peter/spectre-meltdown-checker
peter/spectre-meltdown-checker
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fix broken logic of 68961f9, increment version to 0.20

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Stéphane Lesimple 2018-01-09 14:54:17 +01:00
parent 19b01078c2
commit 322f4efc8f
1 changed files with 19 additions and 17 deletions
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36
spectre-meltdown-checker.sh
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@ -8,7 +8,7 @@
# #
# Stephane Lesimple # Stephane Lesimple
# #
VERSION=0.19 VERSION=0.20
# print status function # print status function
pstatus() pstatus()
@ -149,14 +149,16 @@ _echo_nol()
is_cpu_vulnerable() is_cpu_vulnerable()
{ {
# param: 1, 2 or 3 (variant) # param: 1, 2 or 3 (variant)
# returns 0 if vulnerable, 1 if vulnerable, 2 if not vulnerable, 255 on error # returns 1 if vulnerable, 0 if not vulnerable, 255 on error
variant1=1 # by default, everything is vulnerable, we work in a "whitelist" logic here.
variant2=1 # usage: is_cpu_vulnerable 2 && do something if vulnerable
variant3=1 variant1=0
variant2=0
variant3=0
if grep -q AMD /proc/cpuinfo; then if grep -q AMD /proc/cpuinfo; then
variant1=1 variant1=0
variant2=0 variant2=1
variant3=0 variant3=1
elif grep -qi 'CPU implementer : 0x41' /proc/cpuinfo; then elif grep -qi 'CPU implementer : 0x41' /proc/cpuinfo; then
# ARM # ARM
# reference: https://developer.arm.com/support/security-update # reference: https://developer.arm.com/support/security-update
@ -170,21 +172,21 @@ is_cpu_vulnerable()
# arch 7? 7? 7 7 7 8 8 8 8 # arch 7? 7? 7 7 7 8 8 8 8
if [ "$cpuarch" = 7 ] && echo "$cpupart" | grep -Eq '^0x(c09|c0f|c0e)$'; then if [ "$cpuarch" = 7 ] && echo "$cpupart" | grep -Eq '^0x(c09|c0f|c0e)$'; then
# armv7 vulnerable chips # armv7 vulnerable chips
variant1=1
variant2=1
elif [ "$cpuarch" = 8 ] && echo "$cpupart" | grep -Eq '^0x(d07|d08|d09|d0a)$'; then
# armv8 vulnerable chips
variant1=1
variant2=1
else
variant1=0 variant1=0
variant2=0 variant2=0
elif [ "$cpuarch" = 8 ] && echo "$cpupart" | grep -Eq '^0x(d07|d08|d09|d0a)$'; then
# armv8 vulnerable chips
variant1=0
variant2=0
else
variant1=1
variant2=1
fi fi
# for variant3, only A75 is vulnerable # for variant3, only A75 is vulnerable
if [ "$cpuarch" = 8 -a "$cpupart" = 0xd0a ]; then if [ "$cpuarch" = 8 -a "$cpupart" = 0xd0a ]; then
variant3=1
else
variant3=0 variant3=0
else
variant3=1
fi fi
fi fi
fi fi