Merge branch 'shstk'

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

diff --git a/kernel_hardening_checker/checks.py b/kernel_hardening_checker/checks.py
index 6b9db7a85f8a38962d3c791d06e1408632e48e73..5ec19cc5b7b7ad4a77a370d9c3671d579750eabd 100644 (file)
--- a/kernel_hardening_checker/checks.py
+++ b/kernel_hardening_checker/checks.py
@@ -138,7 +138,8 @@ def add_kconfig_checks(l, arch):
              VersionCheck((6, 6, 8)))] # DEBUG_CREDENTIALS was dropped in v6.6.8
     l += [OR(KconfigCheck('self_protection', 'kspp', 'DEBUG_NOTIFIERS', 'y'),
              AND(cfi_clang_is_set,
-                 cfi_clang_permissive_not_set))]
+                 cfi_clang_permissive_not_set,
+                 cc_is_clang))]
     l += [OR(KconfigCheck('self_protection', 'kspp', 'SCHED_STACK_END_CHECK', 'y'),
              vmap_stack_is_set)]
     kfence_is_set = KconfigCheck('self_protection', 'kspp', 'KFENCE', 'y')
@@ -206,9 +207,11 @@ def add_kconfig_checks(l, arch):
                   cc_is_gcc)]
         l += [KconfigCheck('self_protection', 'kspp', 'RANDOMIZE_KSTACK_OFFSET_DEFAULT', 'y')]
     if arch in ('X86_64', 'ARM64'):
-        l += [cfi_clang_is_set]
+        l += [AND(cfi_clang_is_set,
+                  cc_is_clang)]
         l += [AND(cfi_clang_permissive_not_set,
-                  cfi_clang_is_set)]
+                  cfi_clang_is_set,
+                  cc_is_clang)]
     if arch in ('X86_64', 'X86_32'):
         l += [KconfigCheck('self_protection', 'kspp', 'HW_RANDOM_TPM', 'y')]
         l += [KconfigCheck('self_protection', 'kspp', 'DEFAULT_MMAP_MIN_ADDR', '65536')]
@@ -404,6 +407,8 @@ def add_kconfig_checks(l, arch):
         l += [KconfigCheck('harden_userspace', 'defconfig', 'VMSPLIT_3G', 'y')]
     l += [KconfigCheck('harden_userspace', 'clipos', 'COREDUMP', 'is not set')]
     l += [KconfigCheck('harden_userspace', 'a13xp0p0v', 'ARCH_MMAP_RND_BITS', 'MAX')] # 'MAX' value is refined using ARCH_MMAP_RND_BITS_MAX
+    if arch == 'X86_64':
+        l += [KconfigCheck('harden_userspace', 'a13xp0p0v', 'X86_USER_SHADOW_STACK', 'y')]
 
 
 def add_cmdline_checks(l, arch):
@@ -646,7 +651,7 @@ def add_sysctl_checks(l, _arch):
     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')]
+    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')]