peter/spectre-meltdown-checker
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spectre-meltdown-checker
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remove dependency on rdmsr

This commit is contained in:
Stéphane Lesimple 2018-01-07 18:36:56 +01:00
parent 13f2133a97
commit bffda8b3e7
1 changed files with 6 additions and 16 deletions
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16
spectre-meltdown-checker.sh
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@ -1,7 +1,7 @@
#! /bin/sh #! /bin/sh
# Spectre & Meltdown checker # Spectre & Meltdown checker
# Stephane Lesimple # Stephane Lesimple
VERSION=0.05 VERSION=0.06
pstatus() pstatus()
{ {
@ -116,23 +116,13 @@ fi
if [ ! -e /dev/cpu/0/msr ]; then if [ ! -e /dev/cpu/0/msr ]; then
pstatus yellow UNKNOWN "couldn't read /dev/cpu/0/msr, is msr support enabled in your kernel?" pstatus yellow UNKNOWN "couldn't read /dev/cpu/0/msr, is msr support enabled in your kernel?"
else else
if which rdmsr >/dev/null 2>&1; then # same that rdmsr 0x48 but without needing the rdmsr tool
rdmsr 0x48 >/dev/null 2>&1 dd if=/dev/cpu/0/msr of=/dev/null bs=8 count=1 skip=9 2>/dev/null
if [ $? -eq 0 ]; then if [ $? -eq 0 ]; then
pstatus green YES pstatus green YES
else else
pstatus red NO pstatus red NO
fi fi
else
pstatus yellow UNKNOWN "missing 'rdmsr' tool, please install it, usually it's in the msr-tools package"
# doesn't work:
#dd if=/dev/cpu/0/msr of=/dev/null bs=1 count=8 skip=72 2>/dev/null
#if [ $? -eq 0 ]; then
# pstatus green YES
#else
# pstatus red NO
#fi
fi
fi fi
if [ "$insmod_msr" = 1 ]; then if [ "$insmod_msr" = 1 ]; then