skip kernel.modules_disabled if MODULES not set

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

diff --git a/kernel_hardening_checker/checks.py b/kernel_hardening_checker/checks.py
index 0e0f2051ec777ce217fb6e5980a1ad7bf2ecb6be..4b5dee6c5dbcb50502ddb5be64b4405745a135c4 100644 (file)
--- a/kernel_hardening_checker/checks.py
+++ b/kernel_hardening_checker/checks.py
@@ -682,11 +682,15 @@ def add_sysctl_checks(l, _arch):
     l += [SysctlCheck('cut_attack_surface', 'kspp', 'kernel.kptr_restrict', '2')]
     l += [OR(SysctlCheck('cut_attack_surface', 'kspp', 'dev.tty.legacy_tiocsti', '0'),
              SysctlCheck('cut_attack_surface', 'kspp', 'dev.tty.legacy_tiocsti', 'is not set'))]
-    l += [SysctlCheck('cut_attack_surface', 'kspp', 'vm.unprivileged_userfaultfd', '0')]
+    l += [OR(SysctlCheck('cut_attack_surface', 'kspp', 'vm.unprivileged_userfaultfd', '0'),
+             AND(KconfigCheck('cut_attack_surface', 'grsec', 'USERFAULTFD', 'is not set'),
+                 have_config_file))]
           # 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'), # radical, but may be useful in some cases
+             AND(KconfigCheck('cut_attack_surface', 'kspp', 'MODULES', 'is not set'),
+                 have_config_file))]
 
     l += [SysctlCheck('harden_userspace', 'kspp', 'fs.protected_symlinks', '1')]
     l += [SysctlCheck('harden_userspace', 'kspp', 'fs.protected_hardlinks', '1')]