mirror of
https://github.com/speed47/spectre-meltdown-checker
synced 2024-08-30 07:43:40 +02:00
commit
7bbcfe0df7
@ -171,15 +171,20 @@ if [ ! -e /sys/kernel/debug/sched_features ]; then
|
||||
# try to mount the debugfs hierarchy ourselves and remember it to umount afterwards
|
||||
mount -t debugfs debugfs /sys/kernel/debug 2>/dev/null && mounted_debugfs=1
|
||||
fi
|
||||
if [ -e /sys/kernel/debug/ibrs_enabled -o -e /sys/kernel/debug/x86/ibrs_enabled ]; then
|
||||
if [ -e /sys/kernel/debug/ibrs_enabled ]; then
|
||||
# if the file is there, we have IBRS compiled-in
|
||||
pstatus green YES
|
||||
ibrs_supported=1
|
||||
ibrs_enabled=$(cat /sys/kernel/debug/ibrs_enabled 2>/dev/null)
|
||||
elif [ -e /sys/kernel/debug/x86/ibrs_enabled ]; then
|
||||
# RedHat uses a different path (see https://access.redhat.com/articles/3311301)
|
||||
pstatus green YES
|
||||
ibrs_supported=1
|
||||
ibrs_enabled=$(cat /sys/kernel/debug/x86/ibrs_enabled 2>/dev/null)
|
||||
else
|
||||
pstatus red NO
|
||||
fi
|
||||
|
||||
[ -f /sys/kernel/debug/ibrs_enabled ] && ibrs_enabled=$(cat /sys/kernel/debug/ibrs_enabled 2>/dev/null) || ibrs_enabled=$(cat /sys/kernel/debug/x86/ibrs_enabled 2>/dev/null)
|
||||
/bin/echo -n "* IBRS enabled for Kernel space: "
|
||||
# 0 means disabled
|
||||
# 1 is enabled only for kernel space
|
||||
@ -199,11 +204,6 @@ case "$ibrs_enabled" in
|
||||
*) pstatus yellow unknown;;
|
||||
esac
|
||||
|
||||
if [ "$mounted_debugfs" = 1 ]; then
|
||||
# umount debugfs if we did mount it ourselves
|
||||
umount /sys/kernel/debug
|
||||
fi
|
||||
|
||||
/bin/echo "* Mitigation 2"
|
||||
/bin/echo -n "* Kernel compiled with retpolines: "
|
||||
# We check the RETPOLINE kernel options
|
||||
@ -250,13 +250,13 @@ kpti_can_tell=0
|
||||
if [ -e /proc/config.gz ]; then
|
||||
# either the running kernel exports his own config
|
||||
kpti_can_tell=1
|
||||
if zgrep -q '^CONFIG_PAGE_TABLE_ISOLATION=y' /proc/config.gz; then
|
||||
if zgrep -q '^\(CONFIG_PAGE_TABLE_ISOLATION=y\|CONFIG_KAISER=y\)' /proc/config.gz; then
|
||||
kpti_support=1
|
||||
fi
|
||||
elif [ -e /boot/config-$(uname -r) ]; then
|
||||
# or we can find a config file in /root with the kernel release name
|
||||
kpti_can_tell=1
|
||||
if grep -q '^CONFIG_PAGE_TABLE_ISOLATION=y' /boot/config-$(uname -r); then
|
||||
if grep -q '^\(CONFIG_PAGE_TABLE_ISOLATION=y\|CONFIG_KAISER=y\)' /boot/config-$(uname -r); then
|
||||
kpti_support=1
|
||||
fi
|
||||
fi
|
||||
@ -290,17 +290,26 @@ if grep ^flags /proc/cpuinfo | grep -qw pti; then
|
||||
# vanilla PTI patch sets the 'pti' flag in cpuinfo
|
||||
pstatus green YES
|
||||
kpti_enabled=1
|
||||
elif [ -e /sys/kernel/debug/x86/pti_enabled ]; then
|
||||
# RedHat Backport creates a dedicated file, see https://access.redhat.com/articles/3311301
|
||||
kpti_enabled=$(cat /sys/kernel/debug/x86/pti_enabled 2>/dev/null)
|
||||
elif dmesg | grep -Eq 'Kernel/User page tables isolation: enabled|Kernel page table isolation enabled'; then
|
||||
# if we can't find the flag, grep in dmesg
|
||||
pstatus green YES
|
||||
kpti_enabled=1
|
||||
elif [ -e /sys/kernel/debug/x86/pti_enabled -a "$(cat /sys/kernel/debug/x86/pti_enabled 2>/dev/null)" = 1 ]; then
|
||||
pstatus green YES
|
||||
kpti_enabled=1
|
||||
else
|
||||
kpti_enabled=0
|
||||
fi
|
||||
if [ "$kpti_enabled" = 1 ]; then
|
||||
pstatus green YES
|
||||
else
|
||||
pstatus red NO
|
||||
fi
|
||||
|
||||
if [ "$mounted_debugfs" = 1 ]; then
|
||||
# umount debugfs if we did mount it ourselves
|
||||
umount /sys/kernel/debug
|
||||
fi
|
||||
|
||||
/bin/echo -ne "> \033[46m\033[30mSTATUS:\033[0m "
|
||||
if grep -q AMD /proc/cpuinfo; then
|
||||
pstatus green "NOT VULNERABLE" "your CPU is not vulnerable as per the vendor"
|
||||
|
Loading…
Reference in New Issue
Block a user