# pti=on
# spec_store_bypass_disable=on
# l1tf=full,force
+# l1d_flush=on (a part of the l1tf option)
# mds=full,nosmt
# tsx=off
-# l1d_flush=on
# ARM64:
# kpti=on
# ssbd=force-on
def type(self):
return 'kconfig'
+ def json_dump(self, with_results):
+ dump = [self.name, self.type, self.expected, self.decision, self.reason]
+ if with_results:
+ dump.append(self.result)
+ return dump
+
class VersionCheck:
def __init__(self, ver_expected):
if with_results:
print('| {}'.format(self.result), end='')
+ def json_dump(self, with_results):
+ dump = self.opts[0].json_dump(False)
+ if with_results:
+ dump.append(self.result)
+ return dump
+
class OR(ComplexOptCheck):
# self.opts[0] is the option that this OR-check is about.
modules_not_set = KconfigCheck('cut_attack_surface', 'kspp', 'MODULES', 'is not set')
devmem_not_set = KconfigCheck('cut_attack_surface', 'kspp', 'DEVMEM', 'is not set') # refers to LOCKDOWN
+ efi_not_set = KconfigCheck('cut_attack_surface', 'my', 'EFI', 'is not set')
# 'self_protection', 'defconfig'
l += [KconfigCheck('self_protection', 'defconfig', 'BUG', 'y')]
modules_not_set)] # DEBUG_SET_MODULE_RONX was before v4.11
l += [OR(KconfigCheck('self_protection', 'defconfig', 'REFCOUNT_FULL', 'y'),
VersionCheck((5, 5)))] # REFCOUNT_FULL is enabled by default since v5.5
+ l += [KconfigCheck('self_protection', 'defconfig', 'THREAD_INFO_IN_TASK', 'y')]
iommu_support_is_set = KconfigCheck('self_protection', 'defconfig', 'IOMMU_SUPPORT', 'y')
l += [iommu_support_is_set] # is needed for mitigating DMA attacks
if arch in ('X86_64', 'ARM64', 'X86_32'):
l += [KconfigCheck('self_protection', 'defconfig', 'RANDOMIZE_BASE', 'y')]
- l += [KconfigCheck('self_protection', 'defconfig', 'THREAD_INFO_IN_TASK', 'y')]
if arch in ('X86_64', 'ARM64'):
l += [KconfigCheck('self_protection', 'defconfig', 'VMAP_STACK', 'y')]
if arch in ('X86_64', 'X86_32'):
l += [KconfigCheck('self_protection', 'defconfig', 'ARM64_BTI_KERNEL', 'y')]
l += [OR(KconfigCheck('self_protection', 'defconfig', 'HARDEN_BRANCH_PREDICTOR', 'y'),
VersionCheck((5, 10)))] # HARDEN_BRANCH_PREDICTOR is enabled by default since v5.10
+ l += [KconfigCheck('self_protection', 'defconfig', 'MITIGATE_SPECTRE_BRANCH_HISTORY', 'y')]
l += [KconfigCheck('self_protection', 'defconfig', 'ARM64_MTE', 'y')]
if arch == 'ARM':
l += [KconfigCheck('self_protection', 'defconfig', 'CPU_SW_DOMAIN_PAN', 'y')]
# 'self_protection', 'clipos'
l += [KconfigCheck('self_protection', 'clipos', 'DEBUG_VIRTUAL', 'y')]
l += [KconfigCheck('self_protection', 'clipos', 'STATIC_USERMODEHELPER', 'y')] # needs userspace support
- l += [KconfigCheck('self_protection', 'clipos', 'EFI_DISABLE_PCI_DMA', 'y')]
+ l += [OR(KconfigCheck('self_protection', 'clipos', 'EFI_DISABLE_PCI_DMA', 'y'),
+ efi_not_set)]
l += [KconfigCheck('self_protection', 'clipos', 'SLAB_MERGE_DEFAULT', 'is not set')] # slab_nomerge
l += [KconfigCheck('self_protection', 'clipos', 'RANDOM_TRUST_BOOTLOADER', 'is not set')]
l += [KconfigCheck('self_protection', 'clipos', 'RANDOM_TRUST_CPU', 'is not set')]
iommu_support_is_set)]
# 'self_protection', 'my'
- l += [KconfigCheck('self_protection', 'my', 'RESET_ATTACK_MITIGATION', 'y')] # needs userspace support (systemd)
+ l += [OR(KconfigCheck('self_protection', 'my', 'RESET_ATTACK_MITIGATION', 'y'),
+ efi_not_set)] # needs userspace support (systemd)
if arch == 'X86_64':
+ l += [KconfigCheck('self_protection', 'my', 'SLS', 'y')] # vs CVE-2021-26341 in Straight-Line-Speculation
l += [AND(KconfigCheck('self_protection', 'my', 'AMD_IOMMU_V2', 'y'),
iommu_support_is_set)]
if arch == 'ARM64':
loadpin_is_set)]
# 'cut_attack_surface', 'defconfig'
+ l += [KconfigCheck('cut_attack_surface', 'defconfig', 'BPF_UNPRIV_DEFAULT_OFF', 'y')] # see unprivileged_bpf_disabled
l += [KconfigCheck('cut_attack_surface', 'defconfig', 'SECCOMP', 'y')]
l += [KconfigCheck('cut_attack_surface', 'defconfig', 'SECCOMP_FILTER', 'y')]
if arch in ('X86_64', 'ARM64', 'X86_32'):
known_options = []
for o1 in checklist:
- if not hasattr(o1, 'opts'):
+ if o1.type != 'complex':
known_options.append(o1.name)
continue
for o2 in o1.opts:
- if not hasattr(o2, 'opts'):
+ if o2.type != 'complex':
if hasattr(o2, 'name'):
known_options.append(o2.name)
continue
for o3 in o2.opts:
- if hasattr(o3, 'opts'):
+ if o3.type == 'complex':
sys.exit('[!] ERROR: unexpected ComplexOptCheck inside {}'.format(o2.name))
if hasattr(o3, 'name'):
known_options.append(o3.name)
def print_checklist(mode, checklist, with_results):
if mode == 'json':
- opts = []
+ output = []
for o in checklist:
- opt = [o.name, o.type, o.expected, o.decision, o.reason]
- if with_results:
- opt.append(o.result)
- opts.append(opt)
- print(json.dumps(opts))
+ output.append(o.json_dump(with_results))
+ print(json.dumps(output))
return
# table header
def populate_simple_opt_with_data(opt, data, data_type):
- if hasattr(opt, 'opts'):
+ if opt.type == 'complex':
sys.exit('[!] ERROR: unexpected ComplexOptCheck {}: {}'.format(opt.name, vars(opt)))
if data_type not in TYPES_OF_CHECKS:
sys.exit('[!] ERROR: invalid data type "{}"'.format(data_type))
+
if data_type != opt.type:
return
+
if data_type == 'kconfig':
opt.state = data.get(opt.name, None)
elif data_type == 'version':
def populate_opt_with_data(opt, data, data_type):
- if hasattr(opt, 'opts'):
+ if opt.type == 'complex':
for o in opt.opts:
- if hasattr(o, 'opts'):
+ if o.type == 'complex':
# Recursion for nested ComplexOptCheck objects
populate_opt_with_data(o, data, data_type)
else:
populate_simple_opt_with_data(o, data, data_type)
else:
- # The 'state' is mandatory for simple checks
- if not hasattr(opt, 'state'):
- sys.exit('[!] ERROR: bad simple check {}'.format(vars(opt)))
+ if opt.type != 'kconfig':
+ sys.exit('[!] ERROR: bad type "{}" for a simple check {}'.format(opt.type, opt.name))
populate_simple_opt_with_data(opt, data, data_type)
projects / kconfig-hardened-check.git / blobdiff