diff options
Diffstat (limited to 'pkgs/os-specific/linux/kernel/hardened')
| -rw-r--r-- | pkgs/os-specific/linux/kernel/hardened/anthraxx.asc | 325 | ||||
| -rw-r--r-- | pkgs/os-specific/linux/kernel/hardened/config.nix | 133 | ||||
| -rw-r--r-- | pkgs/os-specific/linux/kernel/hardened/patches.json | 82 | ||||
| -rwxr-xr-x | pkgs/os-specific/linux/kernel/hardened/update.py | 306 |
4 files changed, 0 insertions, 846 deletions
diff --git a/pkgs/os-specific/linux/kernel/hardened/anthraxx.asc b/pkgs/os-specific/linux/kernel/hardened/anthraxx.asc deleted file mode 100644 index 101ccfbf0f2b..000000000000 --- a/pkgs/os-specific/linux/kernel/hardened/anthraxx.asc +++ /dev/null @@ -1,325 +0,0 @@ ------BEGIN PGP PUBLIC KEY BLOCK----- -Version: GnuPG v2 - -mQINBE64OEUBEADPS1v+zoCdKA6zyfUtVIaBoIwMhCibqurXi30tVoC9LgM6W1ve -HwPFukWq7DAS0mZUPE3mSV63JFLaTy0bY/6GO1D4wLdWZx4ppH7XKNCvKCbsi70k -UozFykNVf+83WEskuF1oYzXlF3aB5suz2IWJl7ey1EXgIpehwQaTJUA5JIWYFp9A -566LRNJefYMzUR33xc4dRKj6Etg0xdLVq7/vZoo8HpLCBGNWiP0AKqFWEwTg0xQL -7nsJA5tfJJdwAJvrzjpFsvb63PKG6waAtdHhON4q7E2Udak9fz2tRjxA5l9l2zXk -aqsysUzkxPhNjwMENoQ04KZg4aT+ZhhBzTowSWLp3KV2uaZ66kdPUO3s+/1bPp5/ -N/IlykaUwyL773iYOZ5dOY/9hIuX/zssihcrGEMW6yIyZR5uKhzYdaM9ExTXP637 -UccgNS9/pskPGPx/xK23NDCfeHzL9YHS5KokA2wb/b9hqpwvLaeblbMl2pt79F1R -ac+rZlrRyX3NvlTQP4hqM9Ei2YBAU7QFDJEjH8pVIceL7grxi1Ju1iD5QiSK+je5 -Jj5EAikfwSeAttSzsqNvaXJHfABrv5mkkVt1z3icP3HIHTYnG+uj+t8kvW+o9/1i 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http://kernsec.org/wiki/index.php/Kernel_Self_Protection_Project#Recommended_settings -# https://wiki.gentoo.org/wiki/Hardened/Hardened_Kernel_Project -# -# Dangerous features that can be permanently (for the boot session) disabled at -# boot via sysctl or kernel cmdline are left enabled here, for improved -# flexibility. -# -# See also <nixos/modules/profiles/hardened.nix> - -{ stdenv, lib, version }: - -with lib; -with lib.kernel; -with (lib.kernel.whenHelpers version); - -assert (versionAtLeast version "4.9"); - -{ - # Report BUG() conditions and kill the offending process. - BUG = yes; - - # Mark LSM hooks read-only after init. SECURITY_WRITABLE_HOOKS n - # conflicts with SECURITY_SELINUX_DISABLE y; disabling the latter - # implicitly marks LSM hooks read-only after init. - # - # SELinux can only be disabled at boot via selinux=0 - # - # We set SECURITY_WRITABLE_HOOKS n primarily for documentation purposes; the - # config builder fails to detect that it has indeed been unset. - SECURITY_SELINUX_DISABLE = whenOlder "6.4" no; # On 6.4: error: unused option: SECURITY_SELINUX_DISABLE - SECURITY_WRITABLE_HOOKS = option no; - - STRICT_KERNEL_RWX = yes; - - # Perform additional validation of commonly targeted structures. - DEBUG_CREDENTIALS = whenOlder "6.6" yes; - DEBUG_NOTIFIERS = yes; - DEBUG_PI_LIST = whenOlder "5.2" yes; # doesn't BUG() - DEBUG_PLIST = whenAtLeast "5.2" yes; - DEBUG_SG = yes; - DEBUG_VIRTUAL = yes; - SCHED_STACK_END_CHECK = yes; - - REFCOUNT_FULL = whenOlder "5.4.208" yes; - - # tell EFI to wipe memory during reset - # https://lwn.net/Articles/730006/ - RESET_ATTACK_MITIGATION = yes; - - # restricts loading of line disciplines via TIOCSETD ioctl to CAP_SYS_MODULE - CONFIG_LDISC_AUTOLOAD = option no; - - # Randomize page allocator when page_alloc.shuffle=1 - SHUFFLE_PAGE_ALLOCATOR = whenAtLeast "5.2" yes; - - # Wipe higher-level memory allocations on free() with page_poison=1 - PAGE_POISONING = yes; - PAGE_POISONING_NO_SANITY = whenOlder "5.11" yes; - PAGE_POISONING_ZERO = whenOlder "5.11" yes; - - # Enable init_on_alloc and init_on_free by default - INIT_ON_ALLOC_DEFAULT_ON = whenAtLeast "5.3" yes; - INIT_ON_FREE_DEFAULT_ON = whenAtLeast "5.3" yes; - - # Wipe all caller-used registers on exit from a function - ZERO_CALL_USED_REGS = whenAtLeast "5.15" yes; - - # Enable the SafeSetId LSM - SECURITY_SAFESETID = whenAtLeast "5.1" yes; - - # Reboot devices immediately if kernel experiences an Oops. - PANIC_TIMEOUT = freeform "-1"; - - GCC_PLUGINS = yes; # Enable gcc plugin options - # Gather additional entropy at boot time for systems that may not have appropriate entropy sources. - GCC_PLUGIN_LATENT_ENTROPY = yes; - - GCC_PLUGIN_STRUCTLEAK = option yes; # A port of the PaX structleak plugin - GCC_PLUGIN_STRUCTLEAK_BYREF_ALL = option yes; # Also cover structs passed by address - GCC_PLUGIN_STACKLEAK = whenAtLeast "4.20" yes; # A port of the PaX stackleak plugin - GCC_PLUGIN_RANDSTRUCT = whenOlder "5.19" yes; # A port of the PaX randstruct plugin - GCC_PLUGIN_RANDSTRUCT_PERFORMANCE = whenOlder "5.19" yes; - - # Runtime undefined behaviour checks - # https://www.kernel.org/doc/html/latest/dev-tools/ubsan.html - # https://developers.redhat.com/blog/2014/10/16/gcc-undefined-behavior-sanitizer-ubsan - UBSAN = yes; - UBSAN_TRAP = whenAtLeast "5.7" yes; - UBSAN_BOUNDS = whenAtLeast "5.7" yes; - UBSAN_SANITIZE_ALL = whenOlder "6.9" yes; - UBSAN_LOCAL_BOUNDS = option yes; # clang only - CFI_CLANG = option yes; # clang only Control Flow Integrity since 6.1 - - # Same as GCC_PLUGIN_RANDSTRUCT*, but has been renamed to `RANDSTRUCT*` in 5.19. - RANDSTRUCT = whenAtLeast "5.19" yes; - RANDSTRUCT_PERFORMANCE = whenAtLeast "5.19" yes; - - # Disable various dangerous settings - ACPI_CUSTOM_METHOD = whenOlder "6.9" no; # Allows writing directly to physical memory - PROC_KCORE = no; # Exposes kernel text image layout - INET_DIAG = no; # Has been used for heap based attacks in the past - - # INET_DIAG=n causes the following options to not exist anymore, but since they are defined in common-config.nix, - # make them optional - INET_DIAG_DESTROY = option no; - INET_RAW_DIAG = option no; - INET_TCP_DIAG = option no; - INET_UDP_DIAG = option no; - INET_MPTCP_DIAG = option no; - - # Use -fstack-protector-strong (gcc 4.9+) for best stack canary coverage. - CC_STACKPROTECTOR_REGULAR = lib.mkForce (whenOlder "4.18" no); - CC_STACKPROTECTOR_STRONG = whenOlder "4.18" yes; - - # Detect out-of-bound reads/writes and use-after-free - KFENCE = whenAtLeast "5.12" yes; - - # CONFIG_DEVMEM=n causes these to not exist anymore. - STRICT_DEVMEM = option no; - IO_STRICT_DEVMEM = option no; - - # stricter IOMMU TLB invalidation - IOMMU_DEFAULT_DMA_STRICT = option yes; - IOMMU_DEFAULT_DMA_LAZY = option no; - - # not needed for less than a decade old glibc versions - LEGACY_VSYSCALL_NONE = yes; - - # Straight-Line-Speculation - # https://lwn.net/Articles/877845/ - SLS = option yes; -} diff --git a/pkgs/os-specific/linux/kernel/hardened/patches.json b/pkgs/os-specific/linux/kernel/hardened/patches.json deleted file mode 100644 index 62f1fcdda20c..000000000000 --- a/pkgs/os-specific/linux/kernel/hardened/patches.json +++ /dev/null @@ -1,82 +0,0 @@ -{ - "4.19": { - "patch": { - "extra": "-hardened1", - "name": "linux-hardened-4.19.315-hardened1.patch", - "sha256": "1w17mwsv618pw5bkahmz6in0i5zjjxd3d14gggafqdd3dgfr1h8q", - "url": "https://github.com/anthraxx/linux-hardened/releases/download/4.19.315-hardened1/linux-hardened-4.19.315-hardened1.patch" - }, - "sha256": "1j1j8awy0237jp2r211qpa305c10y7rlcbkxkzdvzbgyhwy4spkc", - "version": "4.19.315" - }, - "5.10": { - "patch": { - "extra": "-hardened1", - "name": "linux-hardened-5.10.218-hardened1.patch", - "sha256": "1ah4pznha17ngg3w7l0j74h4910gjv8qj503adrap7plvapf82m4", - "url": "https://github.com/anthraxx/linux-hardened/releases/download/5.10.218-hardened1/linux-hardened-5.10.218-hardened1.patch" - }, - "sha256": "1mmj5hwm5i16gc1y4nzr1cs882vi6vrihrincdcivv63x11v4dlw", - "version": "5.10.218" - }, - "5.15": { - "patch": { - "extra": "-hardened1", - "name": "linux-hardened-5.15.160-hardened1.patch", - "sha256": "1r10ylx886rslsmrixlijjm4crhwzkl3wj6kpyn2344qik1gxpqr", - "url": "https://github.com/anthraxx/linux-hardened/releases/download/5.15.160-hardened1/linux-hardened-5.15.160-hardened1.patch" - }, - "sha256": "018v19a7rhzc4szybzzn86jlnk42x7jm6xkadfd2d3xq6f7727pl", - "version": "5.15.160" - }, - "5.4": { - "patch": { - "extra": "-hardened1", - "name": "linux-hardened-5.4.277-hardened1.patch", - "sha256": "1zjw5wl8lj69j402qm8dg3m4dxgq3ppx2jyz8jks976vyhh8fsg4", - "url": "https://github.com/anthraxx/linux-hardened/releases/download/5.4.277-hardened1/linux-hardened-5.4.277-hardened1.patch" - }, - "sha256": "0l8zq3k07hdprfpvw69ykkf2pdg8wiv28xz733yxsjcfb0l5n7vy", - "version": "5.4.277" - }, - "6.1": { - "patch": { - "extra": "-hardened1", - "name": "linux-hardened-6.1.92-hardened1.patch", - "sha256": "0cw87ygmisi823y3f7xrck12b6zh3mq1qmb7lcmr3hg6w3xskmn3", - "url": "https://github.com/anthraxx/linux-hardened/releases/download/6.1.92-hardened1/linux-hardened-6.1.92-hardened1.patch" - }, - "sha256": "1j9n8gk76nn4gw42iba5zgghr360gb9n1mslr5dyv76wpwkz86ch", - "version": "6.1.92" - }, - "6.6": { - "patch": { - "extra": "-hardened1", - "name": "linux-hardened-6.6.32-hardened1.patch", - "sha256": "19362a6lxs3cnaw19jvda7n791y95lfgn9ki4wmaxnw2qbpi0bgg", - "url": "https://github.com/anthraxx/linux-hardened/releases/download/6.6.32-hardened1/linux-hardened-6.6.32-hardened1.patch" - }, - "sha256": "1qbc8dqmk2xs1cz968rysw5xvhq3lj8g0pxp48fr2qbzy3m29a5a", - "version": "6.6.32" - }, - "6.8": { - "patch": { - "extra": "-hardened1", - "name": "linux-hardened-6.8.11-hardened1.patch", - "sha256": "08i03dmri9h6jxcjd9g6s7pv0spqi3f4fgch1ars68cgngikvbpq", - "url": "https://github.com/anthraxx/linux-hardened/releases/download/6.8.11-hardened1/linux-hardened-6.8.11-hardened1.patch" - }, - "sha256": "1di8kr596sf68sm61kp5rz6bn3sb0q5ag1qc5hm8f9dpyq4wv3dp", - "version": "6.8.11" - }, - "6.9": { - "patch": { - "extra": "-hardened1", - "name": "linux-hardened-6.9.2-hardened1.patch", - "sha256": "0ph1m0pnlqrhvddz2mjgcwvs0ddcpzigz8kgi9zi063qinlfbm3q", - "url": "https://github.com/anthraxx/linux-hardened/releases/download/6.9.2-hardened1/linux-hardened-6.9.2-hardened1.patch" - }, - "sha256": "1yg5j284y1gz7zwxjz2abvlnas259m1y1vzd9lmcqqar5kgmnv6l", - "version": "6.9.2" - } -} diff --git a/pkgs/os-specific/linux/kernel/hardened/update.py b/pkgs/os-specific/linux/kernel/hardened/update.py deleted file mode 100755 index 1e34ca209aa9..000000000000 --- a/pkgs/os-specific/linux/kernel/hardened/update.py +++ /dev/null @@ -1,306 +0,0 @@ -#! /usr/bin/env nix-shell -#! nix-shell -i python -p "python3.withPackages (ps: [ps.pygithub ps.packaging])" git gnupg - -# This is automatically called by ../update.sh. - -from __future__ import annotations - -import json -import os -import re -import subprocess -import sys -from dataclasses import dataclass -from pathlib import Path -from tempfile import TemporaryDirectory -from typing import ( - Dict, - Iterator, - List, - Optional, - Sequence, - Tuple, - TypedDict, - Union, -) - -from github import Github -from github.GitRelease import GitRelease - -from packaging.version import parse as parse_version, Version - -VersionComponent = Union[int, str] -Version = List[VersionComponent] - - -PatchData = TypedDict("PatchData", {"name": str, "url": str, "sha256": str, "extra": str}) -Patch = TypedDict("Patch", { - "patch": PatchData, - "version": str, - "sha256": str, -}) - - -def read_min_kernel_branch() -> List[str]: - with open(NIXPKGS_KERNEL_PATH / "kernels-org.json") as f: - return list(parse_version(sorted(json.load(f).keys())[0]).release) - - -@dataclass -class ReleaseInfo: - version: Version - release: GitRelease - - -HERE = Path(__file__).resolve().parent -NIXPKGS_KERNEL_PATH = HERE.parent -NIXPKGS_PATH = HERE.parents[4] -HARDENED_GITHUB_REPO = "anthraxx/linux-hardened" -HARDENED_TRUSTED_KEY = HERE / "anthraxx.asc" -HARDENED_PATCHES_PATH = HERE / "patches.json" -MIN_KERNEL_VERSION: Version = read_min_kernel_branch() - - -def run(*args: Union[str, Path]) -> subprocess.CompletedProcess[bytes]: - try: - return subprocess.run( - args, - check=True, - stdout=subprocess.PIPE, - stderr=subprocess.PIPE, - encoding="utf-8", - ) - except subprocess.CalledProcessError as err: - print( - f"error: `{err.cmd}` failed unexpectedly\n" - f"status code: {err.returncode}\n" - f"stdout:\n{err.stdout.strip()}\n" - f"stderr:\n{err.stderr.strip()}", - file=sys.stderr, - ) - sys.exit(1) - - -def nix_prefetch_url(url: str) -> Tuple[str, Path]: - output = run("nix-prefetch-url", "--print-path", url).stdout - sha256, path = output.strip().split("\n") - return sha256, Path(path) - - -def verify_openpgp_signature( - *, name: str, trusted_key: Path, sig_path: Path, data_path: Path, -) -> bool: - with TemporaryDirectory(suffix=".nixpkgs-gnupg-home") as gnupg_home_str: - gnupg_home = Path(gnupg_home_str) - run("gpg", "--homedir", gnupg_home, "--import", trusted_key) - keyring = gnupg_home / "pubring.kbx" - try: - subprocess.run( - ("gpgv", "--keyring", keyring, sig_path, data_path), - check=True, - stderr=subprocess.PIPE, - encoding="utf-8", - ) - return True - except subprocess.CalledProcessError as err: - print( - f"error: signature for {name} failed to verify!", - file=sys.stderr, - ) - print(err.stderr, file=sys.stderr, end="") - return False - - -def fetch_patch(*, name: str, release_info: ReleaseInfo) -> Optional[Patch]: - release = release_info.release - extra = f'-{release_info.version[-1]}' - - def find_asset(filename: str) -> str: - try: - it: Iterator[str] = ( - asset.browser_download_url - for asset in release.get_assets() - if asset.name == filename - ) - return next(it) - except StopIteration: - raise KeyError(filename) - - patch_filename = f"{name}.patch" - try: - patch_url = find_asset(patch_filename) - sig_url = find_asset(patch_filename + ".sig") - except KeyError: - print(f"error: {patch_filename}{{,.sig}} not present", file=sys.stderr) - return None - - sha256, patch_path = nix_prefetch_url(patch_url) - _, sig_path = nix_prefetch_url(sig_url) - sig_ok = verify_openpgp_signature( - name=name, - trusted_key=HARDENED_TRUSTED_KEY, - sig_path=sig_path, - data_path=patch_path, - ) - if not sig_ok: - return None - - kernel_ver = re.sub(r"(.*)(-hardened[\d]+)$", r'\1', release_info.release.tag_name) - major = kernel_ver.split('.')[0] - sha256_kernel, _ = nix_prefetch_url(f"mirror://kernel/linux/kernel/v{major}.x/linux-{kernel_ver}.tar.xz") - - return Patch( - patch=PatchData(name=patch_filename, url=patch_url, sha256=sha256, extra=extra), - version=kernel_ver, - sha256=sha256_kernel - ) - - -def parse_version(version_str: str) -> Version: - version: Version = [] - for component in re.split('\.|\-', version_str): - try: - version.append(int(component)) - except ValueError: - version.append(component) - return version - - -def version_string(version: Version) -> str: - return ".".join(str(component) for component in version) - - -def major_kernel_version_key(kernel_version: Version) -> str: - return version_string(kernel_version[:-1]) - - -def commit_patches(*, kernel_key: str, message: str) -> None: - new_patches_path = HARDENED_PATCHES_PATH.with_suffix(".new") - with open(new_patches_path, "w") as new_patches_file: - json.dump(patches, new_patches_file, indent=4, sort_keys=True) - new_patches_file.write("\n") - os.rename(new_patches_path, HARDENED_PATCHES_PATH) - message = f"linux/hardened/patches/{kernel_key}: {message}" - print(message) - if os.environ.get("COMMIT"): - run( - "git", - "-C", - NIXPKGS_PATH, - "commit", - f"--message={message}", - HARDENED_PATCHES_PATH, - ) - - -# Load the existing patches. -patches: Dict[str, Patch] -with open(HARDENED_PATCHES_PATH) as patches_file: - patches = json.load(patches_file) - -# Get the set of currently packaged kernel versions. -kernel_versions = {} -with open(NIXPKGS_KERNEL_PATH / "kernels-org.json") as kernel_versions_json: - kernel_versions = json.load(kernel_versions_json) - for kernel_branch_str in kernel_versions: - if kernel_branch_str == "testing": continue - kernel_branch = [int(i) for i in kernel_branch_str.split(".")] - if kernel_branch < MIN_KERNEL_VERSION: continue - kernel_version = [int(i) for i in kernel_versions[kernel_branch_str]["version"].split(".")] - kernel_versions[kernel_branch_str] = kernel_version - -# Remove patches for unpackaged kernel versions. -for kernel_key in sorted(patches.keys() - kernel_versions.keys()): - del patches[kernel_key] - commit_patches(kernel_key=kernel_key, message="remove") - -g = Github(os.environ.get("GITHUB_TOKEN")) -repo = g.get_repo(HARDENED_GITHUB_REPO) -failures = False - -# Match each kernel version with the best patch version. -releases = {} -i = 0 -for release in repo.get_releases(): - # Dirty workaround to make sure that we don't run into issues because - # GitHub's API only allows fetching the last 1000 releases. - # It's not reliable to exit earlier because not every kernel minor may - # have hardened patches, hence the naive search below. - i += 1 - if i > 500: - break - - version = parse_version(release.tag_name) - # needs to look like e.g. 5.6.3-hardened1 - if len(version) < 4: - continue - - if not (isinstance(version[-2], int)): - continue - - kernel_version = version[:-1] - - kernel_key = major_kernel_version_key(kernel_version) - try: - packaged_kernel_version = kernel_versions[kernel_key] - except KeyError: - continue - - release_info = ReleaseInfo(version=version, release=release) - - if kernel_version == packaged_kernel_version: - releases[kernel_key] = release_info - else: - # Fall back to the latest patch for this major kernel version, - # skipping patches for kernels newer than the packaged one. - if '.'.join(str(x) for x in kernel_version) > '.'.join(str(x) for x in packaged_kernel_version): - continue - elif ( - kernel_key not in releases or releases[kernel_key].version < version - ): - releases[kernel_key] = release_info - -# Update hardened-patches.json for each release. -for kernel_key in sorted(releases.keys()): - release_info = releases[kernel_key] - release = release_info.release - version = release_info.version - version_str = release.tag_name - name = f"linux-hardened-{version_str}" - - old_version: Optional[Version] = None - old_version_str: Optional[str] = None - update: bool - try: - old_filename = patches[kernel_key]["patch"]["name"] - old_version_str = old_filename.replace("linux-hardened-", "").replace( - ".patch", "" - ) - old_version = parse_version(old_version_str) - update = old_version < version - except KeyError: - update = True - - if update: - patch = fetch_patch(name=name, release_info=release_info) - if patch is None: - failures = True - else: - patches[kernel_key] = patch - if old_version: - message = f"{old_version_str} -> {version_str}" - else: - message = f"init at {version_str}" - commit_patches(kernel_key=kernel_key, message=message) - -missing_kernel_versions = kernel_versions.keys() - patches.keys() - -if missing_kernel_versions: - print( - f"warning: no patches for kernel versions " - + ", ".join(missing_kernel_versions), - file=sys.stderr, - ) - -if failures: - sys.exit(1) |