From: Alexander Popov <alex.popov@linux.com>
Date: Sat, 19 Jun 2021 11:27:21 +0000 (+0300)
Subject: Update KSPP recommendations
X-Git-Tag: v0.5.10~11
X-Git-Url: https://jxself.org/git/?a=commitdiff_plain;h=29de5cc2de013ade52bb7589669672c7b0e2358d;p=kconfig-hardened-check.git

Update KSPP recommendations
---

diff --git a/kconfig_hardened_check/config_files/kspp-recommendations/kspp-recommendations-arm.config b/kconfig_hardened_check/config_files/kspp-recommendations/kspp-recommendations-arm.config
index 3c6c037..4271f7d 100644
--- a/kconfig_hardened_check/config_files/kspp-recommendations/kspp-recommendations-arm.config
+++ b/kconfig_hardened_check/config_files/kspp-recommendations/kspp-recommendations-arm.config
@@ -80,6 +80,9 @@ CONFIG_REFCOUNT_FULL=y
 # Check for memory copies that might overflow a structure in str*() and mem*() functions both at build-time and run-time.
 CONFIG_FORTIFY_SOURCE=y
 
+# Avoid kernel memory address exposures via dmesg (sets sysctl kernel.dmesg_restrict initial value to 1)
+CONFIG_SECURITY_DMESG_RESTRICT=y
+
 # Dangerous; enabling this allows direct physical memory writing.
 # CONFIG_ACPI_CUSTOM_METHOD is not set
 
diff --git a/kconfig_hardened_check/config_files/kspp-recommendations/kspp-recommendations-arm64.config b/kconfig_hardened_check/config_files/kspp-recommendations/kspp-recommendations-arm64.config
index 013263c..5043494 100644
--- a/kconfig_hardened_check/config_files/kspp-recommendations/kspp-recommendations-arm64.config
+++ b/kconfig_hardened_check/config_files/kspp-recommendations/kspp-recommendations-arm64.config
@@ -80,6 +80,9 @@ CONFIG_REFCOUNT_FULL=y
 # Check for memory copies that might overflow a structure in str*() and mem*() functions both at build-time and run-time.
 CONFIG_FORTIFY_SOURCE=y
 
+# Avoid kernel memory address exposures via dmesg (sets sysctl kernel.dmesg_restrict initial value to 1)
+CONFIG_SECURITY_DMESG_RESTRICT=y
+
 # Dangerous; enabling this allows direct physical memory writing.
 # CONFIG_ACPI_CUSTOM_METHOD is not set
 
diff --git a/kconfig_hardened_check/config_files/kspp-recommendations/kspp-recommendations-x86-32.config b/kconfig_hardened_check/config_files/kspp-recommendations/kspp-recommendations-x86-32.config
index 477d75c..edca82b 100644
--- a/kconfig_hardened_check/config_files/kspp-recommendations/kspp-recommendations-x86-32.config
+++ b/kconfig_hardened_check/config_files/kspp-recommendations/kspp-recommendations-x86-32.config
@@ -80,6 +80,9 @@ CONFIG_REFCOUNT_FULL=y
 # Check for memory copies that might overflow a structure in str*() and mem*() functions both at build-time and run-time.
 CONFIG_FORTIFY_SOURCE=y
 
+# Avoid kernel memory address exposures via dmesg (sets sysctl kernel.dmesg_restrict initial value to 1)
+CONFIG_SECURITY_DMESG_RESTRICT=y
+
 # Dangerous; enabling this allows direct physical memory writing.
 # CONFIG_ACPI_CUSTOM_METHOD is not set
 
@@ -162,6 +165,9 @@ CONFIG_X86_PAE=y
 # Disallow allocating the first 64k of memory.
 CONFIG_DEFAULT_MMAP_MIN_ADDR=65536
 
+# Disable Model-Specific Register writes.
+# CONFIG_X86_MSR is not set
+
 # Randomize position of kernel.
 CONFIG_RANDOMIZE_BASE=y
 
diff --git a/kconfig_hardened_check/config_files/kspp-recommendations/kspp-recommendations-x86-64.config b/kconfig_hardened_check/config_files/kspp-recommendations/kspp-recommendations-x86-64.config
index de19f33..799a37d 100644
--- a/kconfig_hardened_check/config_files/kspp-recommendations/kspp-recommendations-x86-64.config
+++ b/kconfig_hardened_check/config_files/kspp-recommendations/kspp-recommendations-x86-64.config
@@ -80,6 +80,9 @@ CONFIG_REFCOUNT_FULL=y
 # Check for memory copies that might overflow a structure in str*() and mem*() functions both at build-time and run-time.
 CONFIG_FORTIFY_SOURCE=y
 
+# Avoid kernel memory address exposures via dmesg (sets sysctl kernel.dmesg_restrict initial value to 1)
+CONFIG_SECURITY_DMESG_RESTRICT=y
+
 # Dangerous; enabling this allows direct physical memory writing.
 # CONFIG_ACPI_CUSTOM_METHOD is not set
 
@@ -157,6 +160,9 @@ CONFIG_X86_64=y
 # Disallow allocating the first 64k of memory.
 CONFIG_DEFAULT_MMAP_MIN_ADDR=65536
 
+# Disable Model-Specific Register writes.
+# CONFIG_X86_MSR is not set
+
 # Randomize position of kernel and memory.
 CONFIG_RANDOMIZE_BASE=y
 CONFIG_RANDOMIZE_MEMORY=y