Commit c150fea5 by Alexander Popov

Update the self-protection checks adopted by KSPP (part III)

Thanks to @kees
parent e8a2c606
...@@ -490,6 +490,8 @@ def add_kconfig_checks(l, arch): ...@@ -490,6 +490,8 @@ def add_kconfig_checks(l, arch):
if arch in ('ARM64', 'ARM'): if arch in ('ARM64', 'ARM'):
l += [KconfigCheck('self_protection', 'kspp', 'DEFAULT_MMAP_MIN_ADDR', '32768')] l += [KconfigCheck('self_protection', 'kspp', 'DEFAULT_MMAP_MIN_ADDR', '32768')]
l += [KconfigCheck('self_protection', 'kspp', 'SYN_COOKIES', 'y')] # another reason? l += [KconfigCheck('self_protection', 'kspp', 'SYN_COOKIES', 'y')] # another reason?
if arch == 'X86_64':
l += [KconfigCheck('self_protection', 'kspp', 'SLS', 'y')] # vs CVE-2021-26341 in Straight-Line-Speculation
if arch == 'ARM64': if arch == 'ARM64':
l += [KconfigCheck('self_protection', 'kspp', 'ARM64_SW_TTBR0_PAN', 'y')] l += [KconfigCheck('self_protection', 'kspp', 'ARM64_SW_TTBR0_PAN', 'y')]
if arch == 'X86_32': if arch == 'X86_32':
...@@ -511,7 +513,6 @@ def add_kconfig_checks(l, arch): ...@@ -511,7 +513,6 @@ def add_kconfig_checks(l, arch):
# 'self_protection', 'my' # 'self_protection', 'my'
if arch == 'X86_64': 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'), l += [AND(KconfigCheck('self_protection', 'my', 'AMD_IOMMU_V2', 'y'),
iommu_support_is_set)] iommu_support_is_set)]
if arch == 'ARM64': if arch == 'ARM64':
...@@ -567,6 +568,8 @@ def add_kconfig_checks(l, arch): ...@@ -567,6 +568,8 @@ def add_kconfig_checks(l, arch):
l += [devmem_not_set] l += [devmem_not_set]
l += [OR(KconfigCheck('cut_attack_surface', 'kspp', 'IO_STRICT_DEVMEM', 'y'), l += [OR(KconfigCheck('cut_attack_surface', 'kspp', 'IO_STRICT_DEVMEM', 'y'),
devmem_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'))] # option presence check
if arch == 'ARM': if arch == 'ARM':
l += [OR(KconfigCheck('cut_attack_surface', 'kspp', 'STRICT_DEVMEM', 'y'), l += [OR(KconfigCheck('cut_attack_surface', 'kspp', 'STRICT_DEVMEM', 'y'),
devmem_not_set)] # refers to LOCKDOWN devmem_not_set)] # refers to LOCKDOWN
...@@ -638,8 +641,6 @@ def add_kconfig_checks(l, arch): ...@@ -638,8 +641,6 @@ def add_kconfig_checks(l, arch):
l += [KconfigCheck('cut_attack_surface', 'clipos', 'ACPI_TABLE_UPGRADE', 'is not set')] # refers to LOCKDOWN 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', 'EFI_CUSTOM_SSDT_OVERLAYS', 'is not set')]
l += [KconfigCheck('cut_attack_surface', 'clipos', 'COREDUMP', 'is not set')] # cut userspace attack surface l += [KconfigCheck('cut_attack_surface', 'clipos', 'COREDUMP', 'is not set')] # cut userspace attack surface
l += [AND(KconfigCheck('cut_attack_surface', 'clipos', 'LDISC_AUTOLOAD', 'is not set'),
KconfigCheck('cut_attack_surface', 'clipos', 'LDISC_AUTOLOAD'))] # option presence check
if arch in ('X86_64', 'X86_32'): 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', 'X86_INTEL_TSX_MODE_OFF', 'y')] # tsx=off
......
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