 || X86_64 || X86
+	select EPOLL
+	select FANOTIFY
+	select FHANDLE
+	select FILE_LOCKING
+	select INOTIFY_USER
+	select IPV6
+	select NET
+	select NET_NS
+	select PROC_FS
+	select SECCOMP if HAVE_ARCH_SECCOMP
+	select SECCOMP_FILTER if HAVE_ARCH_SECCOMP_FILTER
+	select SIGNALFD
+	select SYSFS
+	select TIMERFD
+	select TMPFS_POSIX_ACL
+	select TMPFS_XATTR
+
+	select ANON_INODES
+	select BLOCK
+	select EVENTFD
+	select FSNOTIFY
+	select INET
+	select NLATTR
+
+	help
+		The init system is the first thing that loads after the kernel booted.
+
+		These config settings allow you to select which init systems to support;
+		instead of having to select all the individual settings all over the
+		place, these settings allows you to select all the settings at once.
+
+		This particular setting enables all the known requirements for systemd;
+		it also enables suggested optional settings, as the package suggests to.
+
+endmenu
+
+menuconfig GENTOO_KERNEL_SELF_PROTECTION
+	bool "Kernel Self Protection Project"
+	depends on GENTOO_LINUX
+	help
+		Recommended Kernel settings based on the suggestions from the Kernel Self Protection Project
+		See: https://kernsec.org/wiki/index.php/Kernel_Self_Protection_Project/Recommended_Settings
+		Note, there may be additional settings for which the CONFIG_ setting is invisible in menuconfig due 
+		to unmet dependencies. Search for GENTOO_KERNEL_SELF_PROTECTION_COMMON and search for 
+		GENTOO_KERNEL_SELF_PROTECTION_{X86_64, ARM64, X86_32, ARM} for dependency information on your 
+		specific architecture.
+		Note 2: Please see the URL above for numeric settings, e.g. CONFIG_DEFAULT_MMAP_MIN_ADDR=65536 
+		for X86_64
+
+if GENTOO_KERNEL_SELF_PROTECTION
+config GENTOO_KERNEL_SELF_PROTECTION_COMMON
+	bool "Enable Kernel Self Protection Project Recommendations"
+
+	depends on GENTOO_LINUX && !ACPI_CUSTOM_METHOD && !COMPAT_BRK && !DEVKMEM && !PROC_KCORE && !COMPAT_VDSO && !KEXEC && !HIBERNATION && !LEGACY_PTYS && !X86_X32 && !MODIFY_LDT_SYSCALL && GCC_PLUGINS
+
+	select BUG
+	select STRICT_KERNEL_RWX
+	select DEBUG_WX
+	select STACKPROTECTOR
+	select STACKPROTECTOR_STRONG
+	select STRICT_DEVMEM if DEVMEM=y
+	select IO_STRICT_DEVMEM if DEVMEM=y
+	select SYN_COOKIES
+	select DEBUG_CREDENTIALS
+	select DEBUG_NOTIFIERS
+	select DEBUG_LIST
+	select DEBUG_SG
+	select BUG_ON_DATA_CORRUPTION
+	select SCHED_STACK_END_CHECK
+	select SECCOMP if HAVE_ARCH_SECCOMP
+	select SECCOMP_FILTER if HAVE_ARCH_SECCOMP_FILTER
+	select SECURITY_YAMA
+	select SLAB_FREELIST_RANDOM
+	select SLAB_FREELIST_HARDENED
+	select SHUFFLE_PAGE_ALLOCATOR
+	select SLUB_DEBUG
+	select PAGE_POISONING
+	select PAGE_POISONING_NO_SANITY
+	select PAGE_POISONING_ZERO
+	select INIT_ON_ALLOC_DEFAULT_ON
+	select INIT_ON_FREE_DEFAULT_ON
+	select VMAP_STACK
+	select REFCOUNT_FULL
+	select FORTIFY_SOURCE
+	select SECURITY_DMESG_RESTRICT
+	select PANIC_ON_OOPS
+	select GCC_PLUGIN_LATENT_ENTROPY
+	select GCC_PLUGIN_STRUCTLEAK
+	select GCC_PLUGIN_STRUCTLEAK_BYREF_ALL
+	select GCC_PLUGIN_STACKLEAK
+	select GCC_PLUGIN_RANDSTRUCT
+	select GCC_PLUGIN_RANDSTRUCT_PERFORMANCE
+
+	help
+		Search for GENTOO_KERNEL_SELF_PROTECTION_{X86_64, ARM64, X86_32, ARM} for dependency 
+		information on your specific architecture.  Note 2: Please see the URL above for 
+		numeric settings, e.g. CONFIG_DEFAULT_MMAP_MIN_ADDR=65536 for X86_64
+
+config GENTOO_KERNEL_SELF_PROTECTION_X86_64
+	bool "X86_64 KSPP Settings" if GENTOO_KERNEL_SELF_PROTECTION_COMMON
+
+	depends on !X86_MSR && X86_64 && GENTOO_KERNEL_SELF_PROTECTION
+	default n
+	
+	select RANDOMIZE_BASE
+	select RANDOMIZE_MEMORY
+	select RELOCATABLE
+	select LEGACY_VSYSCALL_NONE
+ 	select PAGE_TABLE_ISOLATION
+
+
+config GENTOO_KERNEL_SELF_PROTECTION_ARM64
+	bool "ARM64 KSPP Settings"
+
+	depends on ARM64
+	default n
+
+	select RANDOMIZE_BASE
+	select RELOCATABLE
+	select ARM64_SW_TTBR0_PAN
+	select CONFIG_UNMAP_KERNEL_AT_EL0
+
+config GENTOO_KERNEL_SELF_PROTECTION_X86_32
+	bool "X86_32 KSPP Settings"
+
+	depends on !X86_MSR && !MODIFY_LDT_SYSCALL && !M486 && X86_32
+	default n
+
+	select HIGHMEM64G
+	select X86_PAE
+	select RANDOMIZE_BASE
+	select RELOCATABLE
+	select PAGE_TABLE_ISOLATION
+
+config GENTOO_KERNEL_SELF_PROTECTION_ARM
+	bool "ARM KSPP Settings"
+
+	depends on !OABI_COMPAT && ARM
+	default n
+
+	select VMSPLIT_3G
+	select STRICT_MEMORY_RWX
+	select CPU_SW_DOMAIN_PAN
+
+endif
+
+config GENTOO_PRINT_FIRMWARE_INFO
+	bool "Print firmware information that the kernel attempts to load"
+
+	depends on GENTOO_LINUX
+	default y
+
+	help
+		Enable this option to print information about firmware that the kernel
+		is attempting to load.  This information can be accessible via the
+		dmesg command-line utility
+
+		See the settings that become available for more details and fine-tuning.
+
+endmenu
diff --git a/security/Kconfig b/security/Kconfig
index 7561f6f99..01f0bf73f 100644
--- a/security/Kconfig
+++ b/security/Kconfig
@@ -166,6 +166,7 @@ config HARDENED_USERCOPY
 config HARDENED_USERCOPY_FALLBACK
 	bool "Allow usercopy whitelist violations to fallback to object size"
 	depends on HARDENED_USERCOPY
+	depends on !GENTOO_KERNEL_SELF_PROTECTION
 	default y
 	help
 	  This is a temporary option that allows missing usercopy whitelists
@@ -181,6 +182,7 @@ config HARDENED_USERCOPY_PAGESPAN
 	bool "Refuse to copy allocations that span multiple pages"
 	depends on HARDENED_USERCOPY
 	depends on EXPERT
+	depends on !GENTOO_KERNEL_SELF_PROTECTION
 	help
 	  When a multi-page allocation is done without __GFP_COMP,
 	  hardened usercopy will reject attempts to copy it. There are,
diff --git a/security/selinux/Kconfig b/security/selinux/Kconfig
index 9e921fc72..f29bc13fa 100644
--- a/security/selinux/Kconfig
+++ b/security/selinux/Kconfig
@@ -26,6 +26,7 @@ config SECURITY_SELINUX_BOOTPARAM
 config SECURITY_SELINUX_DISABLE
 	bool "NSA SELinux runtime disable"
 	depends on SECURITY_SELINUX
+	depends on !GENTOO_KERNEL_SELF_PROTECTION
 	select SECURITY_WRITABLE_HOOKS
 	default n
 	help
-- 
2.31.1

From bd3ff0b16792c18c0614c2b95e148943209f460a Mon Sep 17 00:00:00 2001
From: Georgy Yakovlev <gyakovlev@gentoo.org>
Date: Tue, 8 Jun 2021 13:59:57 -0700
Subject: [PATCH 2/2] set DEFAULT_MMAP_MIN_ADDR by default

---
 mm/Kconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/Kconfig b/mm/Kconfig
index 24c045b24..e13fc740c 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -321,6 +321,8 @@ config KSM
 config DEFAULT_MMAP_MIN_ADDR
 	int "Low address space to protect from user allocation"
 	depends on MMU
+	default 65536 if ( X86_64 || X86_32 || PPC64 || IA64 ) && GENTOO_KERNEL_SELF_PROTECTION
+	default 32768 if ( ARM64 || ARM ) && GENTOO_KERNEL_SELF_PROTECTION
 	default 4096
 	help
 	  This is the portion of low virtual memory which should be protected
-- 
2.31.1
```