Add the CPU_SRSO check

[kconfig-hardened-check.git] / kernel_hardening_checker / checks.py

diff --git a/kernel_hardening_checker/checks.py b/kernel_hardening_checker/checks.py
index d95d301fb1f0ea3e25564a601dd44519a6a3f994..ff42ca735d684fd7e6598371ac4b19eb6beec526 100644 (file)
--- a/kernel_hardening_checker/checks.py
+++ b/kernel_hardening_checker/checks.py
@@ -58,14 +58,23 @@ def add_kconfig_checks(l, arch):
     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', 'SPECULATION_MITIGATIONS', 'y')]
         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', 'CPU_SRSO', 'y')]
         l += [KconfigCheck('self_protection', 'defconfig', 'SYN_COOKIES', 'y')] # another reason?
+        microcode_is_set = KconfigCheck('self_protection', 'defconfig', 'MICROCODE', 'y')
+        l += [microcode_is_set] # is needed for mitigating CPU bugs
+        l += [OR(KconfigCheck('self_protection', 'defconfig', 'MICROCODE_INTEL', 'y'),
+                 AND(microcode_is_set,
+                     VersionCheck((6, 6))))] # MICROCODE_INTEL was included in MICROCODE since v6.6
+        l += [OR(KconfigCheck('self_protection', 'defconfig', 'MICROCODE_AMD', 'y'),
+                 AND(microcode_is_set,
+                     VersionCheck((6, 6))))] # MICROCODE_AMD was included in MICROCODE since v6.6
         l += [OR(KconfigCheck('self_protection', 'defconfig', 'X86_SMAP', 'y'),
                  VersionCheck((5, 19)))] # X86_SMAP is enabled by default since v5.19
         l += [OR(KconfigCheck('self_protection', 'defconfig', 'X86_UMIP', 'y'),
@@ -117,9 +126,12 @@ def add_kconfig_checks(l, arch):
     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 += [KconfigCheck('self_protection', 'kspp', 'KFENCE', 'y')]
     l += [KconfigCheck('self_protection', 'kspp', 'HW_RANDOM_TPM', 'y')]
     l += [KconfigCheck('self_protection', 'kspp', 'STATIC_USERMODEHELPER', 'y')] # needs userspace support
+    kfence_is_set = KconfigCheck('self_protection', 'kspp', 'KFENCE', 'y')
+    l += [kfence_is_set]
+    l += [AND(KconfigCheck('self_protection', 'my', 'KFENCE_SAMPLE_INTERVAL', 'is not off'),
+              kfence_is_set)]
     randstruct_is_set = OR(KconfigCheck('self_protection', 'kspp', 'RANDSTRUCT_FULL', 'y'),
                            KconfigCheck('self_protection', 'kspp', 'GCC_PLUGIN_RANDSTRUCT', 'y'))
     l += [randstruct_is_set]
@@ -368,6 +380,7 @@ def add_kconfig_checks(l, arch):
     l += [KconfigCheck('cut_attack_surface', 'my', 'XFS_SUPPORT_V4', 'is not set')]
     l += [OR(KconfigCheck('cut_attack_surface', 'my', 'TRIM_UNUSED_KSYMS', 'y'),
              modules_not_set)]
+    l += [KconfigCheck('cut_attack_surface', 'my', 'MODULE_FORCE_LOAD', 'is not set')]
 
     # 'harden_userspace'
     if arch == 'ARM64':
@@ -410,6 +423,7 @@ def add_cmdline_checks(l, arch):
     l += [CmdlineCheck('self_protection', 'defconfig', 'nospectre_v2', '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', 'dis_ucode_ldr', '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')]
@@ -441,6 +455,9 @@ def add_cmdline_checks(l, arch):
         l += [OR(CmdlineCheck('self_protection', 'defconfig', 'retbleed', 'is not off'),
                  AND(CmdlineCheck('self_protection', 'kspp', 'mitigations', 'auto,nosmt'),
                      CmdlineCheck('self_protection', 'defconfig', 'retbleed', 'is not set')))]
+        l += [OR(CmdlineCheck('self_protection', 'defconfig', 'spec_rstack_overflow', 'is not off'),
+                 AND(CmdlineCheck('self_protection', 'kspp', 'mitigations', 'auto,nosmt'),
+                     CmdlineCheck('self_protection', 'defconfig', 'spec_rstack_overflow', 'is not set')))]
     if arch == 'ARM64':
         l += [OR(CmdlineCheck('self_protection', 'defconfig', 'kpti', 'is not off'),
                  AND(CmdlineCheck('self_protection', 'kspp', 'mitigations', 'auto,nosmt'),
@@ -499,6 +516,11 @@ def add_cmdline_checks(l, arch):
     if arch in ('X86_64', 'X86_32'):
         l += [CmdlineCheck('self_protection', 'clipos', 'iommu', 'force')]
 
+    # 'self_protection', 'my'
+    l += [OR(CmdlineCheck('self_protection', 'my', 'kfence.sample_interval', 'is not off'),
+             AND(KconfigCheck('self_protection', 'my', 'KFENCE_SAMPLE_INTERVAL', 'is not off'),
+                 CmdlineCheck('self_protection', 'my', 'kfence.sample_interval', 'is not set')))]
+
     # 'cut_attack_surface', 'defconfig'
     if arch in ('X86_64', 'X86_32'):
         l += [OR(CmdlineCheck('cut_attack_surface', 'defconfig', 'tsx', 'off'),
@@ -552,6 +574,7 @@ no_kstrtobool_options = [
     'retbleed', # See retbleed_parse_cmdline() in arch/x86/kernel/cpu/bugs.c
     'rodata', # See set_debug_rodata() in init/main.c
     'ssbd', # See parse_spectre_v4_param() in arch/arm64/kernel/proton-pack.c
+    'spec_rstack_overflow', # See srso_parse_cmdline() in arch/x86/kernel/cpu/bugs.c
     'slub_debug', # See setup_slub_debug() in mm/slub.c
     'iommu', # See iommu_setup() in arch/x86/kernel/pci-dma.c
     'vsyscall', # See vsyscall_setup() in arch/x86/entry/vsyscall/vsyscall_64.c