peter/spectre-meltdown-checker
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spectre-meltdown-checker
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adding known non-vulnerable ARM chips

This commit is contained in:
Stéphane Lesimple 2018-01-09 13:11:48 +01:00
parent f0f2ea9b11
commit 68961f98c2
1 changed files with 59 additions and 7 deletions
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66
spectre-meltdown-checker.sh
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@ -146,6 +146,54 @@ _echo_nol()
__echo -n "$@"
}
is_cpu_vulnerable()
{
# param: 1, 2 or 3 (variant)
# returns 0 if vulnerable, 1 if vulnerable, 2 if not vulnerable, 255 on error
variant1=1
variant2=1
variant3=1
if grep -q AMD /proc/cpuinfo; then
variant1=1
variant2=0
variant3=0
elif grep -qi 'CPU implementer : 0x41' /proc/cpuinfo; then
# ARM
# reference: https://developer.arm.com/support/security-update
cpupart=$(awk '/CPU part :/ {print $4;exit}' /proc/cpuinfo)
cpuarch=$(awk '/CPU architecture:/ {print $3;exit}' /proc/cpuinfo)
if [ -n "$cpupart" -a -n "$cpuarch" ]; then
# Cortex-R7 and Cortex-R8 are real-time and only used in medical devices or such
# I can't find their CPU part number, but it's probably not that useful anyway
# model R7 R8 A9 A15 A17 A57 A72 A73 A75
# part ? ? 0xc09 0xc0f 0xc0e 0xd07 0xd08 0xd09 0xd0a
# arch 7? 7? 7 7 7 8 8 8 8
if [ "$cpuarch" = 7 ] && echo "$cpupart" | grep -Eq '^0x(c09|c0f|c0e)$'; then
# armv7 vulnerable chips
variant1=1
variant2=1
elif [ "$cpuarch" = 8 ] && echo "$cpupart" | grep -Eq '^0x(d07|d08|d09|d0a)$'; then
# armv8 vulnerable chips
variant1=1
variant2=1
else
variant1=0
variant2=0
fi
# for variant3, only A75 is vulnerable
if [ "$cpuarch" = 8 -a "$cpupart" = 0xd0a ]; then
variant3=1
else
variant3=0
fi
fi
fi
[ "$1" = 1 ] && return $variant1
[ "$1" = 2 ] && return $variant2
[ "$1" = 3 ] && return $variant3
return 255
}
_echo "\033[1;34mSpectre and Meltdown mitigation detection tool v$VERSION\033[0m"
_echo
@ -322,9 +370,13 @@ else
fi
_echo_nol "> \033[46m\033[30mSTATUS:\033[0m "
[ "$status" = 0 ] && pstatus yellow UNKNOWN
[ "$status" = 1 ] && pstatus red 'VULNERABLE' 'heuristic to be improved when official patches become available'
[ "$status" = 2 ] && pstatus green 'NOT VULNERABLE' 'heuristic to be improved when official patches become available'
if ! is_cpu_vulnerable 1; then
pstatus green 'NOT VULNERABLE' "your CPU vendor reported your CPU model as not vulnerable"
else
[ "$status" = 0 ] && pstatus yellow UNKNOWN
[ "$status" = 1 ] && pstatus red 'VULNERABLE' 'heuristic to be improved when official patches become available'
[ "$status" = 2 ] && pstatus green 'NOT VULNERABLE' 'heuristic to be improved when official patches become available'
fi
###########
# VARIANT 2
@ -461,8 +513,8 @@ else
fi
_echo_nol "> \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"
if ! is_cpu_vulnerable 2; then
pstatus green 'NOT VULNERABLE' "your CPU vendor reported your CPU model as not vulnerable"
elif [ "$retpoline" = 1 -a "$retpoline_compiler" = 1 ]; then
pstatus green "NOT VULNERABLE" "retpoline mitigate the vulnerability"
elif [ "$opt_live" = 1 ]; then
@ -553,8 +605,8 @@ if [ "$mounted_debugfs" = 1 ]; then
fi
_echo_nol "> \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"
if ! is_cpu_vulnerable 3; then
pstatus green 'NOT VULNERABLE' "your CPU vendor reported your CPU model as not vulnerable"
elif [ "$opt_live" = 1 ]; then
if [ "$kpti_enabled" = 1 ]; then
pstatus green "NOT VULNERABLE" "PTI mitigates the vulnerability"