Add ARM64 support

diff --git a/kconfig-hardened-check.py b/kconfig-hardened-check.py
index 530b56e02ab1e51b8493029ab8755ed86a0bca48..32f6313ecc26e8791eab2e9dbe47a62285ec2494 100755 (executable)
--- a/kconfig-hardened-check.py
+++ b/kconfig-hardened-check.py
@@ -36,7 +36,7 @@ import re
 
 debug_mode = False  # set it to True to print the unknown options from the config
 
-supported_archs = [ 'X86_64', 'X86_32' ]
+supported_archs = [ 'X86_64', 'X86_32', 'ARM64' ]
 
 checklist = []
 
@@ -136,12 +136,8 @@ def construct_checklist(arch):
     devmem_not_set = OptCheck('DEVMEM',                  'is not set', 'kspp', 'cut_attack_surface') # refers to LOCK_DOWN_KERNEL
 
     checklist.append(OptCheck('BUG',                         'y', 'defconfig', 'self_protection'))
-    checklist.append(OptCheck('RETPOLINE',                   'y', 'defconfig', 'self_protection'))
-    checklist.append(OptCheck('X86_SMAP',                    'y', 'defconfig', 'self_protection'))
-    checklist.append(OptCheck('X86_INTEL_UMIP',              'y', 'defconfig', 'self_protection'))
     checklist.append(OR(OptCheck('STRICT_KERNEL_RWX',        'y', 'defconfig', 'self_protection'), \
                         OptCheck('DEBUG_RODATA',             'y', 'defconfig', 'self_protection'))) # before v4.11
-    checklist.append(OptCheck('RANDOMIZE_BASE',              'y', 'defconfig', 'self_protection'))
     checklist.append(OR(OptCheck('STACKPROTECTOR_STRONG',    'y', 'defconfig', 'self_protection'), \
                         OptCheck('CC_STACKPROTECTOR_STRONG', 'y', 'defconfig', 'self_protection')))
     checklist.append(OptCheck('THREAD_INFO_IN_TASK',         'y', 'defconfig', 'self_protection'))
@@ -149,11 +145,20 @@ def construct_checklist(arch):
     checklist.append(OR(OptCheck('STRICT_MODULE_RWX',        'y', 'defconfig', 'self_protection'), \
                         OptCheck('DEBUG_SET_MODULE_RONX',    'y', 'defconfig', 'self_protection'), \
                         modules_not_set)) # DEBUG_SET_MODULE_RONX was before v4.11
-    checklist.append(OptCheck('SYN_COOKIES',                 'y', 'defconfig', 'self_protection')) # another reason?
     if arch == 'X86_64':
         checklist.append(OptCheck('PAGE_TABLE_ISOLATION',    'y', 'defconfig', 'self_protection'))
         checklist.append(OptCheck('RANDOMIZE_MEMORY',        'y', 'defconfig', 'self_protection'))
-        checklist.append(OptCheck('VMAP_STACK',              'y', 'defconfig', 'self_protection'))
+    if arch == 'X86_64' or arch == 'X86_32':
+        checklist.append(OptCheck('RANDOMIZE_BASE',              'y', 'defconfig', 'self_protection'))
+        checklist.append(OptCheck('RETPOLINE',                   'y', 'defconfig', 'self_protection'))
+        checklist.append(OptCheck('X86_SMAP',                    'y', 'defconfig', 'self_protection'))
+        checklist.append(OptCheck('X86_INTEL_UMIP',              'y', 'defconfig', 'self_protection'))
+        checklist.append(OptCheck('SYN_COOKIES',                 'y', 'defconfig', 'self_protection')) # another reason?
+    if arch == 'ARM64':
+        checklist.append(OptCheck('UNMAP_KERNEL_AT_EL0',         'y', 'defconfig', 'self_protection'))
+        checklist.append(OptCheck('REFCOUNT_FULL',               'y', 'defconfig', 'self_protection'))
+    if debug_mode or arch == 'X86_64' or arch == 'ARM64':
+        checklist.append(OptCheck('VMAP_STACK',                  'y', 'defconfig', 'self_protection'))
 
     checklist.append(OptCheck('BUG_ON_DATA_CORRUPTION',           'y', 'kspp', 'self_protection'))
     checklist.append(OptCheck('DEBUG_WX',                         'y', 'kspp', 'self_protection'))
@@ -169,7 +174,6 @@ def construct_checklist(arch):
     checklist.append(OptCheck('GCC_PLUGIN_STRUCTLEAK',            'y', 'kspp', 'self_protection'))
     checklist.append(OptCheck('GCC_PLUGIN_STRUCTLEAK_BYREF_ALL',  'y', 'kspp', 'self_protection'))
     checklist.append(OptCheck('GCC_PLUGIN_LATENT_ENTROPY',        'y', 'kspp', 'self_protection'))
-    checklist.append(OptCheck('REFCOUNT_FULL',                    'y', 'kspp', 'self_protection'))
     checklist.append(OptCheck('DEBUG_LIST',                       'y', 'kspp', 'self_protection'))
     checklist.append(OptCheck('DEBUG_SG',                         'y', 'kspp', 'self_protection'))
     checklist.append(OptCheck('DEBUG_CREDENTIALS',                'y', 'kspp', 'self_protection'))
@@ -181,10 +185,17 @@ def construct_checklist(arch):
     checklist.append(OR(OptCheck('MODULE_SIG_SHA512',             'y', 'kspp', 'self_protection'), \
                         modules_not_set))
     checklist.append(OptCheck('MODULE_SIG_FORCE',                 'y', 'kspp', 'self_protection')) # refers to LOCK_DOWN_KERNEL
-    checklist.append(OptCheck('DEFAULT_MMAP_MIN_ADDR',            '65536', 'kspp', 'self_protection'))
+    if arch == 'X86_64' or arch == 'X86_32':
+        checklist.append(OptCheck('DEFAULT_MMAP_MIN_ADDR',        '65536', 'kspp', 'self_protection'))
+        checklist.append(OptCheck('REFCOUNT_FULL',                'y', 'kspp', 'self_protection'))
     if arch == 'X86_32':
         checklist.append(OptCheck('HIGHMEM64G',                   'y', 'kspp', 'self_protection'))
         checklist.append(OptCheck('X86_PAE',                      'y', 'kspp', 'self_protection'))
+    if arch == 'ARM64':
+        checklist.append(OptCheck('DEFAULT_MMAP_MIN_ADDR',        '32768', 'kspp', 'self_protection'))
+        checklist.append(OptCheck('ARM64_SW_TTBR0_PAN',           'y', 'kspp', 'self_protection'))
+        checklist.append(OptCheck('RANDOMIZE_BASE',               'y', 'kspp', 'self_protection'))
+        checklist.append(OptCheck('SYN_COOKIES',                  'y', 'kspp', 'self_protection')) # another reason?
 
     checklist.append(OptCheck('GCC_PLUGIN_STACKLEAK',             'y', 'my', 'self_protection'))
     checklist.append(OptCheck('LOCK_DOWN_KERNEL',                 'y', 'my', 'self_protection')) # remember about LOCK_DOWN_MANDATORY
@@ -261,7 +272,7 @@ def construct_checklist(arch):
     if arch == 'X86_32':
         checklist.append(OptCheck('MODIFY_LDT_SYSCALL', 'is not set', 'my', 'cut_attack_surface'))
 
-    if arch == 'X86_64':
+    if arch == 'X86_64' or arch == 'ARM64':
         checklist.append(OptCheck('ARCH_MMAP_RND_BITS',   '32', 'my', 'userspace_protection'))
     if arch == 'X86_32':
         checklist.append(OptCheck('ARCH_MMAP_RND_BITS',   '16', 'my', 'userspace_protection'))