CI: Add a functional test without collecting coverage (tired of codecov failures)

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

diff --git a/kernel_hardening_checker/checks.py b/kernel_hardening_checker/checks.py
index ca014afc8fd9382fefd6a2572a52959093a0c7ce..fa664e04861f31a4e655842d76bf71495cd9c6ae 100644 (file)
--- a/kernel_hardening_checker/checks.py
+++ b/kernel_hardening_checker/checks.py
@@ -26,6 +26,9 @@ def add_kconfig_checks(l, arch):
     efi_not_set = KconfigCheck('-', '-', 'EFI', 'is not set')
     cc_is_gcc = KconfigCheck('-', '-', 'CC_IS_GCC', 'y') # exists since v4.18
     cc_is_clang = KconfigCheck('-', '-', 'CC_IS_CLANG', 'y') # exists since v4.18
+    if arch in ('X86_64', 'X86_32'):
+        cpu_sup_amd_not_set = KconfigCheck('-', '-', 'CPU_SUP_AMD', 'is not set')
+        cpu_sup_intel_not_set = KconfigCheck('-', '-', 'CPU_SUP_INTEL', 'is not set')
 
     modules_not_set = KconfigCheck('cut_attack_surface', 'kspp', 'MODULES', 'is not set') # radical, but may be useful in some cases
     devmem_not_set = KconfigCheck('cut_attack_surface', 'kspp', 'DEVMEM', 'is not set') # refers to LOCKDOWN
@@ -61,16 +64,10 @@ def add_kconfig_checks(l, arch):
     if arch in ('X86_64', 'ARM64', 'ARM'):
         l += [vmap_stack_is_set]
     if arch in ('X86_64', 'X86_32'):
-        cpu_sup_amd_not_set=KconfigCheck('-', '-', 'CPU_SUP_AMD', 'is not set')
-        cpu_sup_intel_not_set=KconfigCheck('-', '-', 'CPU_SUP_INTEL', 'is not set')
         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 += [OR(KconfigCheck('self_protection', 'defconfig', 'X86_MCE_INTEL', 'y'),
-                 cpu_sup_intel_not_set)]
-        l += [OR(KconfigCheck('self_protection', 'defconfig', 'X86_MCE_AMD', 'y'),
-                 cpu_sup_amd_not_set)]
         l += [KconfigCheck('self_protection', 'defconfig', 'RETPOLINE', 'y')]
         l += [KconfigCheck('self_protection', 'defconfig', 'SYN_COOKIES', 'y')] # another reason?
         microcode_is_set = KconfigCheck('self_protection', 'defconfig', 'MICROCODE', 'y')
@@ -87,6 +84,10 @@ def add_kconfig_checks(l, arch):
                  VersionCheck((5, 19, 0)))] # X86_SMAP is enabled by default since v5.19
         l += [OR(KconfigCheck('self_protection', 'defconfig', 'X86_UMIP', 'y'),
                  KconfigCheck('self_protection', 'defconfig', 'X86_INTEL_UMIP', 'y'))]
+        l += [OR(KconfigCheck('self_protection', 'defconfig', 'X86_MCE_INTEL', 'y'),
+                 cpu_sup_intel_not_set)]
+        l += [OR(KconfigCheck('self_protection', 'defconfig', 'X86_MCE_AMD', 'y'),
+                 cpu_sup_amd_not_set)]
     if arch in ('ARM64', 'ARM'):
         l += [KconfigCheck('self_protection', 'defconfig', 'HW_RANDOM_TPM', 'y')]
         l += [KconfigCheck('self_protection', 'defconfig', 'IOMMU_DEFAULT_DMA_STRICT', 'y')]
@@ -281,8 +282,8 @@ def add_kconfig_checks(l, arch):
         l += [OR(KconfigCheck('cut_attack_surface', 'defconfig', 'STRICT_DEVMEM', 'y'),
                  devmem_not_set)] # refers to LOCKDOWN
     if arch in ('X86_64', 'X86_32'):
-        l += [OR(KconfigCheck('cut_attack_surface', 'defconfig', 'X86_INTEL_TSX_MODE_OFF', 'y'), # tsx=off
-                 cpu_sup_intel_not_set)]
+        l += [OR(KconfigCheck('cut_attack_surface', 'defconfig', 'X86_INTEL_TSX_MODE_OFF', 'y'),
+                 cpu_sup_intel_not_set)] # tsx=off
 
     # 'cut_attack_surface', 'kspp'
     l += [KconfigCheck('cut_attack_surface', 'kspp', 'SECURITY_DMESG_RESTRICT', 'y')]
@@ -560,7 +561,7 @@ def add_cmdline_checks(l, arch):
         l += [OR(CmdlineCheck('cut_attack_surface', 'defconfig', 'tsx', 'off'),
                  AND(KconfigCheck('cut_attack_surface', 'defconfig', 'X86_INTEL_TSX_MODE_OFF', 'y'),
                      tsx_not_set),
-                 AND(KconfigCheck('cut_attack_surface', 'defconfig', 'CPU_SUP_INTEL', 'is not set'),
+                 AND(KconfigCheck('-', '-', 'CPU_SUP_INTEL', 'is not set'),
                      tsx_not_set))]
 
     # 'cut_attack_surface', 'kspp'
@@ -662,21 +663,34 @@ def add_sysctl_checks(l, _arch):
 # Calling the SysctlCheck class constructor:
 #   SysctlCheck(reason, decision, name, expected)
 
-    l += [SysctlCheck('self_protection', 'kspp', 'net.core.bpf_jit_harden', '2')]
+    # Use an omnipresent kconfig symbol to see if we have a kconfig file for checking
+    have_kconfig = KconfigCheck('-', '-', 'LOCALVERSION', 'is present')
+
+    l += [OR(SysctlCheck('self_protection', 'kspp', 'net.core.bpf_jit_harden', '2'),
+             AND(KconfigCheck('-', '-', 'BPF_JIT', 'is not set'),
+                 have_kconfig))]
 
     l += [SysctlCheck('cut_attack_surface', 'kspp', 'kernel.dmesg_restrict', '1')]
     l += [SysctlCheck('cut_attack_surface', 'kspp', 'kernel.perf_event_paranoid', '3')] # with a custom patch, see https://lwn.net/Articles/696216/
-    l += [SysctlCheck('cut_attack_surface', 'kspp', 'kernel.kexec_load_disabled', '1')]
     l += [SysctlCheck('cut_attack_surface', 'kspp', 'user.max_user_namespaces', '0')] # may break the upower daemon in Ubuntu
     l += [SysctlCheck('cut_attack_surface', 'kspp', 'dev.tty.ldisc_autoload', '0')]
-    l += [SysctlCheck('cut_attack_surface', 'kspp', 'kernel.unprivileged_bpf_disabled', '1')]
     l += [SysctlCheck('cut_attack_surface', 'kspp', 'kernel.kptr_restrict', '2')]
     l += [SysctlCheck('cut_attack_surface', 'kspp', 'dev.tty.legacy_tiocsti', '0')]
-    l += [SysctlCheck('cut_attack_surface', 'kspp', 'vm.unprivileged_userfaultfd', '0')]
+    l += [OR(SysctlCheck('cut_attack_surface', 'kspp', 'kernel.kexec_load_disabled', '1'),
+             AND(KconfigCheck('-', '-', 'KEXEC_CORE', 'is not set'),
+                 have_kconfig))]
+    l += [OR(SysctlCheck('cut_attack_surface', 'kspp', 'kernel.unprivileged_bpf_disabled', '1'),
+             AND(KconfigCheck('cut_attack_surface', 'lockdown', 'BPF_SYSCALL', 'is not set'),
+                 have_kconfig))]
+    l += [OR(SysctlCheck('cut_attack_surface', 'kspp', 'vm.unprivileged_userfaultfd', '0'),
+             AND(KconfigCheck('cut_attack_surface', 'grsec', 'USERFAULTFD', 'is not set'),
+                 have_kconfig))]
           # At first, it disabled unprivileged userfaultfd,
           # and since v5.11 it enables unprivileged userfaultfd for user-mode only.
 
-    l += [SysctlCheck('cut_attack_surface', 'clipos', 'kernel.modules_disabled', '1')] # radical, but may be useful in some cases
+    l += [OR(SysctlCheck('cut_attack_surface', 'clipos', 'kernel.modules_disabled', '1'),
+             AND(KconfigCheck('cut_attack_surface', 'kspp', 'MODULES', 'is not set'),
+                 have_kconfig))] # radical, but may be useful in some cases
 
     l += [SysctlCheck('harden_userspace', 'kspp', 'fs.protected_symlinks', '1')]
     l += [SysctlCheck('harden_userspace', 'kspp', 'fs.protected_hardlinks', '1')]