#
# N.B Hardening command line parameters:
# iommu=force (does it help against DMA attacks?)
-# slub_debug=FZ (slow)
# loadpin.enforce=1
-# debugfs=no-mount (or off if possible)
#
# Mitigations of CPU vulnerabilities:
# Аrch-independent:
CmdlineCheck('self_protection', 'kspp', 'hardened_usercopy', 'is not set')))]
l += [OR(CmdlineCheck('self_protection', 'kspp', 'slab_common.usercopy_fallback', '0'),
AND(KconfigCheck('self_protection', 'kspp', 'HARDENED_USERCOPY_FALLBACK', 'is not set'),
- CmdlineCheck('self_protection', 'kspp', 'slab_common.usercopy_fallback', 'is not set')))]
- l += [OR(CmdlineCheck('self_protection', 'kspp', 'page_alloc.shuffle', '1'),
- AND(KconfigCheck('self_protection', 'kspp', 'SHUFFLE_PAGE_ALLOCATOR', 'y'),
- CmdlineCheck('self_protection', 'kspp', 'page_alloc.shuffle', 'is not set')))] # ... the end
+ CmdlineCheck('self_protection', 'kspp', 'slab_common.usercopy_fallback', 'is not set')))] # ... the end
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'),
if arch in ('X86_64', 'X86_32'):
l += [CmdlineCheck('self_protection', 'kspp', 'pti', 'on')]
+ # 'self_protection', 'clipos'
+ l += [CmdlineCheck('self_protection', 'clipos', 'page_alloc.shuffle', '1')]
+
# 'cut_attack_surface', 'kspp'
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')))]
+ # 'cut_attack_surface', 'grsec'
+ # The cmdline checks compatible with the kconfig options disabled by grsecurity...
+ l += [OR(CmdlineCheck('cut_attack_surface', 'grsec', 'debugfs', 'off'),
+ KconfigCheck('cut_attack_surface', 'grsec', 'DEBUG_FS', 'is not set'))] # ... the end
def print_unknown_options(checklist, parsed_options):
def normalize_cmdline_options(option, value):
- # Handle special cases
+ # Don't normalize the cmdline option values if
+ # the Linux kernel doesn't use kstrtobool() for them
if option == 'pti':
- # Don't normalize the pti value since
- # the Linux kernel doesn't use kstrtobool() for pti.
# See pti_check_boottime_disable() in linux/arch/x86/mm/pti.c
return value
+ if option == 'debugfs':
+ # See debugfs_kernel() in fs/debugfs/inode.c
+ return value
# Implement a limited part of the kstrtobool() logic
if value in ('1', 'on', 'On', 'ON', 'y', 'Y', 'yes', 'Yes', 'YES'):