# Please don't cry if my Python code looks like C.
#
#
-# N.B Hardening command line parameters:
-# iommu=force (does it help against DMA attacks?)
-#
-# Mitigations of CPU vulnerabilities:
-# Аrch-independent:
-# X86:
-# spec_store_bypass_disable=on
-# l1tf=full,force
-# l1d_flush=on (a part of the l1tf option)
-# mds=full,nosmt
-# tsx=off
-# ARM64:
-# kpti=on
-# ssbd=force-on
-#
-# Should NOT be set:
-# sysrq_always_enabled
-# arm64.nobti
-# arm64.nopauth
-# arm64.nomte
-#
-# Hardware tag-based KASAN with arm64 Memory Tagging Extension (MTE):
-# kasan=on
-# kasan.stacktrace=off
-# kasan.fault=panic
-#
# N.B. Hardening sysctls:
# kernel.kptr_restrict=2 (or 1?)
# kernel.dmesg_restrict=1 (also see the kconfig option)
-# kernel.perf_event_paranoid=3
+# kernel.perf_event_paranoid=2 (or 3 with a custom patch, see https://lwn.net/Articles/696216/)
# kernel.kexec_load_disabled=1
# kernel.yama.ptrace_scope=3
# user.max_user_namespaces=0
# fs.suid_dumpable=0
# kernel.modules_disabled=1
# kernel.randomize_va_space = 2
+# nosmt sysfs control file
# pylint: disable=missing-module-docstring,missing-class-docstring,missing-function-docstring
'invalid expected value "{}" for "{}" check (1)'.format(expected, name)
val_len = len(expected.split())
if val_len == 3:
- assert(expected == 'is not set' or expected == 'is not off'), \
+ assert(expected in ('is not set', 'is not off')), \
'invalid expected value "{}" for "{}" check (2)'.format(expected, name)
elif val_len == 2:
assert(expected == 'is present'), \
if self.expected == 'is not off':
if self.state == 'off':
self.result = 'FAIL: is off'
+ if self.state == '0':
+ self.result = 'FAIL: is off, "0"'
elif self.state is None:
self.result = 'FAIL: is off, not found'
else:
self.result = 'FAIL: {} is not "{}"'.format(opt.name, opt.expected)
elif opt.result == 'FAIL: is not present':
self.result = 'FAIL: {} is not present'.format(opt.name)
- elif opt.result == 'FAIL: is off':
+ elif opt.result in ('FAIL: is off', 'FAIL: is off, "0"'):
self.result = 'FAIL: {} is off'.format(opt.name)
elif opt.result == 'FAIL: is off, not found':
self.result = 'FAIL: {} is off, not found'.format(opt.name)
# 'self_protection', 'defconfig'
l += [KconfigCheck('self_protection', 'defconfig', 'BUG', 'y')]
l += [KconfigCheck('self_protection', 'defconfig', 'SLUB_DEBUG', 'y')]
+ l += [KconfigCheck('self_protection', 'defconfig', 'THREAD_INFO_IN_TASK', 'y')]
gcc_plugins_support_is_set = KconfigCheck('self_protection', 'defconfig', 'GCC_PLUGINS', 'y')
l += [gcc_plugins_support_is_set]
+ iommu_support_is_set = KconfigCheck('self_protection', 'defconfig', 'IOMMU_SUPPORT', 'y')
+ l += [iommu_support_is_set] # is needed for mitigating DMA attacks
l += [OR(KconfigCheck('self_protection', 'defconfig', 'STACKPROTECTOR', 'y'),
KconfigCheck('self_protection', 'defconfig', 'CC_STACKPROTECTOR', 'y'),
KconfigCheck('self_protection', 'defconfig', 'CC_STACKPROTECTOR_REGULAR', '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')]
- if arch in ('X86_64', 'ARM64'):
+ if arch in ('X86_64', 'ARM64', 'ARM'):
l += [KconfigCheck('self_protection', 'defconfig', 'VMAP_STACK', 'y')]
if arch in ('X86_64', 'X86_32'):
+ l += [KconfigCheck('self_protection', 'defconfig', 'DEBUG_WX', 'y')]
+ l += [KconfigCheck('self_protection', 'defconfig', 'WERROR', 'y')]
l += [KconfigCheck('self_protection', 'defconfig', 'X86_MCE', 'y')]
l += [KconfigCheck('self_protection', 'defconfig', 'X86_MCE_INTEL', 'y')]
l += [KconfigCheck('self_protection', 'defconfig', 'X86_MCE_AMD', 'y')]
l += [KconfigCheck('self_protection', 'defconfig', 'MICROCODE', 'y')] # is needed for mitigating CPU bugs
l += [KconfigCheck('self_protection', 'defconfig', 'RETPOLINE', 'y')]
+ l += [KconfigCheck('self_protection', 'defconfig', 'SYN_COOKIES', 'y')] # another reason?
l += [OR(KconfigCheck('self_protection', 'defconfig', 'X86_SMAP', 'y'),
VersionCheck((5, 19)))] # X86_SMAP is enabled by default since v5.19
- l += [KconfigCheck('self_protection', 'defconfig', 'SYN_COOKIES', 'y')] # another reason?
l += [OR(KconfigCheck('self_protection', 'defconfig', 'X86_UMIP', 'y'),
KconfigCheck('self_protection', 'defconfig', 'X86_INTEL_UMIP', 'y'))]
if arch in ('ARM64', 'ARM'):
+ l += [KconfigCheck('self_protection', 'defconfig', 'IOMMU_DEFAULT_DMA_STRICT', 'y')]
+ l += [KconfigCheck('self_protection', 'defconfig', 'IOMMU_DEFAULT_PASSTHROUGH', 'is not set')] # true if IOMMU_DEFAULT_DMA_STRICT is set
l += [KconfigCheck('self_protection', 'defconfig', 'STACKPROTECTOR_PER_TASK', 'y')]
if arch == 'X86_64':
l += [KconfigCheck('self_protection', 'defconfig', 'PAGE_TABLE_ISOLATION', 'y')]
l += [KconfigCheck('self_protection', 'defconfig', 'ARM64_EPAN', 'y')]
l += [KconfigCheck('self_protection', 'defconfig', 'UNMAP_KERNEL_AT_EL0', 'y')]
l += [KconfigCheck('self_protection', 'defconfig', 'ARM64_E0PD', 'y')]
- l += [OR(KconfigCheck('self_protection', 'defconfig', 'HARDEN_EL2_VECTORS', 'y'),
- AND(KconfigCheck('self_protection', 'defconfig', 'RANDOMIZE_BASE', 'y'),
- VersionCheck((5, 9))))] # HARDEN_EL2_VECTORS was included in RANDOMIZE_BASE in v5.9
l += [KconfigCheck('self_protection', 'defconfig', 'RODATA_FULL_DEFAULT_ENABLED', 'y')]
l += [KconfigCheck('self_protection', 'defconfig', 'ARM64_PTR_AUTH_KERNEL', 'y')]
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')]
l += [KconfigCheck('self_protection', 'defconfig', 'RANDOMIZE_MODULE_REGION_FULL', 'y')]
+ l += [OR(KconfigCheck('self_protection', 'defconfig', 'HARDEN_EL2_VECTORS', 'y'),
+ AND(KconfigCheck('self_protection', 'defconfig', 'RANDOMIZE_BASE', 'y'),
+ VersionCheck((5, 9))))] # HARDEN_EL2_VECTORS was included in RANDOMIZE_BASE in v5.9
+ l += [OR(KconfigCheck('self_protection', 'defconfig', 'HARDEN_BRANCH_PREDICTOR', 'y'),
+ VersionCheck((5, 10)))] # HARDEN_BRANCH_PREDICTOR is enabled by default since v5.10
if arch == 'ARM':
l += [KconfigCheck('self_protection', 'defconfig', 'CPU_SW_DOMAIN_PAN', 'y')]
l += [KconfigCheck('self_protection', 'defconfig', 'HARDEN_BRANCH_PREDICTOR', 'y')]
# 'self_protection', 'kspp'
l += [KconfigCheck('self_protection', 'kspp', 'BUG_ON_DATA_CORRUPTION', 'y')]
- l += [KconfigCheck('self_protection', 'kspp', 'DEBUG_WX', 'y')]
l += [KconfigCheck('self_protection', 'kspp', 'SCHED_STACK_END_CHECK', 'y')]
l += [KconfigCheck('self_protection', 'kspp', 'SLAB_FREELIST_HARDENED', 'y')]
l += [KconfigCheck('self_protection', 'kspp', 'SLAB_FREELIST_RANDOM', 'y')]
l += [KconfigCheck('self_protection', 'kspp', 'DEBUG_CREDENTIALS', 'y')]
l += [KconfigCheck('self_protection', 'kspp', 'DEBUG_NOTIFIERS', 'y')]
l += [KconfigCheck('self_protection', 'kspp', 'INIT_ON_ALLOC_DEFAULT_ON', 'y')]
- l += [AND(KconfigCheck('self_protection', 'kspp', 'GCC_PLUGIN_LATENT_ENTROPY', 'y'),
- gcc_plugins_support_is_set)]
l += [KconfigCheck('self_protection', 'kspp', 'KFENCE', 'y')]
- l += [KconfigCheck('self_protection', 'kspp', 'WERROR', 'y')]
- l += [KconfigCheck('self_protection', 'kspp', 'IOMMU_DEFAULT_DMA_STRICT', 'y')]
- l += [KconfigCheck('self_protection', 'kspp', 'IOMMU_DEFAULT_PASSTHROUGH', 'is not set')] # true if IOMMU_DEFAULT_DMA_STRICT is set
l += [KconfigCheck('self_protection', 'kspp', 'ZERO_CALL_USED_REGS', 'y')]
l += [KconfigCheck('self_protection', 'kspp', 'HW_RANDOM_TPM', 'y')]
l += [KconfigCheck('self_protection', 'kspp', 'STATIC_USERMODEHELPER', 'y')] # needs userspace support
- l += [KconfigCheck('self_protection', 'kspp', 'SCHED_CORE', 'y')]
randstruct_is_set = OR(KconfigCheck('self_protection', 'kspp', 'RANDSTRUCT_FULL', 'y'),
KconfigCheck('self_protection', 'kspp', 'GCC_PLUGIN_RANDSTRUCT', 'y'))
l += [randstruct_is_set]
hardened_usercopy_is_set)]
l += [AND(KconfigCheck('self_protection', 'kspp', 'HARDENED_USERCOPY_PAGESPAN', 'is not set'),
hardened_usercopy_is_set)]
+ l += [AND(KconfigCheck('self_protection', 'kspp', 'GCC_PLUGIN_LATENT_ENTROPY', 'y'),
+ gcc_plugins_support_is_set)]
l += [OR(KconfigCheck('self_protection', 'kspp', 'MODULE_SIG', 'y'),
modules_not_set)]
l += [OR(KconfigCheck('self_protection', 'kspp', 'MODULE_SIG_ALL', 'y'),
l += [AND(KconfigCheck('self_protection', 'kspp', 'CFI_PERMISSIVE', 'is not set'),
cfi_clang_is_set)]
if arch in ('X86_64', 'X86_32'):
+ l += [KconfigCheck('self_protection', 'kspp', 'SCHED_CORE', 'y')]
l += [KconfigCheck('self_protection', 'kspp', 'DEFAULT_MMAP_MIN_ADDR', '65536')]
+ l += [KconfigCheck('self_protection', 'kspp', 'IOMMU_DEFAULT_DMA_STRICT', 'y')]
+ l += [KconfigCheck('self_protection', 'kspp', 'IOMMU_DEFAULT_PASSTHROUGH', 'is not set')] # true if IOMMU_DEFAULT_DMA_STRICT is set
l += [AND(KconfigCheck('self_protection', 'kspp', 'INTEL_IOMMU_DEFAULT_ON', 'y'),
iommu_support_is_set)]
if arch in ('ARM64', 'ARM'):
+ l += [KconfigCheck('self_protection', 'kspp', 'DEBUG_WX', 'y')]
+ l += [KconfigCheck('self_protection', 'kspp', 'WERROR', 'y')]
l += [KconfigCheck('self_protection', 'kspp', 'DEFAULT_MMAP_MIN_ADDR', '32768')]
l += [KconfigCheck('self_protection', 'kspp', 'SYN_COOKIES', 'y')] # another reason?
if arch == 'X86_64':
if arch == 'ARM64':
l += [KconfigCheck('self_protection', 'kspp', 'ARM64_SW_TTBR0_PAN', 'y')]
l += [KconfigCheck('self_protection', 'kspp', 'SHADOW_CALL_STACK', 'y')]
- l += [KconfigCheck('self_protection', 'kspp', 'KASAN_HW_TAGS', 'y')]
+ l += [KconfigCheck('self_protection', 'kspp', 'KASAN_HW_TAGS', 'y')] # see also: kasan=on, kasan.stacktrace=off, kasan.fault=panic
if arch == 'X86_32':
l += [KconfigCheck('self_protection', 'kspp', 'PAGE_TABLE_ISOLATION', 'y')]
l += [KconfigCheck('self_protection', 'kspp', 'HIGHMEM64G', 'y')]
l += [KconfigCheck('security_policy', 'kspp', 'SECURITY_WRITABLE_HOOKS', 'is not set')] # refers to SECURITY_SELINUX_DISABLE
# 'cut_attack_surface', 'defconfig'
- l += [OR(KconfigCheck('cut_attack_surface', 'defconfig', 'BPF_UNPRIV_DEFAULT_OFF', 'y'),
- bpf_syscall_not_set)] # see unprivileged_bpf_disabled
l += [KconfigCheck('cut_attack_surface', 'defconfig', 'SECCOMP', 'y')]
l += [KconfigCheck('cut_attack_surface', 'defconfig', 'SECCOMP_FILTER', 'y')]
+ l += [OR(KconfigCheck('cut_attack_surface', 'defconfig', 'BPF_UNPRIV_DEFAULT_OFF', 'y'),
+ bpf_syscall_not_set)] # see unprivileged_bpf_disabled
if arch in ('X86_64', 'ARM64', 'X86_32'):
l += [OR(KconfigCheck('cut_attack_surface', 'defconfig', 'STRICT_DEVMEM', 'y'),
devmem_not_set)] # refers to LOCKDOWN
+ if arch in ('X86_64', 'X86_32'):
+ l += [KconfigCheck('cut_attack_surface', 'defconfig', 'X86_INTEL_TSX_MODE_OFF', 'y')] # tsx=off
# 'cut_attack_surface', 'kspp'
l += [KconfigCheck('cut_attack_surface', 'kspp', 'SECURITY_DMESG_RESTRICT', 'y')]
l += [KconfigCheck('cut_attack_surface', 'kspp', 'PROC_KCORE', 'is not set')] # refers to LOCKDOWN
l += [KconfigCheck('cut_attack_surface', 'kspp', 'LEGACY_PTYS', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'kspp', 'HIBERNATION', 'is not set')] # refers to LOCKDOWN
+ l += [KconfigCheck('cut_attack_surface', 'kspp', 'COMPAT', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'kspp', 'IA32_EMULATION', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'kspp', 'X86_X32', 'is not set')]
+ l += [KconfigCheck('cut_attack_surface', 'kspp', 'X86_X32_ABI', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'kspp', 'MODIFY_LDT_SYSCALL', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'kspp', 'OABI_COMPAT', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'kspp', 'X86_MSR', 'is not set')] # refers to LOCKDOWN
devmem_not_set)] # refers to LOCKDOWN
l += [AND(KconfigCheck('cut_attack_surface', 'kspp', 'LDISC_AUTOLOAD', 'is not set'),
KconfigCheck('cut_attack_surface', 'kspp', 'LDISC_AUTOLOAD', 'is present'))]
+ if arch == 'X86_64':
+ l += [KconfigCheck('cut_attack_surface', 'kspp', 'LEGACY_VSYSCALL_NONE', 'y')] # 'vsyscall=none'
if arch == 'ARM':
l += [OR(KconfigCheck('cut_attack_surface', 'kspp', 'STRICT_DEVMEM', 'y'),
devmem_not_set)] # refers to LOCKDOWN
- if arch == 'X86_64':
- l += [KconfigCheck('cut_attack_surface', 'kspp', 'LEGACY_VSYSCALL_NONE', 'y')] # 'vsyscall=none'
# 'cut_attack_surface', 'grsec'
l += [KconfigCheck('cut_attack_surface', 'grsec', 'ZSMALLOC_STAT', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'maintainer', 'VT', 'is not set')] # recommended by Daniel Vetter in /issues/38
l += [KconfigCheck('cut_attack_surface', 'maintainer', 'BLK_DEV_FD', 'is not set')] # recommended by Denis Efremov in /pull/54
l += [KconfigCheck('cut_attack_surface', 'maintainer', 'BLK_DEV_FD_RAWCMD', 'is not set')] # recommended by Denis Efremov in /pull/62
-
- # 'cut_attack_surface', 'grapheneos'
- l += [KconfigCheck('cut_attack_surface', 'grapheneos', 'AIO', 'is not set')]
+ l += [KconfigCheck('cut_attack_surface', 'maintainer', 'NOUVEAU_LEGACY_CTX_SUPPORT', 'is not set')]
+ # recommended by Dave Airlie in kernel commit b30a43ac7132cdda
# 'cut_attack_surface', 'clipos'
l += [KconfigCheck('cut_attack_surface', 'clipos', 'STAGING', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'clipos', 'KSM', 'is not set')] # to prevent FLUSH+RELOAD attack
-# l += [KconfigCheck('cut_attack_surface', 'clipos', 'IKCONFIG', 'is not set')] # no, IKCONFIG is needed for this check :)
l += [KconfigCheck('cut_attack_surface', 'clipos', 'KALLSYMS', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'clipos', 'X86_VSYSCALL_EMULATION', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'clipos', 'MAGIC_SYSRQ', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'clipos', 'ACPI_TABLE_UPGRADE', 'is not set')] # refers to LOCKDOWN
l += [KconfigCheck('cut_attack_surface', 'clipos', 'EFI_CUSTOM_SSDT_OVERLAYS', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'clipos', 'COREDUMP', 'is not set')] # cut userspace attack surface
- if arch in ('X86_64', 'X86_32'):
- l += [KconfigCheck('cut_attack_surface', 'clipos', 'X86_INTEL_TSX_MODE_OFF', 'y')] # tsx=off
+# l += [KconfigCheck('cut_attack_surface', 'clipos', 'IKCONFIG', 'is not set')] # no, IKCONFIG is needed for this check :)
# 'cut_attack_surface', 'lockdown'
- l += [bpf_syscall_not_set] # refers to LOCKDOWN
l += [KconfigCheck('cut_attack_surface', 'lockdown', 'EFI_TEST', 'is not set')] # refers to LOCKDOWN
l += [KconfigCheck('cut_attack_surface', 'lockdown', 'MMIOTRACE_TEST', 'is not set')] # refers to LOCKDOWN
l += [KconfigCheck('cut_attack_surface', 'lockdown', 'KPROBES', 'is not set')] # refers to LOCKDOWN
+ l += [bpf_syscall_not_set] # refers to LOCKDOWN
# 'cut_attack_surface', 'my'
- l += [OR(KconfigCheck('cut_attack_surface', 'my', 'TRIM_UNUSED_KSYMS', 'y'),
- modules_not_set)]
l += [KconfigCheck('cut_attack_surface', 'my', 'MMIOTRACE', 'is not set')] # refers to LOCKDOWN (permissive)
l += [KconfigCheck('cut_attack_surface', 'my', 'LIVEPATCH', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'my', 'IP_DCCP', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'my', 'VIDEO_VIVID', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'my', 'INPUT_EVBUG', 'is not set')] # Can be used as a keylogger
l += [KconfigCheck('cut_attack_surface', 'my', 'KGDB', 'is not set')]
+ l += [KconfigCheck('cut_attack_surface', 'my', 'AIO', 'is not set')]
+ l += [OR(KconfigCheck('cut_attack_surface', 'my', 'TRIM_UNUSED_KSYMS', 'y'),
+ modules_not_set)]
# 'harden_userspace'
if arch in ('X86_64', 'ARM64', 'X86_32'):
l += [CmdlineCheck('self_protection', 'defconfig', 'nopti', 'is not set')]
l += [CmdlineCheck('self_protection', 'defconfig', 'nospectre_v1', 'is not set')]
l += [CmdlineCheck('self_protection', 'defconfig', 'nospectre_v2', 'is not set')]
- l += [OR(CmdlineCheck('self_protection', 'defconfig', 'mitigations', 'is not off'),
- CmdlineCheck('self_protection', 'defconfig', 'mitigations', 'is not set'))]
+ l += [CmdlineCheck('self_protection', 'defconfig', 'nospectre_bhb', 'is not set')]
+ l += [CmdlineCheck('self_protection', 'defconfig', 'nospec_store_bypass_disable', 'is not set')]
+ l += [CmdlineCheck('self_protection', 'defconfig', 'arm64.nobti', 'is not set')]
+ l += [CmdlineCheck('self_protection', 'defconfig', 'arm64.nopauth', 'is not set')]
+ l += [CmdlineCheck('self_protection', 'defconfig', 'arm64.nomte', 'is not set')]
+ l += [OR(CmdlineCheck('self_protection', 'defconfig', 'spectre_v2', 'is not off'),
+ CmdlineCheck('self_protection', 'defconfig', 'spectre_v2', 'is not set'))]
+ l += [OR(CmdlineCheck('self_protection', 'defconfig', 'spectre_v2_user', 'is not off'),
+ CmdlineCheck('self_protection', 'defconfig', 'spectre_v2_user', 'is not set'))]
+ l += [OR(CmdlineCheck('self_protection', 'defconfig', 'spec_store_bypass_disable', 'is not off'),
+ CmdlineCheck('self_protection', 'defconfig', 'spec_store_bypass_disable', 'is not set'))]
+ l += [OR(CmdlineCheck('self_protection', 'defconfig', 'l1tf', 'is not off'),
+ CmdlineCheck('self_protection', 'defconfig', 'l1tf', 'is not set'))]
+ l += [OR(CmdlineCheck('self_protection', 'defconfig', 'mds', 'is not off'),
+ CmdlineCheck('self_protection', 'defconfig', 'mds', 'is not set'))]
+ l += [OR(CmdlineCheck('self_protection', 'defconfig', 'tsx_async_abort', 'is not off'),
+ CmdlineCheck('self_protection', 'defconfig', 'tsx_async_abort', 'is not set'))]
+ l += [OR(CmdlineCheck('self_protection', 'defconfig', 'srbds', 'is not off'),
+ CmdlineCheck('self_protection', 'defconfig', 'srbds', 'is not set'))]
+ l += [OR(CmdlineCheck('self_protection', 'defconfig', 'mmio_stale_data', 'is not off'),
+ CmdlineCheck('self_protection', 'defconfig', 'mmio_stale_data', 'is not set'))]
+ l += [OR(CmdlineCheck('self_protection', 'defconfig', 'retbleed', 'is not off'),
+ CmdlineCheck('self_protection', 'defconfig', 'retbleed', 'is not set'))]
+ l += [OR(CmdlineCheck('self_protection', 'defconfig', 'kpti', 'is not off'),
+ CmdlineCheck('self_protection', 'defconfig', 'kpti', 'is not set'))]
+ l += [OR(CmdlineCheck('self_protection', 'defconfig', 'kvm.nx_huge_pages', 'is not off'),
+ CmdlineCheck('self_protection', 'defconfig', 'kvm.nx_huge_pages', 'is not set'))]
if arch == 'ARM64':
+ l += [OR(CmdlineCheck('self_protection', 'defconfig', 'ssbd', 'kernel'),
+ CmdlineCheck('self_protection', 'my', 'ssbd', 'force-on'),
+ CmdlineCheck('self_protection', 'defconfig', 'ssbd', 'is not set'))]
l += [OR(CmdlineCheck('self_protection', 'defconfig', 'rodata', 'full'),
AND(KconfigCheck('self_protection', 'defconfig', 'RODATA_FULL_DEFAULT_ENABLED', 'y'),
CmdlineCheck('self_protection', 'defconfig', 'rodata', 'is not set')))]
# 'self_protection', 'kspp'
l += [CmdlineCheck('self_protection', 'kspp', 'nosmt', 'is present')]
+ l += [CmdlineCheck('self_protection', 'kspp', 'mitigations', 'auto,nosmt')] # 'nosmt' by kspp + 'auto' by defconfig
l += [OR(CmdlineCheck('self_protection', 'kspp', 'init_on_alloc', '1'),
AND(KconfigCheck('self_protection', 'kspp', 'INIT_ON_ALLOC_DEFAULT_ON', 'y'),
CmdlineCheck('self_protection', 'kspp', 'init_on_alloc', 'is not set')))]
CmdlineCheck('self_protection', 'kspp', 'slub_debug', 'P')))]
l += [OR(CmdlineCheck('self_protection', 'kspp', 'slab_nomerge', 'is present'),
AND(KconfigCheck('self_protection', 'clipos', 'SLAB_MERGE_DEFAULT', 'is not set'),
- CmdlineCheck('self_protection', 'kspp', 'slab_merge', 'is not set')))]
+ CmdlineCheck('self_protection', 'kspp', 'slab_merge', 'is not set'),
+ CmdlineCheck('self_protection', 'clipos', 'slub_merge', 'is not set')))]
l += [OR(CmdlineCheck('self_protection', 'kspp', 'iommu.strict', '1'),
AND(KconfigCheck('self_protection', 'kspp', 'IOMMU_DEFAULT_DMA_STRICT', 'y'),
CmdlineCheck('self_protection', 'kspp', 'iommu.strict', 'is not set')))]
# 'self_protection', 'clipos'
l += [CmdlineCheck('self_protection', 'clipos', 'page_alloc.shuffle', '1')]
if arch in ('X86_64', 'X86_32'):
- l += [AND(CmdlineCheck('self_protection', 'clipos', 'spectre_v2', 'on'),
- CmdlineCheck('self_protection', 'defconfig', 'nospectre_v2', 'is not set'))]
+ l += [CmdlineCheck('self_protection', 'clipos', 'iommu', 'force')]
+
+ # 'cut_attack_surface', 'defconfig'
+ if arch in ('X86_64', 'X86_32'):
+ l += [OR(CmdlineCheck('cut_attack_surface', 'defconfig', 'tsx', 'off'),
+ AND(KconfigCheck('cut_attack_surface', 'defconfig', 'X86_INTEL_TSX_MODE_OFF', 'y'),
+ CmdlineCheck('cut_attack_surface', 'defconfig', 'tsx', 'is not set')))]
# 'cut_attack_surface', 'kspp'
if arch == 'X86_64':
l += [OR(CmdlineCheck('cut_attack_surface', 'grsec', 'debugfs', 'off'),
KconfigCheck('cut_attack_surface', 'grsec', 'DEBUG_FS', 'is not set'))] # ... the end
+ # 'cut_attack_surface', 'my'
+ l += [CmdlineCheck('cut_attack_surface', 'my', 'sysrq_always_enabled', 'is not set')]
def print_unknown_options(checklist, parsed_options):
known_options = []
def normalize_cmdline_options(option, value):
# Don't normalize the cmdline option values if
# the Linux kernel doesn't use kstrtobool() for them
+ if option == 'debugfs':
+ # See debugfs_kernel() in fs/debugfs/inode.c
+ return value
+ if option == 'mitigations':
+ # See mitigations_parse_cmdline() in kernel/cpu.c
+ return value
if option == 'pti':
- # See pti_check_boottime_disable() in linux/arch/x86/mm/pti.c
+ # See pti_check_boottime_disable() in arch/x86/mm/pti.c
return value
if option == 'spectre_v2':
- # See spectre_v2_parse_cmdline() in linux/arch/x86/kernel/cpu/bugs.c
+ # See spectre_v2_parse_cmdline() in arch/x86/kernel/cpu/bugs.c
return value
- if option == 'debugfs':
- # See debugfs_kernel() in fs/debugfs/inode.c
+ if option == 'spectre_v2_user':
+ # See spectre_v2_parse_user_cmdline() in arch/x86/kernel/cpu/bugs.c
return value
- if option == 'mitigations':
- # See mitigations_parse_cmdline() in linux/kernel/cpu.c
+ if option == 'spec_store_bypass_disable':
+ # See ssb_parse_cmdline() in arch/x86/kernel/cpu/bugs.c
+ return value
+ if option == 'l1tf':
+ # See l1tf_cmdline() in arch/x86/kernel/cpu/bugs.c
+ return value
+ if option == 'mds':
+ # See mds_cmdline() in arch/x86/kernel/cpu/bugs.c
+ return value
+ if option == 'tsx_async_abort':
+ # See tsx_async_abort_parse_cmdline() in arch/x86/kernel/cpu/bugs.c
+ return value
+ if option == 'srbds':
+ # See srbds_parse_cmdline() in arch/x86/kernel/cpu/bugs.c
+ return value
+ if option == 'mmio_stale_data':
+ # See mmio_stale_data_parse_cmdline() in arch/x86/kernel/cpu/bugs.c
+ return value
+ if option == 'retbleed':
+ # See retbleed_parse_cmdline() in arch/x86/kernel/cpu/bugs.c
+ return value
+ if option == 'tsx':
+ # See tsx_init() in arch/x86/kernel/cpu/tsx.c
return value
# Implement a limited part of the kstrtobool() logic
parse_cmdline_file(parsed_cmdline_options, args.cmdline)
populate_with_data(config_checklist, parsed_cmdline_options, 'cmdline')
- # now everything is ready for performing the checks
+ # now everything is ready, perform the checks
perform_checks(config_checklist)
- # finally print the results
if mode == 'verbose':
- print_unknown_options(config_checklist, parsed_kconfig_options)
+ # print the parsed options without the checks (for debugging)
+ all_parsed_options = parsed_kconfig_options # assignment does not copy
+ if args.cmdline:
+ all_parsed_options.update(parsed_cmdline_options)
+ print_unknown_options(config_checklist, all_parsed_options)
+
+ # finally print the results
print_checklist(mode, config_checklist, True)
sys.exit(0)
projects / kconfig-hardened-check.git / blobdiff