Save the list of disabled mitigations of CPU vulnerabilities (for history)

[kconfig-hardened-check.git] / kconfig_hardened_check / __init__.py

diff --git a/kconfig_hardened_check/__init__.py b/kconfig_hardened_check/__init__.py
index 8e08fd2da4df97b95b3cd3a4ae668e77d88e2616..673cb5224c9f8e02845859ce542f57dd0a835ac2 100644 (file)
--- a/kconfig_hardened_check/__init__.py
+++ b/kconfig_hardened_check/__init__.py
@@ -13,13 +13,27 @@
 # N.B Hardening command line parameters:
 #    iommu=force (does it help against DMA attacks?)
 #
-#    Mitigations of CPU vulnerabilities:
-#       Аrch-independent:
-#       X86:
-#           l1d_flush=on (a part of the l1tf option)
-#           tsx=off
-#       ARM64:
-#           kpti=on
+# The list of disabled mitigations of CPU vulnerabilities:
+#   mitigations=off
+#   pti=off
+#   spectre_v2=off
+#   spectre_v2_user=off
+#   spec_store_bypass_disable=off
+#   l1tf=off
+#   mds=off
+#   tsx_async_abort=off
+#   srbds=off
+#   mmio_stale_data=off
+#   retbleed=off
+#     nopti
+#     nokaslr
+#     nospectre_v1
+#     nospectre_v2
+#     nospectre_bhb
+#     nospec_store_bypass_disable
+#       kpti=0
+#       ssbd=force-off
+#       nosmt (enabled)
 #
 #    Hardware tag-based KASAN with arm64 Memory Tagging Extension (MTE):
 #           kasan=on
@@ -111,6 +125,8 @@ class OptCheck:
         if self.expected == 'is not off':
             if self.state == 'off':
                 self.result = 'FAIL: is off'
+            if self.state == '0':
+                self.result = 'FAIL: is off, "0"'
             elif self.state is None:
                 self.result = 'FAIL: is off, not found'
             else:
@@ -279,7 +295,7 @@ class AND(ComplexOptCheck):
                     self.result = 'FAIL: {} is not "{}"'.format(opt.name, opt.expected)
                 elif opt.result == 'FAIL: is not present':
                     self.result = 'FAIL: {} is not present'.format(opt.name)
-                elif opt.result == 'FAIL: is off':
+                elif opt.result == 'FAIL: is off' or opt.result == 'FAIL: is off, "0"':
                     self.result = 'FAIL: {} is off'.format(opt.name)
                 elif opt.result == 'FAIL: is off, not found':
                     self.result = 'FAIL: {} is off, not found'.format(opt.name)
@@ -722,6 +738,7 @@ def add_cmdline_checks(l, arch):
     l += [CmdlineCheck('self_protection', 'defconfig', 'nopti', 'is not set')]
     l += [CmdlineCheck('self_protection', 'defconfig', 'nospectre_v1', 'is not set')]
     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', 'arm64.nobti', 'is not set')]
     l += [CmdlineCheck('self_protection', 'defconfig', 'arm64.nopauth', 'is not set')]
@@ -746,6 +763,8 @@ def add_cmdline_checks(l, arch):
              CmdlineCheck('self_protection', 'defconfig', 'mmio_stale_data', 'is not set'))]
     l += [OR(CmdlineCheck('self_protection', 'defconfig', 'retbleed', 'is not off'),
              CmdlineCheck('self_protection', 'defconfig', 'retbleed', 'is not set'))]
+    l += [OR(CmdlineCheck('self_protection', 'defconfig', 'kpti', 'is not off'),
+             CmdlineCheck('self_protection', 'defconfig', 'kpti', 'is not set'))]
     if arch == 'ARM64':
         l += [OR(CmdlineCheck('self_protection', 'defconfig', 'ssbd', 'kernel'),
                  CmdlineCheck('self_protection', 'my', 'ssbd', 'force-on'),
@@ -796,6 +815,12 @@ def add_cmdline_checks(l, arch):
     # 'self_protection', 'clipos'
     l += [CmdlineCheck('self_protection', 'clipos', 'page_alloc.shuffle', '1')]
 
+    # 'cut_attack_surface', 'defconfig'
+    if arch in ('X86_64', 'X86_32'):
+        l += [OR(CmdlineCheck('cut_attack_surface', 'defconfig', 'tsx', 'off'),
+                 AND(KconfigCheck('cut_attack_surface', 'defconfig', 'X86_INTEL_TSX_MODE_OFF', 'y'),
+                     CmdlineCheck('cut_attack_surface', 'defconfig', 'tsx', 'is not set')))]
+
     # 'cut_attack_surface', 'kspp'
     if arch == 'X86_64':
         l += [OR(CmdlineCheck('cut_attack_surface', 'kspp', 'vsyscall', 'none'),
@@ -989,6 +1014,9 @@ def normalize_cmdline_options(option, value):
     if option == 'retbleed':
         # See retbleed_parse_cmdline() in arch/x86/kernel/cpu/bugs.c
         return value
+    if option == 'tsx':
+        # See tsx_init() in arch/x86/kernel/cpu/tsx.c
+        return value
 
     # Implement a limited part of the kstrtobool() logic
     if value in ('1', 'on', 'On', 'ON', 'y', 'Y', 'yes', 'Yes', 'YES'):