# N.B Hardening command line parameters:
# page_alloc.shuffle=1
# iommu=force (does it help against DMA attacks?)
-# iommu.passthrough=0
-# iommu.strict=1
# slub_debug=FZ (slow)
# loadpin.enforce=1
# debugfs=no-mount (or off if possible)
#
# Should NOT be set:
# nokaslr
-# rodata=off
# sysrq_always_enabled
# arm64.nobti
# arm64.nopauth
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')]
randstruct_is_set = KconfigCheck('self_protection', 'kspp', 'GCC_PLUGIN_RANDSTRUCT', 'y')
l += [randstruct_is_set]
l += [KconfigCheck('harden_userspace', 'defconfig', 'INTEGRITY', 'y')]
if arch == 'ARM':
l += [KconfigCheck('harden_userspace', 'my', 'INTEGRITY', 'y')]
+ if arch == 'ARM64':
+ l += [KconfigCheck('harden_userspace', 'defconfig', 'ARM64_PTR_AUTH', 'y')]
+ l += [KconfigCheck('harden_userspace', 'defconfig', 'ARM64_BTI', 'y')]
if arch in ('ARM', 'X86_32'):
l += [KconfigCheck('harden_userspace', 'defconfig', 'VMSPLIT_3G', 'y')]
if arch in ('X86_64', 'ARM64'):
if arch in ('X86_32', 'ARM'):
l += [KconfigCheck('harden_userspace', 'my', 'ARCH_MMAP_RND_BITS', '16')]
-# l += [KconfigCheck('feature_test', 'my', 'LKDTM', 'm')] # only for debugging!
-
def add_cmdline_checks(l, arch):
# Calling the CmdlineCheck class constructor:
# Don't add CmdlineChecks in add_kconfig_checks() to avoid wrong results
# when the tool doesn't check the cmdline.
+ if arch == 'ARM64':
+ 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')))]
+
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')))]
l += [OR(CmdlineCheck('self_protection', 'kspp', 'slab_nomerge'),
AND(KconfigCheck('self_protection', 'clipos', 'SLAB_MERGE_DEFAULT', 'is not set'),
CmdlineCheck('self_protection', 'kspp', 'slab_merge', 'is not set')))] # option presence check
+ 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')))]
+ l += [OR(CmdlineCheck('self_protection', 'kspp', 'iommu.passthrough', '0'),
+ AND(KconfigCheck('self_protection', 'kspp', 'IOMMU_DEFAULT_PASSTHROUGH', 'is not set'),
+ CmdlineCheck('self_protection', 'kspp', 'iommu.passthrough', 'is not set')))]
if arch in ('X86_64', 'ARM64', 'X86_32'):
l += [OR(CmdlineCheck('self_protection', 'kspp', 'randomize_kstack_offset', '1'),
AND(KconfigCheck('self_protection', 'kspp', 'RANDOMIZE_KSTACK_OFFSET_DEFAULT', 'y'),
CmdlineCheck('self_protection', 'kspp', 'randomize_kstack_offset', 'is not set')))]
if arch in ('X86_64', 'X86_32'):
l += [CmdlineCheck('self_protection', 'kspp', 'pti', 'on')]
+
+ if arch == 'X86_64':
+ l += [OR(CmdlineCheck('cut_attack_surface', 'kspp', 'vsyscall', 'none'),
+ AND(KconfigCheck('cut_attack_surface', 'kspp', 'LEGACY_VSYSCALL_NONE', 'y'),
+ CmdlineCheck('cut_attack_surface', 'kspp', 'vsyscall', 'is not set')))]
+
# TODO: add other