4 # This tool helps me to check Linux kernel options against
5 # my security hardening preferences for X86_64, ARM64, X86_32, and ARM.
6 # Let the computers do their job!
8 # Author: Alexander Popov <alex.popov@linux.com>
10 # Please don't cry if my Python code looks like C.
13 # N.B Hardening command line parameters:
14 # page_alloc.shuffle=1
15 # iommu=force (does it help against DMA attacks?)
17 # slub_debug=FZ (slow)
19 # debugfs=no-mount (or off if possible)
21 # Mitigations of CPU vulnerabilities:
23 # mitigations=auto,nosmt (nosmt is slow)
26 # spec_store_bypass_disable=on
28 # l1d_flush=on (a part of the l1tf option)
38 # sysrq_always_enabled
43 # Hardware tag-based KASAN with arm64 Memory Tagging Extension (MTE):
45 # kasan.stacktrace=off
48 # N.B. Hardening sysctls:
49 # kernel.kptr_restrict=2 (or 1?)
50 # kernel.dmesg_restrict=1 (also see the kconfig option)
51 # kernel.perf_event_paranoid=3
52 # kernel.kexec_load_disabled=1
53 # kernel.yama.ptrace_scope=3
54 # user.max_user_namespaces=0
55 # what about bpf_jit_enable?
56 # kernel.unprivileged_bpf_disabled=1
57 # net.core.bpf_jit_harden=2
58 # vm.unprivileged_userfaultfd=0
59 # (at first, it disabled unprivileged userfaultfd,
60 # and since v5.11 it enables unprivileged userfaultfd for user-mode only)
61 # dev.tty.ldisc_autoload=0
62 # fs.protected_symlinks=1
63 # fs.protected_hardlinks=1
64 # fs.protected_fifos=2
65 # fs.protected_regular=2
67 # kernel.modules_disabled=1
68 # kernel.randomize_va_space = 2
71 # pylint: disable=missing-module-docstring,missing-class-docstring,missing-function-docstring
72 # pylint: disable=line-too-long,invalid-name,too-many-branches,too-many-statements
76 from argparse import ArgumentParser
77 from collections import OrderedDict
80 from .__about__ import __version__
82 SIMPLE_OPTION_TYPES = ('kconfig', 'version', 'cmdline')
85 # Constructor without the 'expected' parameter is for option presence checks (any value is OK)
86 def __init__(self, reason, decision, name, expected=None):
87 assert(reason and decision and name), \
88 'invalid {} check for "{}"'.format(self.__class__.__name__, name)
90 self.expected = expected
91 self.decision = decision
101 # handle the option presence check
102 if self.expected is None:
103 if self.state is None:
104 self.result = 'FAIL: not present'
106 self.result = 'OK: is present'
109 # handle the option value check
110 if self.expected == self.state:
112 elif self.state is None:
113 if self.expected == 'is not set':
114 self.result = 'OK: not found'
116 self.result = 'FAIL: not found'
118 self.result = 'FAIL: "' + self.state + '"'
120 def table_print(self, _mode, with_results):
121 if self.expected is None:
124 expected = self.expected
125 print('{:<40}|{:^7}|{:^12}|{:^10}|{:^18}'.format(self.name, self.type, expected, self.decision, self.reason), end='')
127 print('| {}'.format(self.result), end='')
129 def json_dump(self, with_results):
130 dump = [self.name, self.type, self.expected, self.decision, self.reason]
132 dump.append(self.result)
136 class KconfigCheck(OptCheck):
137 def __init__(self, *args, **kwargs):
138 super().__init__(*args, **kwargs)
139 self.name = 'CONFIG_' + self.name
146 class CmdlineCheck(OptCheck):
153 def __init__(self, ver_expected):
154 self.ver_expected = ver_expected
163 if self.ver[0] > self.ver_expected[0]:
164 self.result = 'OK: version >= ' + str(self.ver_expected[0]) + '.' + str(self.ver_expected[1])
166 if self.ver[0] < self.ver_expected[0]:
167 self.result = 'FAIL: version < ' + str(self.ver_expected[0]) + '.' + str(self.ver_expected[1])
169 if self.ver[1] >= self.ver_expected[1]:
170 self.result = 'OK: version >= ' + str(self.ver_expected[0]) + '.' + str(self.ver_expected[1])
172 self.result = 'FAIL: version < ' + str(self.ver_expected[0]) + '.' + str(self.ver_expected[1])
174 def table_print(self, _mode, with_results):
175 ver_req = 'kernel version >= ' + str(self.ver_expected[0]) + '.' + str(self.ver_expected[1])
176 print('{:<91}'.format(ver_req), end='')
178 print('| {}'.format(self.result), end='')
181 class ComplexOptCheck:
182 def __init__(self, *opts):
185 'empty {} check'.format(self.__class__.__name__)
186 assert(len(self.opts) != 1), \
187 'useless {} check: {}'.format(self.__class__.__name__, opts)
188 assert(isinstance(opts[0], (KconfigCheck, CmdlineCheck))), \
189 'invalid {} check: {}'.format(self.__class__.__name__, opts)
198 return self.opts[0].name
202 return self.opts[0].expected
204 def table_print(self, mode, with_results):
205 if mode == 'verbose':
206 print(' {:87}'.format('<<< ' + self.__class__.__name__ + ' >>>'), end='')
208 print('| {}'.format(self.result), end='')
211 o.table_print(mode, with_results)
214 o.table_print(mode, False)
216 print('| {}'.format(self.result), end='')
218 def json_dump(self, with_results):
219 dump = self.opts[0].json_dump(False)
221 dump.append(self.result)
225 class OR(ComplexOptCheck):
226 # self.opts[0] is the option that this OR-check is about.
228 # OR(<X_is_hardened>, <X_is_disabled>)
229 # OR(<X_is_hardened>, <old_X_is_hardened>)
231 for i, opt in enumerate(self.opts):
233 if opt.result.startswith('OK'):
234 self.result = opt.result
235 # Add more info for additional checks:
237 if opt.result == 'OK':
238 self.result = 'OK: {} "{}"'.format(opt.name, opt.expected)
239 elif opt.result == 'OK: not found':
240 self.result = 'OK: {} not found'.format(opt.name)
241 elif opt.result == 'OK: is present':
242 self.result = 'OK: {} is present'.format(opt.name)
244 # VersionCheck provides enough info
245 assert(opt.result.startswith('OK: version')), \
246 'unexpected OK description "{}"'.format(opt.result)
248 self.result = self.opts[0].result
251 class AND(ComplexOptCheck):
252 # self.opts[0] is the option that this AND-check is about.
254 # AND(<suboption>, <main_option>)
255 # Suboption is not checked if checking of the main_option is failed.
256 # AND(<X_is_disabled>, <old_X_is_disabled>)
258 for i, opt in reversed(list(enumerate(self.opts))):
261 self.result = opt.result
263 if not opt.result.startswith('OK'):
264 # This FAIL is caused by additional checks,
265 # and not by the main option that this AND-check is about.
266 # Describe the reason of the FAIL.
267 if opt.result.startswith('FAIL: \"') or opt.result == 'FAIL: not found':
268 self.result = 'FAIL: {} not "{}"'.format(opt.name, opt.expected)
269 elif opt.result == 'FAIL: not present':
270 self.result = 'FAIL: {} not present'.format(opt.name)
272 # VersionCheck provides enough info
273 self.result = opt.result
274 assert(opt.result.startswith('FAIL: version')), \
275 'unexpected FAIL description "{}"'.format(opt.result)
279 def detect_arch(fname, archs):
280 with open(fname, 'r') as f:
281 arch_pattern = re.compile("CONFIG_[a-zA-Z0-9_]*=y")
283 for line in f.readlines():
284 if arch_pattern.match(line):
285 option, _ = line[7:].split('=', 1)
290 return None, 'more than one supported architecture is detected'
292 return None, 'failed to detect architecture'
296 def detect_version(fname):
297 with open(fname, 'r') as f:
298 ver_pattern = re.compile("# Linux/.* Kernel Configuration")
299 for line in f.readlines():
300 if ver_pattern.match(line):
304 ver_numbers = ver_str.split('.')
305 if len(ver_numbers) < 3 or not ver_numbers[0].isdigit() or not ver_numbers[1].isdigit():
306 msg = 'failed to parse the version "' + ver_str + '"'
308 return (int(ver_numbers[0]), int(ver_numbers[1])), None
309 return None, 'no kernel version detected'
312 def add_kconfig_checks(l, arch):
313 # Calling the KconfigCheck class constructor:
314 # KconfigCheck(reason, decision, name, expected)
316 modules_not_set = KconfigCheck('cut_attack_surface', 'kspp', 'MODULES', 'is not set')
317 devmem_not_set = KconfigCheck('cut_attack_surface', 'kspp', 'DEVMEM', 'is not set') # refers to LOCKDOWN
318 bpf_syscall_not_set = KconfigCheck('cut_attack_surface', 'lockdown', 'BPF_SYSCALL', 'is not set') # refers to LOCKDOWN
319 efi_not_set = KconfigCheck('cut_attack_surface', 'my', 'EFI', 'is not set')
321 # 'self_protection', 'defconfig'
322 l += [KconfigCheck('self_protection', 'defconfig', 'BUG', 'y')]
323 l += [KconfigCheck('self_protection', 'defconfig', 'SLUB_DEBUG', 'y')]
324 l += [KconfigCheck('self_protection', 'defconfig', 'GCC_PLUGINS', 'y')]
325 l += [OR(KconfigCheck('self_protection', 'defconfig', 'STACKPROTECTOR', 'y'),
326 KconfigCheck('self_protection', 'defconfig', 'CC_STACKPROTECTOR', 'y'))]
327 l += [OR(KconfigCheck('self_protection', 'defconfig', 'STACKPROTECTOR_STRONG', 'y'),
328 KconfigCheck('self_protection', 'defconfig', 'CC_STACKPROTECTOR_STRONG', 'y'))]
329 l += [OR(KconfigCheck('self_protection', 'defconfig', 'STRICT_KERNEL_RWX', 'y'),
330 KconfigCheck('self_protection', 'defconfig', 'DEBUG_RODATA', 'y'))] # before v4.11
331 l += [OR(KconfigCheck('self_protection', 'defconfig', 'STRICT_MODULE_RWX', 'y'),
332 KconfigCheck('self_protection', 'defconfig', 'DEBUG_SET_MODULE_RONX', 'y'),
333 modules_not_set)] # DEBUG_SET_MODULE_RONX was before v4.11
334 l += [OR(KconfigCheck('self_protection', 'defconfig', 'REFCOUNT_FULL', 'y'),
335 VersionCheck((5, 5)))] # REFCOUNT_FULL is enabled by default since v5.5
336 l += [KconfigCheck('self_protection', 'defconfig', 'THREAD_INFO_IN_TASK', 'y')]
337 iommu_support_is_set = KconfigCheck('self_protection', 'defconfig', 'IOMMU_SUPPORT', 'y')
338 l += [iommu_support_is_set] # is needed for mitigating DMA attacks
339 if arch in ('X86_64', 'ARM64', 'X86_32'):
340 l += [KconfigCheck('self_protection', 'defconfig', 'RANDOMIZE_BASE', 'y')]
341 if arch in ('X86_64', 'ARM64'):
342 l += [KconfigCheck('self_protection', 'defconfig', 'VMAP_STACK', 'y')]
343 if arch in ('X86_64', 'X86_32'):
344 l += [KconfigCheck('self_protection', 'defconfig', 'MICROCODE', 'y')] # is needed for mitigating CPU bugs
345 l += [KconfigCheck('self_protection', 'defconfig', 'RETPOLINE', 'y')]
346 l += [KconfigCheck('self_protection', 'defconfig', 'X86_SMAP', 'y')]
347 l += [KconfigCheck('self_protection', 'defconfig', 'SYN_COOKIES', 'y')] # another reason?
348 l += [OR(KconfigCheck('self_protection', 'defconfig', 'X86_UMIP', 'y'),
349 KconfigCheck('self_protection', 'defconfig', 'X86_INTEL_UMIP', 'y'))]
350 if arch in ('ARM64', 'ARM'):
351 l += [KconfigCheck('self_protection', 'defconfig', 'STACKPROTECTOR_PER_TASK', 'y')]
353 l += [KconfigCheck('self_protection', 'defconfig', 'PAGE_TABLE_ISOLATION', 'y')]
354 l += [KconfigCheck('self_protection', 'defconfig', 'RANDOMIZE_MEMORY', 'y')]
355 l += [AND(KconfigCheck('self_protection', 'defconfig', 'INTEL_IOMMU', 'y'),
356 iommu_support_is_set)]
357 l += [AND(KconfigCheck('self_protection', 'defconfig', 'AMD_IOMMU', 'y'),
358 iommu_support_is_set)]
360 l += [KconfigCheck('self_protection', 'defconfig', 'ARM64_PAN', 'y')]
361 l += [KconfigCheck('self_protection', 'defconfig', 'ARM64_EPAN', 'y')]
362 l += [KconfigCheck('self_protection', 'defconfig', 'UNMAP_KERNEL_AT_EL0', 'y')]
363 l += [OR(KconfigCheck('self_protection', 'defconfig', 'HARDEN_EL2_VECTORS', 'y'),
364 AND(KconfigCheck('self_protection', 'defconfig', 'RANDOMIZE_BASE', 'y'),
365 VersionCheck((5, 9))))] # HARDEN_EL2_VECTORS was included in RANDOMIZE_BASE in v5.9
366 l += [KconfigCheck('self_protection', 'defconfig', 'RODATA_FULL_DEFAULT_ENABLED', 'y')]
367 l += [KconfigCheck('self_protection', 'defconfig', 'ARM64_PTR_AUTH_KERNEL', 'y')]
368 l += [KconfigCheck('self_protection', 'defconfig', 'ARM64_BTI_KERNEL', 'y')]
369 l += [OR(KconfigCheck('self_protection', 'defconfig', 'HARDEN_BRANCH_PREDICTOR', 'y'),
370 VersionCheck((5, 10)))] # HARDEN_BRANCH_PREDICTOR is enabled by default since v5.10
371 l += [KconfigCheck('self_protection', 'defconfig', 'MITIGATE_SPECTRE_BRANCH_HISTORY', 'y')]
372 l += [KconfigCheck('self_protection', 'defconfig', 'ARM64_MTE', 'y')]
373 l += [KconfigCheck('self_protection', 'defconfig', 'RANDOMIZE_MODULE_REGION_FULL', 'y')]
375 l += [KconfigCheck('self_protection', 'defconfig', 'CPU_SW_DOMAIN_PAN', 'y')]
376 l += [KconfigCheck('self_protection', 'defconfig', 'HARDEN_BRANCH_PREDICTOR', 'y')]
377 l += [KconfigCheck('self_protection', 'defconfig', 'HARDEN_BRANCH_HISTORY', 'y')]
379 # 'self_protection', 'kspp'
380 l += [KconfigCheck('self_protection', 'kspp', 'SECURITY_DMESG_RESTRICT', 'y')]
381 l += [KconfigCheck('self_protection', 'kspp', 'BUG_ON_DATA_CORRUPTION', 'y')]
382 l += [KconfigCheck('self_protection', 'kspp', 'DEBUG_WX', 'y')]
383 l += [KconfigCheck('self_protection', 'kspp', 'SCHED_STACK_END_CHECK', 'y')]
384 l += [KconfigCheck('self_protection', 'kspp', 'SLAB_FREELIST_HARDENED', 'y')]
385 l += [KconfigCheck('self_protection', 'kspp', 'SLAB_FREELIST_RANDOM', 'y')]
386 l += [KconfigCheck('self_protection', 'kspp', 'SHUFFLE_PAGE_ALLOCATOR', 'y')]
387 l += [KconfigCheck('self_protection', 'kspp', 'FORTIFY_SOURCE', 'y')]
388 l += [KconfigCheck('self_protection', 'kspp', 'DEBUG_LIST', 'y')]
389 l += [KconfigCheck('self_protection', 'kspp', 'DEBUG_SG', 'y')]
390 l += [KconfigCheck('self_protection', 'kspp', 'DEBUG_CREDENTIALS', 'y')]
391 l += [KconfigCheck('self_protection', 'kspp', 'DEBUG_NOTIFIERS', 'y')]
392 l += [KconfigCheck('self_protection', 'kspp', 'INIT_ON_ALLOC_DEFAULT_ON', 'y')]
393 l += [KconfigCheck('self_protection', 'kspp', 'GCC_PLUGIN_LATENT_ENTROPY', 'y')]
394 l += [KconfigCheck('self_protection', 'kspp', 'KFENCE', 'y')]
395 l += [KconfigCheck('self_protection', 'kspp', 'WERROR', 'y')]
396 l += [KconfigCheck('self_protection', 'kspp', 'IOMMU_DEFAULT_DMA_STRICT', 'y')]
397 l += [KconfigCheck('self_protection', 'kspp', 'ZERO_CALL_USED_REGS', 'y')]
398 randstruct_is_set = KconfigCheck('self_protection', 'kspp', 'GCC_PLUGIN_RANDSTRUCT', 'y')
399 l += [randstruct_is_set]
400 hardened_usercopy_is_set = KconfigCheck('self_protection', 'kspp', 'HARDENED_USERCOPY', 'y')
401 l += [hardened_usercopy_is_set]
402 l += [AND(KconfigCheck('self_protection', 'kspp', 'HARDENED_USERCOPY_FALLBACK', 'is not set'),
403 hardened_usercopy_is_set)]
404 l += [AND(KconfigCheck('self_protection', 'kspp', 'HARDENED_USERCOPY_PAGESPAN', 'is not set'),
405 hardened_usercopy_is_set)]
406 l += [OR(KconfigCheck('self_protection', 'kspp', 'MODULE_SIG', 'y'),
408 l += [OR(KconfigCheck('self_protection', 'kspp', 'MODULE_SIG_ALL', 'y'),
410 l += [OR(KconfigCheck('self_protection', 'kspp', 'MODULE_SIG_SHA512', 'y'),
412 l += [OR(KconfigCheck('self_protection', 'kspp', 'MODULE_SIG_FORCE', 'y'),
413 modules_not_set)] # refers to LOCKDOWN
414 l += [OR(KconfigCheck('self_protection', 'kspp', 'INIT_STACK_ALL_ZERO', 'y'),
415 KconfigCheck('self_protection', 'kspp', 'GCC_PLUGIN_STRUCTLEAK_BYREF_ALL', 'y'))]
416 l += [OR(KconfigCheck('self_protection', 'kspp', 'INIT_ON_FREE_DEFAULT_ON', 'y'),
417 KconfigCheck('self_protection', 'kspp', 'PAGE_POISONING_ZERO', 'y'))]
418 # CONFIG_INIT_ON_FREE_DEFAULT_ON was added in v5.3.
419 # CONFIG_PAGE_POISONING_ZERO was removed in v5.11.
420 # Starting from v5.11 CONFIG_PAGE_POISONING unconditionally checks
421 # the 0xAA poison pattern on allocation.
422 # That brings higher performance penalty.
423 if arch in ('X86_64', 'ARM64', 'X86_32'):
424 stackleak_is_set = KconfigCheck('self_protection', 'kspp', 'GCC_PLUGIN_STACKLEAK', 'y')
425 l += [stackleak_is_set]
426 l += [KconfigCheck('self_protection', 'kspp', 'RANDOMIZE_KSTACK_OFFSET_DEFAULT', 'y')]
427 if arch in ('X86_64', 'X86_32'):
428 l += [KconfigCheck('self_protection', 'kspp', 'SCHED_CORE', 'y')]
429 l += [KconfigCheck('self_protection', 'kspp', 'DEFAULT_MMAP_MIN_ADDR', '65536')]
430 if arch in ('ARM64', 'ARM'):
431 l += [KconfigCheck('self_protection', 'kspp', 'DEFAULT_MMAP_MIN_ADDR', '32768')]
432 l += [KconfigCheck('self_protection', 'kspp', 'SYN_COOKIES', 'y')] # another reason?
434 l += [KconfigCheck('self_protection', 'kspp', 'ARM64_SW_TTBR0_PAN', 'y')]
436 l += [KconfigCheck('self_protection', 'kspp', 'PAGE_TABLE_ISOLATION', 'y')]
437 l += [KconfigCheck('self_protection', 'kspp', 'HIGHMEM64G', 'y')]
438 l += [KconfigCheck('self_protection', 'kspp', 'X86_PAE', 'y')]
440 # 'self_protection', 'maintainer'
441 ubsan_bounds_is_set = KconfigCheck('self_protection', 'maintainer', 'UBSAN_BOUNDS', 'y') # only array index bounds checking
442 l += [ubsan_bounds_is_set] # recommended by Kees Cook in /issues/53
443 if arch in ('X86_64', 'ARM64', 'X86_32'): # ARCH_HAS_UBSAN_SANITIZE_ALL is not enabled for ARM
444 l += [AND(KconfigCheck('self_protection', 'maintainer', 'UBSAN_SANITIZE_ALL', 'y'),
445 ubsan_bounds_is_set)] # recommended by Kees Cook in /issues/53
446 l += [AND(KconfigCheck('self_protection', 'maintainer', 'UBSAN_TRAP', 'y'),
447 ubsan_bounds_is_set)] # recommended by Kees Cook in /issues/53
449 # 'self_protection', 'clipos'
450 l += [KconfigCheck('self_protection', 'clipos', 'DEBUG_VIRTUAL', 'y')]
451 l += [KconfigCheck('self_protection', 'clipos', 'STATIC_USERMODEHELPER', 'y')] # needs userspace support
452 l += [OR(KconfigCheck('self_protection', 'clipos', 'EFI_DISABLE_PCI_DMA', 'y'),
454 l += [KconfigCheck('self_protection', 'clipos', 'SLAB_MERGE_DEFAULT', 'is not set')]
455 l += [KconfigCheck('self_protection', 'clipos', 'RANDOM_TRUST_BOOTLOADER', 'is not set')]
456 l += [KconfigCheck('self_protection', 'clipos', 'RANDOM_TRUST_CPU', 'is not set')]
457 l += [AND(KconfigCheck('self_protection', 'clipos', 'GCC_PLUGIN_RANDSTRUCT_PERFORMANCE', 'is not set'),
459 if arch in ('X86_64', 'ARM64', 'X86_32'):
460 l += [AND(KconfigCheck('self_protection', 'clipos', 'STACKLEAK_METRICS', 'is not set'),
462 l += [AND(KconfigCheck('self_protection', 'clipos', 'STACKLEAK_RUNTIME_DISABLE', 'is not set'),
464 if arch in ('X86_64', 'X86_32'):
465 l += [AND(KconfigCheck('self_protection', 'clipos', 'INTEL_IOMMU_DEFAULT_ON', 'y'),
466 iommu_support_is_set)]
468 l += [AND(KconfigCheck('self_protection', 'clipos', 'INTEL_IOMMU_SVM', 'y'),
469 iommu_support_is_set)]
471 l += [AND(KconfigCheck('self_protection', 'clipos', 'INTEL_IOMMU', 'y'),
472 iommu_support_is_set)]
474 # 'self_protection', 'my'
475 l += [OR(KconfigCheck('self_protection', 'my', 'RESET_ATTACK_MITIGATION', 'y'),
476 efi_not_set)] # needs userspace support (systemd)
478 l += [KconfigCheck('self_protection', 'my', 'SLS', 'y')] # vs CVE-2021-26341 in Straight-Line-Speculation
479 l += [AND(KconfigCheck('self_protection', 'my', 'AMD_IOMMU_V2', 'y'),
480 iommu_support_is_set)]
482 l += [KconfigCheck('self_protection', 'my', 'SHADOW_CALL_STACK', 'y')] # depends on clang, maybe it's alternative to STACKPROTECTOR_STRONG
483 l += [KconfigCheck('self_protection', 'my', 'KASAN_HW_TAGS', 'y')]
484 cfi_clang_is_set = KconfigCheck('self_protection', 'my', 'CFI_CLANG', 'y')
485 l += [cfi_clang_is_set]
486 l += [AND(KconfigCheck('self_protection', 'my', 'CFI_PERMISSIVE', 'is not set'),
490 if arch in ('X86_64', 'ARM64', 'X86_32'):
491 l += [KconfigCheck('security_policy', 'defconfig', 'SECURITY', 'y')] # and choose your favourite LSM
493 l += [KconfigCheck('security_policy', 'kspp', 'SECURITY', 'y')] # and choose your favourite LSM
494 l += [KconfigCheck('security_policy', 'kspp', 'SECURITY_YAMA', 'y')]
495 l += [KconfigCheck('security_policy', 'kspp', 'SECURITY_SELINUX_DISABLE', 'is not set')]
496 l += [KconfigCheck('security_policy', 'clipos', 'SECURITY_LOCKDOWN_LSM', 'y')]
497 l += [KconfigCheck('security_policy', 'clipos', 'SECURITY_LOCKDOWN_LSM_EARLY', 'y')]
498 l += [KconfigCheck('security_policy', 'clipos', 'LOCK_DOWN_KERNEL_FORCE_CONFIDENTIALITY', 'y')]
499 l += [KconfigCheck('security_policy', 'my', 'SECURITY_WRITABLE_HOOKS', 'is not set')] # refers to SECURITY_SELINUX_DISABLE
500 l += [KconfigCheck('security_policy', 'my', 'SECURITY_SAFESETID', 'y')]
501 loadpin_is_set = KconfigCheck('security_policy', 'my', 'SECURITY_LOADPIN', 'y')
502 l += [loadpin_is_set] # needs userspace support
503 l += [AND(KconfigCheck('security_policy', 'my', 'SECURITY_LOADPIN_ENFORCE', 'y'),
506 # 'cut_attack_surface', 'defconfig'
507 l += [OR(KconfigCheck('cut_attack_surface', 'defconfig', 'BPF_UNPRIV_DEFAULT_OFF', 'y'),
508 bpf_syscall_not_set)] # see unprivileged_bpf_disabled
509 l += [KconfigCheck('cut_attack_surface', 'defconfig', 'SECCOMP', 'y')]
510 l += [KconfigCheck('cut_attack_surface', 'defconfig', 'SECCOMP_FILTER', 'y')]
511 if arch in ('X86_64', 'ARM64', 'X86_32'):
512 l += [OR(KconfigCheck('cut_attack_surface', 'defconfig', 'STRICT_DEVMEM', 'y'),
513 devmem_not_set)] # refers to LOCKDOWN
515 # 'cut_attack_surface', 'kspp'
516 l += [KconfigCheck('cut_attack_surface', 'kspp', 'ACPI_CUSTOM_METHOD', 'is not set')] # refers to LOCKDOWN
517 l += [KconfigCheck('cut_attack_surface', 'kspp', 'COMPAT_BRK', 'is not set')]
518 l += [KconfigCheck('cut_attack_surface', 'kspp', 'DEVKMEM', 'is not set')] # refers to LOCKDOWN
519 l += [KconfigCheck('cut_attack_surface', 'kspp', 'COMPAT_VDSO', 'is not set')]
520 l += [KconfigCheck('cut_attack_surface', 'kspp', 'BINFMT_MISC', 'is not set')]
521 l += [KconfigCheck('cut_attack_surface', 'kspp', 'INET_DIAG', 'is not set')]
522 l += [KconfigCheck('cut_attack_surface', 'kspp', 'KEXEC', 'is not set')] # refers to LOCKDOWN
523 l += [KconfigCheck('cut_attack_surface', 'kspp', 'PROC_KCORE', 'is not set')] # refers to LOCKDOWN
524 l += [KconfigCheck('cut_attack_surface', 'kspp', 'LEGACY_PTYS', 'is not set')]
525 l += [KconfigCheck('cut_attack_surface', 'kspp', 'HIBERNATION', 'is not set')] # refers to LOCKDOWN
526 l += [KconfigCheck('cut_attack_surface', 'kspp', 'IA32_EMULATION', 'is not set')]
527 l += [KconfigCheck('cut_attack_surface', 'kspp', 'X86_X32', 'is not set')]
528 l += [KconfigCheck('cut_attack_surface', 'kspp', 'MODIFY_LDT_SYSCALL', 'is not set')]
529 l += [KconfigCheck('cut_attack_surface', 'kspp', 'OABI_COMPAT', 'is not set')]
530 l += [KconfigCheck('cut_attack_surface', 'kspp', 'X86_MSR', 'is not set')] # refers to LOCKDOWN
531 l += [modules_not_set]
532 l += [devmem_not_set]
533 l += [OR(KconfigCheck('cut_attack_surface', 'kspp', 'IO_STRICT_DEVMEM', 'y'),
534 devmem_not_set)] # refers to LOCKDOWN
536 l += [OR(KconfigCheck('cut_attack_surface', 'kspp', 'STRICT_DEVMEM', 'y'),
537 devmem_not_set)] # refers to LOCKDOWN
539 l += [KconfigCheck('cut_attack_surface', 'kspp', 'LEGACY_VSYSCALL_NONE', 'y')] # 'vsyscall=none'
541 # 'cut_attack_surface', 'grsec'
542 l += [KconfigCheck('cut_attack_surface', 'grsec', 'ZSMALLOC_STAT', 'is not set')]
543 l += [KconfigCheck('cut_attack_surface', 'grsec', 'PAGE_OWNER', 'is not set')]
544 l += [KconfigCheck('cut_attack_surface', 'grsec', 'DEBUG_KMEMLEAK', 'is not set')]
545 l += [KconfigCheck('cut_attack_surface', 'grsec', 'BINFMT_AOUT', 'is not set')]
546 l += [KconfigCheck('cut_attack_surface', 'grsec', 'KPROBE_EVENTS', 'is not set')]
547 l += [KconfigCheck('cut_attack_surface', 'grsec', 'UPROBE_EVENTS', 'is not set')]
548 l += [KconfigCheck('cut_attack_surface', 'grsec', 'GENERIC_TRACER', 'is not set')] # refers to LOCKDOWN
549 l += [KconfigCheck('cut_attack_surface', 'grsec', 'FUNCTION_TRACER', 'is not set')]
550 l += [KconfigCheck('cut_attack_surface', 'grsec', 'STACK_TRACER', 'is not set')]
551 l += [KconfigCheck('cut_attack_surface', 'grsec', 'HIST_TRIGGERS', 'is not set')]
552 l += [KconfigCheck('cut_attack_surface', 'grsec', 'BLK_DEV_IO_TRACE', 'is not set')]
553 l += [KconfigCheck('cut_attack_surface', 'grsec', 'PROC_VMCORE', 'is not set')]
554 l += [KconfigCheck('cut_attack_surface', 'grsec', 'PROC_PAGE_MONITOR', 'is not set')]
555 l += [KconfigCheck('cut_attack_surface', 'grsec', 'USELIB', 'is not set')]
556 l += [KconfigCheck('cut_attack_surface', 'grsec', 'CHECKPOINT_RESTORE', 'is not set')]
557 l += [KconfigCheck('cut_attack_surface', 'grsec', 'USERFAULTFD', 'is not set')]
558 l += [KconfigCheck('cut_attack_surface', 'grsec', 'HWPOISON_INJECT', 'is not set')]
559 l += [KconfigCheck('cut_attack_surface', 'grsec', 'MEM_SOFT_DIRTY', 'is not set')]
560 l += [KconfigCheck('cut_attack_surface', 'grsec', 'DEVPORT', 'is not set')] # refers to LOCKDOWN
561 l += [KconfigCheck('cut_attack_surface', 'grsec', 'DEBUG_FS', 'is not set')] # refers to LOCKDOWN
562 l += [KconfigCheck('cut_attack_surface', 'grsec', 'NOTIFIER_ERROR_INJECTION', 'is not set')]
563 l += [KconfigCheck('cut_attack_surface', 'grsec', 'FAIL_FUTEX', 'is not set')]
564 l += [KconfigCheck('cut_attack_surface', 'grsec', 'PUNIT_ATOM_DEBUG', 'is not set')]
565 l += [KconfigCheck('cut_attack_surface', 'grsec', 'ACPI_CONFIGFS', 'is not set')]
566 l += [KconfigCheck('cut_attack_surface', 'grsec', 'EDAC_DEBUG', 'is not set')]
567 l += [KconfigCheck('cut_attack_surface', 'grsec', 'DRM_I915_DEBUG', 'is not set')]
568 l += [KconfigCheck('cut_attack_surface', 'grsec', 'BCACHE_CLOSURES_DEBUG', 'is not set')]
569 l += [KconfigCheck('cut_attack_surface', 'grsec', 'DVB_C8SECTPFE', 'is not set')]
570 l += [KconfigCheck('cut_attack_surface', 'grsec', 'MTD_SLRAM', 'is not set')]
571 l += [KconfigCheck('cut_attack_surface', 'grsec', 'MTD_PHRAM', 'is not set')]
572 l += [KconfigCheck('cut_attack_surface', 'grsec', 'IO_URING', 'is not set')]
573 l += [KconfigCheck('cut_attack_surface', 'grsec', 'KCMP', 'is not set')]
574 l += [KconfigCheck('cut_attack_surface', 'grsec', 'RSEQ', 'is not set')]
575 l += [KconfigCheck('cut_attack_surface', 'grsec', 'LATENCYTOP', 'is not set')]
576 l += [KconfigCheck('cut_attack_surface', 'grsec', 'KCOV', 'is not set')]
577 l += [KconfigCheck('cut_attack_surface', 'grsec', 'PROVIDE_OHCI1394_DMA_INIT', 'is not set')]
578 l += [KconfigCheck('cut_attack_surface', 'grsec', 'SUNRPC_DEBUG', 'is not set')]
579 l += [AND(KconfigCheck('cut_attack_surface', 'grsec', 'PTDUMP_DEBUGFS', 'is not set'),
580 KconfigCheck('cut_attack_surface', 'grsec', 'X86_PTDUMP', 'is not set'))]
582 # 'cut_attack_surface', 'maintainer'
583 l += [KconfigCheck('cut_attack_surface', 'maintainer', 'DRM_LEGACY', 'is not set')] # recommended by Daniel Vetter in /issues/38
584 l += [KconfigCheck('cut_attack_surface', 'maintainer', 'FB', 'is not set')] # recommended by Daniel Vetter in /issues/38
585 l += [KconfigCheck('cut_attack_surface', 'maintainer', 'VT', 'is not set')] # recommended by Daniel Vetter in /issues/38
586 l += [KconfigCheck('cut_attack_surface', 'maintainer', 'BLK_DEV_FD', 'is not set')] # recommended by Denis Efremov in /pull/54
587 l += [KconfigCheck('cut_attack_surface', 'maintainer', 'BLK_DEV_FD_RAWCMD', 'is not set')] # recommended by Denis Efremov in /pull/62
589 # 'cut_attack_surface', 'grapheneos'
590 l += [KconfigCheck('cut_attack_surface', 'grapheneos', 'AIO', 'is not set')]
592 # 'cut_attack_surface', 'clipos'
593 l += [KconfigCheck('cut_attack_surface', 'clipos', 'STAGING', 'is not set')]
594 l += [KconfigCheck('cut_attack_surface', 'clipos', 'KSM', 'is not set')] # to prevent FLUSH+RELOAD attack
595 # l += [KconfigCheck('cut_attack_surface', 'clipos', 'IKCONFIG', 'is not set')] # no, IKCONFIG is needed for this check :)
596 l += [KconfigCheck('cut_attack_surface', 'clipos', 'KALLSYMS', 'is not set')]
597 l += [KconfigCheck('cut_attack_surface', 'clipos', 'X86_VSYSCALL_EMULATION', 'is not set')]
598 l += [KconfigCheck('cut_attack_surface', 'clipos', 'MAGIC_SYSRQ', 'is not set')]
599 l += [KconfigCheck('cut_attack_surface', 'clipos', 'KEXEC_FILE', 'is not set')] # refers to LOCKDOWN (permissive)
600 l += [KconfigCheck('cut_attack_surface', 'clipos', 'USER_NS', 'is not set')] # user.max_user_namespaces=0
601 l += [KconfigCheck('cut_attack_surface', 'clipos', 'X86_CPUID', 'is not set')]
602 l += [KconfigCheck('cut_attack_surface', 'clipos', 'X86_IOPL_IOPERM', 'is not set')] # refers to LOCKDOWN
603 l += [KconfigCheck('cut_attack_surface', 'clipos', 'ACPI_TABLE_UPGRADE', 'is not set')] # refers to LOCKDOWN
604 l += [KconfigCheck('cut_attack_surface', 'clipos', 'EFI_CUSTOM_SSDT_OVERLAYS', 'is not set')]
605 l += [AND(KconfigCheck('cut_attack_surface', 'clipos', 'LDISC_AUTOLOAD', 'is not set'),
606 KconfigCheck('cut_attack_surface', 'clipos', 'LDISC_AUTOLOAD'))] # option presence check
607 if arch in ('X86_64', 'X86_32'):
608 l += [KconfigCheck('cut_attack_surface', 'clipos', 'X86_INTEL_TSX_MODE_OFF', 'y')] # tsx=off
610 # 'cut_attack_surface', 'lockdown'
611 l += [bpf_syscall_not_set] # refers to LOCKDOWN
612 l += [KconfigCheck('cut_attack_surface', 'lockdown', 'EFI_TEST', 'is not set')] # refers to LOCKDOWN
613 l += [KconfigCheck('cut_attack_surface', 'lockdown', 'MMIOTRACE_TEST', 'is not set')] # refers to LOCKDOWN
614 l += [KconfigCheck('cut_attack_surface', 'lockdown', 'KPROBES', 'is not set')] # refers to LOCKDOWN
616 # 'cut_attack_surface', 'my'
617 l += [OR(KconfigCheck('cut_attack_surface', 'my', 'TRIM_UNUSED_KSYMS', 'y'),
619 l += [KconfigCheck('cut_attack_surface', 'my', 'MMIOTRACE', 'is not set')] # refers to LOCKDOWN (permissive)
620 l += [KconfigCheck('cut_attack_surface', 'my', 'LIVEPATCH', 'is not set')]
621 l += [KconfigCheck('cut_attack_surface', 'my', 'IP_DCCP', 'is not set')]
622 l += [KconfigCheck('cut_attack_surface', 'my', 'IP_SCTP', 'is not set')]
623 l += [KconfigCheck('cut_attack_surface', 'my', 'FTRACE', 'is not set')] # refers to LOCKDOWN
624 l += [KconfigCheck('cut_attack_surface', 'my', 'VIDEO_VIVID', 'is not set')]
625 l += [KconfigCheck('cut_attack_surface', 'my', 'INPUT_EVBUG', 'is not set')] # Can be used as a keylogger
626 l += [KconfigCheck('cut_attack_surface', 'my', 'KGDB', 'is not set')]
629 if arch in ('X86_64', 'ARM64', 'X86_32'):
630 l += [KconfigCheck('harden_userspace', 'defconfig', 'INTEGRITY', 'y')]
632 l += [KconfigCheck('harden_userspace', 'my', 'INTEGRITY', 'y')]
633 if arch in ('ARM', 'X86_32'):
634 l += [KconfigCheck('harden_userspace', 'defconfig', 'VMSPLIT_3G', 'y')]
635 if arch in ('X86_64', 'ARM64'):
636 l += [KconfigCheck('harden_userspace', 'clipos', 'ARCH_MMAP_RND_BITS', '32')]
637 if arch in ('X86_32', 'ARM'):
638 l += [KconfigCheck('harden_userspace', 'my', 'ARCH_MMAP_RND_BITS', '16')]
640 # l += [KconfigCheck('feature_test', 'my', 'LKDTM', 'm')] # only for debugging!
643 def add_cmdline_checks(l, arch):
644 # Calling the CmdlineCheck class constructor:
645 # CmdlineCheck(reason, decision, name, expected)
646 # Don't add CmdlineChecks in add_kconfig_checks() to avoid wrong results
647 # when the tool doesn't check the cmdline.
649 l += [OR(CmdlineCheck('self_protection', 'kspp', 'init_on_alloc', '1'),
650 AND(KconfigCheck('self_protection', 'kspp', 'INIT_ON_ALLOC_DEFAULT_ON', 'y'),
651 CmdlineCheck('self_protection', 'kspp', 'init_on_alloc', 'is not set')))]
652 l += [OR(CmdlineCheck('self_protection', 'kspp', 'init_on_free', '1'),
653 AND(KconfigCheck('self_protection', 'kspp', 'INIT_ON_FREE_DEFAULT_ON', 'y'),
654 CmdlineCheck('self_protection', 'kspp', 'init_on_free', 'is not set')),
655 AND(CmdlineCheck('self_protection', 'kspp', 'page_poison', '1'),
656 KconfigCheck('self_protection', 'kspp', 'PAGE_POISONING_ZERO', 'y'),
657 CmdlineCheck('self_protection', 'kspp', 'slub_debug', 'P')))]
658 l += [OR(CmdlineCheck('self_protection', 'kspp', 'slab_nomerge'),
659 AND(KconfigCheck('self_protection', 'clipos', 'SLAB_MERGE_DEFAULT', 'is not set'),
660 CmdlineCheck('self_protection', 'kspp', 'slab_merge', 'is not set')))] # option presence check
661 l += [OR(CmdlineCheck('self_protection', 'kspp', 'iommu.strict', '1'),
662 AND(KconfigCheck('self_protection', 'kspp', 'IOMMU_DEFAULT_DMA_STRICT', 'y'),
663 CmdlineCheck('self_protection', 'kspp', 'iommu.strict', 'is not set')))]
664 if arch in ('X86_64', 'ARM64', 'X86_32'):
665 l += [OR(CmdlineCheck('self_protection', 'kspp', 'randomize_kstack_offset', '1'),
666 AND(KconfigCheck('self_protection', 'kspp', 'RANDOMIZE_KSTACK_OFFSET_DEFAULT', 'y'),
667 CmdlineCheck('self_protection', 'kspp', 'randomize_kstack_offset', 'is not set')))]
668 if arch in ('X86_64', 'X86_32'):
669 l += [CmdlineCheck('self_protection', 'kspp', 'pti', 'on')]
672 l += [OR(CmdlineCheck('cut_attack_surface', 'kspp', 'vsyscall', 'none'),
673 AND(KconfigCheck('cut_attack_surface', 'kspp', 'LEGACY_VSYSCALL_NONE', 'y'),
674 CmdlineCheck('cut_attack_surface', 'kspp', 'vsyscall', 'is not set')))]
679 def print_unknown_options(checklist, parsed_options):
683 if o1.type != 'complex':
684 known_options.append(o1.name)
687 if o2.type != 'complex':
688 if hasattr(o2, 'name'):
689 known_options.append(o2.name)
692 assert(o3.type != 'complex'), \
693 'unexpected ComplexOptCheck inside {}'.format(o2.name)
694 if hasattr(o3, 'name'):
695 known_options.append(o3.name)
697 for option, value in parsed_options.items():
698 if option not in known_options:
699 print('[?] No check for option {} ({})'.format(option, value))
702 def print_checklist(mode, checklist, with_results):
706 output.append(o.json_dump(with_results))
707 print(json.dumps(output))
714 print('=' * sep_line_len)
715 print('{:^40}|{:^7}|{:^12}|{:^10}|{:^18}'.format('option name', 'type', 'desired val', 'decision', 'reason'), end='')
717 print('| {}'.format('check result'), end='')
719 print('=' * sep_line_len)
722 for opt in checklist:
724 if mode == 'show_ok':
725 if not opt.result.startswith('OK'):
727 if mode == 'show_fail':
728 if not opt.result.startswith('FAIL'):
730 opt.table_print(mode, with_results)
732 if mode == 'verbose':
733 print('-' * sep_line_len)
738 fail_count = len(list(filter(lambda opt: opt.result.startswith('FAIL'), checklist)))
740 ok_count = len(list(filter(lambda opt: opt.result.startswith('OK'), checklist)))
742 if mode == 'show_ok':
743 fail_suppressed = ' (suppressed in output)'
744 if mode == 'show_fail':
745 ok_suppressed = ' (suppressed in output)'
747 print('[+] Config check is finished: \'OK\' - {}{} / \'FAIL\' - {}{}'.format(ok_count, ok_suppressed, fail_count, fail_suppressed))
750 def populate_simple_opt_with_data(opt, data, data_type):
751 assert(opt.type != 'complex'), \
752 'unexpected ComplexOptCheck "{}"'.format(opt.name)
753 assert(opt.type in SIMPLE_OPTION_TYPES), \
754 'invalid opt type "{}"'.format(opt.type)
755 assert(data_type in SIMPLE_OPTION_TYPES), \
756 'invalid data type "{}"'.format(data_type)
758 if data_type != opt.type:
761 if data_type in ('kconfig', 'cmdline'):
762 opt.state = data.get(opt.name, None)
764 assert(data_type == 'version'), \
765 'unexpected data type "{}"'.format(data_type)
769 def populate_opt_with_data(opt, data, data_type):
770 if opt.type == 'complex':
772 if o.type == 'complex':
773 # Recursion for nested ComplexOptCheck objects
774 populate_opt_with_data(o, data, data_type)
776 populate_simple_opt_with_data(o, data, data_type)
778 assert(opt.type in ('kconfig', 'cmdline')), \
779 'bad type "{}" for a simple check'.format(opt.type)
780 populate_simple_opt_with_data(opt, data, data_type)
783 def populate_with_data(checklist, data, data_type):
784 for opt in checklist:
785 populate_opt_with_data(opt, data, data_type)
788 def perform_checks(checklist):
789 for opt in checklist:
793 def parse_kconfig_file(parsed_options, fname):
794 with open(fname, 'r') as f:
795 opt_is_on = re.compile("CONFIG_[a-zA-Z0-9_]*=[a-zA-Z0-9_\"]*")
796 opt_is_off = re.compile("# CONFIG_[a-zA-Z0-9_]* is not set")
798 for line in f.readlines():
803 if opt_is_on.match(line):
804 option, value = line.split('=', 1)
805 if value == 'is not set':
806 sys.exit('[!] ERROR: bad enabled kconfig option "{}"'.format(line))
807 elif opt_is_off.match(line):
808 option, value = line[2:].split(' ', 1)
809 if value != 'is not set':
810 sys.exit('[!] ERROR: bad disabled kconfig option "{}"'.format(line))
812 if option in parsed_options:
813 sys.exit('[!] ERROR: kconfig option "{}" exists multiple times'.format(line))
816 parsed_options[option] = value
819 def parse_cmdline_file(parsed_options, fname):
820 with open(fname, 'r') as f:
826 sys.exit('[!] ERROR: more than one line in "{}"'.format(fname))
830 name, value = opt.split('=', 1)
833 value = '' # '' is not None
834 parsed_options[name] = value
840 # - reporting about unknown kernel options in the kconfig
841 # - verbose printing of ComplexOptCheck items
842 # * json mode for printing the results in JSON format
843 report_modes = ['verbose', 'json', 'show_ok', 'show_fail']
844 supported_archs = ['X86_64', 'X86_32', 'ARM64', 'ARM']
845 parser = ArgumentParser(prog='kconfig-hardened-check',
846 description='A tool for checking the security hardening options of the Linux kernel')
847 parser.add_argument('--version', action='version', version='%(prog)s ' + __version__)
848 parser.add_argument('-p', '--print', choices=supported_archs,
849 help='print security hardening preferences for the selected architecture')
850 parser.add_argument('-c', '--config',
851 help='check the kernel kconfig file against these preferences')
852 parser.add_argument('-l', '--cmdline',
853 help='check the kernel cmdline file against these preferences')
854 parser.add_argument('-m', '--mode', choices=report_modes,
855 help='choose the report mode')
856 args = parser.parse_args()
862 print('[+] Special report mode: {}'.format(mode))
864 config_checklist = []
868 sys.exit('[!] ERROR: --config and --print can\'t be used together')
871 print('[+] Kconfig file to check: {}'.format(args.config))
873 print('[+] Kernel cmdline file to check: {}'.format(args.cmdline))
875 arch, msg = detect_arch(args.config, supported_archs)
877 sys.exit('[!] ERROR: {}'.format(msg))
879 print('[+] Detected architecture: {}'.format(arch))
881 kernel_version, msg = detect_version(args.config)
882 if not kernel_version:
883 sys.exit('[!] ERROR: {}'.format(msg))
885 print('[+] Detected kernel version: {}.{}'.format(kernel_version[0], kernel_version[1]))
887 # add relevant kconfig checks to the checklist
888 add_kconfig_checks(config_checklist, arch)
891 # add relevant cmdline checks to the checklist
892 add_cmdline_checks(config_checklist, arch)
894 # populate the checklist with the parsed kconfig data
895 parsed_kconfig_options = OrderedDict()
896 parse_kconfig_file(parsed_kconfig_options, args.config)
897 populate_with_data(config_checklist, parsed_kconfig_options, 'kconfig')
898 populate_with_data(config_checklist, kernel_version, 'version')
901 # populate the checklist with the parsed kconfig data
902 parsed_cmdline_options = OrderedDict()
903 parse_cmdline_file(parsed_cmdline_options, args.cmdline)
904 populate_with_data(config_checklist, parsed_cmdline_options, 'cmdline')
906 # now everything is ready for performing the checks
907 perform_checks(config_checklist)
909 # finally print the results
910 if mode == 'verbose':
911 print_unknown_options(config_checklist, parsed_kconfig_options)
912 print_checklist(mode, config_checklist, True)
916 sys.exit('[!] ERROR: checking cmdline doesn\'t work without checking kconfig')
919 if mode in ('show_ok', 'show_fail'):
920 sys.exit('[!] ERROR: wrong mode "{}" for --print'.format(mode))
922 add_kconfig_checks(config_checklist, arch)
923 add_cmdline_checks(config_checklist, arch)
925 print('[+] Printing kernel security hardening preferences for {}...'.format(arch))
926 print_checklist(mode, config_checklist, False)