fix: Linux 6.9+ changed some config options names (#490)

Issue #490 is about retpoline but other options have also changed,
as reported by a comment on the issue, this commit fixes these
other options:

Breno Leitao (10):
      x86/bugs: Rename CONFIG_GDS_FORCE_MITIGATION => CONFIG_MITIGATION_GDS_FORCE
      x86/bugs: Rename CONFIG_CPU_IBPB_ENTRY       => CONFIG_MITIGATION_IBPB_ENTRY
      x86/bugs: Rename CONFIG_CALL_DEPTH_TRACKING  => CONFIG_MITIGATION_CALL_DEPTH_TRACKING
      x86/bugs: Rename CONFIG_PAGE_TABLE_ISOLATION => CONFIG_MITIGATION_PAGE_TABLE_ISOLATION
      x86/bugs: Rename CONFIG_RETPOLINE            => CONFIG_MITIGATION_RETPOLINE
      x86/bugs: Rename CONFIG_SLS                  => CONFIG_MITIGATION_SLS
      x86/bugs: Rename CONFIG_CPU_UNRET_ENTRY      => CONFIG_MITIGATION_UNRET_ENTRY
      x86/bugs: Rename CONFIG_CPU_IBRS_ENTRY       => CONFIG_MITIGATION_IBRS_ENTRY
      x86/bugs: Rename CONFIG_CPU_SRSO             => CONFIG_MITIGATION_SRSO
      x86/bugs: Rename CONFIG_RETHUNK              => CONFIG_MITIGATION_RETHUNK

.github/workflows/check.yml

@@ -32,11 +32,11 @@ jobs:
         else
           echo "OK $nb CVEs reported"
         fi
-    - name: check docker-compose run execution
+    - name: check docker compose run execution
       run: |
         expected=19
-        docker-compose build
-        nb=$(docker-compose run --rm spectre-meltdown-checker --batch json | jq '.[]|.CVE' | wc -l)
+        docker compose build
+        nb=$(docker compose run --rm spectre-meltdown-checker --batch json | jq '.[]|.CVE' | wc -l)
         if [ "$nb" -ne "$expected" ]; then
           echo "Invalid number of CVEs reported: $nb instead of $expected"
           exit 1

README.md

@@ -76,10 +76,13 @@ sudo ./spectre-meltdown-checker.sh
 #### With docker-compose
 
 ```shell
-docker-compose build
-docker-compose run --rm spectre-meltdown-checker
+docker compose build
+docker compose run --rm spectre-meltdown-checker
 ```
 
+Note that on older versions of docker, `docker-compose` is a separate command, so you might
+need to replace the two `docker compose` occurences above by `docker-compose`.
+
 #### Without docker-compose
 
 ```shell

docker-compose.yml

@@ -1,5 +1,3 @@
-version: '2'
-
 services:
   spectre-meltdown-checker:
     build:

spectre-meltdown-checker.sh

@@ -4394,11 +4394,11 @@ check_CVE_2017_5715_linux()
 		# We check the RETPOLINE kernel options
 		retpoline=0
 		if [ -r "$opt_config" ]; then
-			if grep -q '^CONFIG_RETPOLINE=y' "$opt_config"; then
+			if grep -q '^CONFIG_\(MITIGATION_\)\?RETPOLINE=y' "$opt_config"; then
 				pstatus green YES
 				retpoline=1
 				# shellcheck disable=SC2046
-				_debug 'retpoline: found '$(grep '^CONFIG_RETPOLINE' "$opt_config")" in $opt_config"
+				_debug 'retpoline: found '$(grep '^CONFIG_\(MITIGATION_\)\?RETPOLINE' "$opt_config")" in $opt_config"
 			else
 				pstatus yellow NO
 			fi
@@ -4410,8 +4410,9 @@ check_CVE_2017_5715_linux()
 			# Now check if the compiler used to compile the kernel knows how to insert retpolines in generated asm
 			# For gcc, this is -mindirect-branch=thunk-extern (detected by the kernel makefiles)
 			# See gcc commit https://github.com/hjl-tools/gcc/commit/23b517d4a67c02d3ef80b6109218f2aadad7bd79
-			# In latest retpoline LKML patches, the noretpoline_setup symbol exists only if CONFIG_RETPOLINE is set
-			# *AND* if the compiler is retpoline-compliant, so look for that symbol
+			# In latest retpoline LKML patches, the noretpoline_setup symbol exists only if CONFIG_MITIGATION_RETPOLINE is set
+			# *AND* if the compiler is retpoline-compliant, so look for that symbol. The name of this kernel config 
+			# option before version 6.9-rc1 is CONFIG_RETPOLINE.
 			#
 			# if there is "retpoline" in the file and NOT "minimal", then it's full retpoline
 			# (works for vanilla and Red Hat variants)
@@ -4637,7 +4638,7 @@ check_CVE_2017_5715_linux()
 			# RETPOLINE (amd & intel &hygon )
 			if is_amd || is_intel || is_hygon; then
 				if [ "$retpoline" = 0 ]; then
-					explain "Your kernel is not compiled with retpoline support, so you need to either upgrade your kernel (if you're using a distro) or recompile your kernel with the CONFIG_RETPOLINE option enabled. You also need to compile your kernel with a retpoline-aware compiler (re-run this script with -v to know if your version of gcc is retpoline-aware)."
+					explain "Your kernel is not compiled with retpoline support, so you need to either upgrade your kernel (if you're using a distro) or recompile your kernel with the CONFIG_MITIGATION_RETPOLINE option enabled (was named CONFIG_RETPOLINE before kernel 6.9-rc1). You also need to compile your kernel with a retpoline-aware compiler (re-run this script with -v to know if your version of gcc is retpoline-aware)."
 				elif [ "$retpoline" = 1 ] && [ "$retpoline_compiler" = 0 ]; then
 					explain "Your kernel is compiled with retpoline, but without a retpoline-aware compiler (re-run this script with -v to know if your version of gcc is retpoline-aware)."
 				elif [ "$retpoline" = 1 ] && [ "$retpoline_compiler" = 1 ] && [ "$retp_enabled" = 0 ]; then
@@ -4793,7 +4794,7 @@ check_CVE_2017_5754_linux()
 		kpti_can_tell=0
 		if [ -n "$opt_config" ]; then
 			kpti_can_tell=1
-			kpti_support=$(grep -w -e CONFIG_PAGE_TABLE_ISOLATION=y -e CONFIG_KAISER=y -e CONFIG_UNMAP_KERNEL_AT_EL0=y "$opt_config")
+			kpti_support=$(grep -E -w -e 'CONFIG_(MITIGATION_)?PAGE_TABLE_ISOLATION=y' -e CONFIG_KAISER=y -e CONFIG_UNMAP_KERNEL_AT_EL0=y "$opt_config")
 			if [ -n "$kpti_support" ]; then
 				_debug "kpti_support: found option '$kpti_support' in $opt_config"
 			fi
@@ -4937,7 +4938,7 @@ check_CVE_2017_5754_linux()
 						explain "Your kernel supports PTI but it has been disabled, check \`dmesg\` right after boot to find clues why the system disabled it"
 					fi
 				else
-					explain "If you're using a distro kernel, upgrade your distro to get the latest kernel available. Otherwise, recompile the kernel with the CONFIG_PAGE_TABLE_ISOLATION option (named CONFIG_KAISER for some kernels), or the CONFIG_UNMAP_KERNEL_AT_EL0 option (for ARM64)"
+					explain "If you're using a distro kernel, upgrade your distro to get the latest kernel available. Otherwise, recompile the kernel with the CONFIG_(MITIGATION_)PAGE_TABLE_ISOLATION option (named CONFIG_KAISER for some kernels), or the CONFIG_UNMAP_KERNEL_AT_EL0 option (for ARM64)"
 				fi
 			fi
 		else
@@ -4945,7 +4946,7 @@ check_CVE_2017_5754_linux()
 				pvulnstatus $cve OK "offline mode: PTI will mitigate the vulnerability if enabled at runtime"
 			elif [ "$kpti_can_tell" = 1 ]; then
 				pvulnstatus $cve VULN "PTI is needed to mitigate the vulnerability"
-				explain "If you're using a distro kernel, upgrade your distro to get the latest kernel available. Otherwise, recompile the kernel with the CONFIG_PAGE_TABLE_ISOLATION option (named CONFIG_KAISER for some kernels), or the CONFIG_UNMAP_KERNEL_AT_EL0 option (for ARM64)"
+				explain "If you're using a distro kernel, upgrade your distro to get the latest kernel available. Otherwise, recompile the kernel with the CONFIG_(MITIGATION_)PAGE_TABLE_ISOLATION option (named CONFIG_KAISER for some kernels), or the CONFIG_UNMAP_KERNEL_AT_EL0 option (for ARM64)"
 			else
 				pvulnstatus $cve UNK "offline mode: not enough information"
 				explain "Re-run this script with root privileges, and give it the kernel image (--kernel), the kernel configuration (--config) and the System.map file (--map) corresponding to the kernel you would like to inspect."
@@ -4961,10 +4962,10 @@ check_CVE_2017_5754_linux()
 			_explain="Go to https://blog.xenproject.org/2018/01/22/xen-project-spectre-meltdown-faq-jan-22-update/ for more information"
 		elif [ "$msg" = "Vulnerable" ]; then
 			msg="PTI is needed to mitigate the vulnerability"
-			_explain="If you're using a distro kernel, upgrade your distro to get the latest kernel available. Otherwise, recompile the kernel with the CONFIG_PAGE_TABLE_ISOLATION option (named CONFIG_KAISER for some kernels), or the CONFIG_UNMAP_KERNEL_AT_EL0 option (for ARM64)"
+			_explain="If you're using a distro kernel, upgrade your distro to get the latest kernel available. Otherwise, recompile the kernel with the CONFIG_(MITIGATION_)PAGE_TABLE_ISOLATION option (named CONFIG_KAISER for some kernels), or the CONFIG_UNMAP_KERNEL_AT_EL0 option (for ARM64)"
 		fi
 		pvulnstatus $cve "$status" "$msg"
-		[ -z "${_explain:-}" ] && [ "$msg" = "Vulnerable" ] && _explain="If you're using a distro kernel, upgrade your distro to get the latest kernel available. Otherwise, recompile the kernel with the CONFIG_PAGE_TABLE_ISOLATION option (named CONFIG_KAISER for some kernels), or the CONFIG_UNMAP_KERNEL_AT_EL0 option (for ARM64)"
+		[ -z "${_explain:-}" ] && [ "$msg" = "Vulnerable" ] && _explain="If you're using a distro kernel, upgrade your distro to get the latest kernel available. Otherwise, recompile the kernel with the CONFIG_(MITIGATION_)PAGE_TABLE_ISOLATION option (named CONFIG_KAISER for some kernels), or the CONFIG_UNMAP_KERNEL_AT_EL0 option (for ARM64)"
 		[ -n "${_explain:-}" ] && explain "$_explain"
 		unset _explain
 	fi
@@ -6486,9 +6487,11 @@ check_CVE_2023_20569_linux() {
 
 		_info_nol "* Kernel compiled with SRSO support: "
 		if [ -r "$opt_config" ]; then
-			if grep -q '^CONFIG_CPU_SRSO=y' "$opt_config"; then
+			# CONFIG_CPU_SRSO: Linux < 6.9
+			# CONFIG_MITIGATION_SRSO: Linux >= 6.9
+			if grep -Eq '^CONFIG_(CPU|MITIGATION)_SRSO=y' "$opt_config"; then
 				pstatus green YES
-				kernel_srso="CONFIG_CPU_SRSO=y found in kernel config"
+				kernel_srso="CONFIG_(CPU|MITIGATION)_SRSO=y found in kernel config"
 			else
 				pstatus yellow NO "required for safe RET and ibpb_on_vmexit mitigations"
 			fi
@@ -6496,10 +6499,10 @@ check_CVE_2023_20569_linux() {
 			# https://github.com/torvalds/linux/commit/138bcddb86d8a4f842e4ed6f0585abc9b1a764ff#diff-17bd24a7a7850613cced545790ac30646097e8d6207348c2bd1845f397acb390R2313
 			if [ -n "$kernel_err" ]; then
 				pstatus yellow UNKNOWN "$kernel_err"
-			elif grep -q 'WARNING: kernel not compiled with CPU_SRSO' "$kernel"; then
+			elif grep -Eq 'WARNING: kernel not compiled with (CPU|MITIGATION)_SRSO' "$kernel"; then
 				# this msg is optimized out at compile time if the option is not enabled, see commit referenced above
 				# if it's present, then SRSO is NOT compiled in
-				pstatus yellow NO "kernel not compiled with CPU_SRSO"
+				pstatus yellow NO "kernel not compiled with (CPU|MITIGATION)_SRSO"
 			else
 				# if it's not present, then SRSO is compiled in IF kernel_sro==1, otherwise we're just
 				# in front of an old kernel that doesn't have the mitigation logic at all
@@ -6514,9 +6517,11 @@ check_CVE_2023_20569_linux() {
 
 		_info_nol "* Kernel compiled with IBPB_ENTRY support: "
 		if [ -r "$opt_config" ]; then
-			if grep -q '^CONFIG_CPU_IBPB_ENTRY=y' "$opt_config"; then
+			# CONFIG_CPU_IBPB_ENTRY: Linux < 6.9
+			# CONFIG_MITIGATION_IBPB_ENTRY: Linux >= 6.9
+			if grep -Eq '^CONFIG_(CPU|MITIGATION)_IBPB_ENTRY=y' "$opt_config"; then
 				pstatus green YES
-				kernel_ibpb_entry="CONFIG_CPU_IBPB_ENTRY=y found in kernel config"
+				kernel_ibpb_entry="CONFIG_(CPU|MITIGATION)_IBPB_ENTRY=y found in kernel config"
 			else
 				pstatus yellow NO
 			fi
@@ -6524,10 +6529,10 @@ check_CVE_2023_20569_linux() {
 			# https://github.com/torvalds/linux/commit/138bcddb86d8a4f842e4ed6f0585abc9b1a764ff#diff-17bd24a7a7850613cced545790ac30646097e8d6207348c2bd1845f397acb390R2325
 			if [ -n "$kernel_err" ]; then
 				pstatus yellow UNKNOWN "$kernel_err"
-			elif grep -q 'WARNING: kernel not compiled with CPU_IBPB_ENTRY' "$kernel"; then
+			elif grep -Eq 'WARNING: kernel not compiled with (CPU|MITIGATION)_IBPB_ENTRY' "$kernel"; then
 				# this msg is optimized out at compile time if the option is not enabled, see commit referenced above
 				# if it's present, then IBPB_ENTRY is NOT compiled in
-				pstatus yellow NO "kernel not compiled with CPU_IBPB_ENTRY"
+				pstatus yellow NO "kernel not compiled with (CPU|MITIGATION)_IBPB_ENTRY"
 			else
 				# if it's not present, then IBPB_ENTRY is compiled in IF kernel_sro==1, otherwise we're just
 				# in front of an old kernel that doesn't have the mitigation logic at all