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cpuid and msr module check

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This adds a check before loading the cpuid and msr modules under linux, ensuring they are not unloaded in exit_cleanup() if they were initially present.
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rrobgill 2018-05-04 07:21:48 +10:00 committed by Stéphane Lesimple
parent 4acd0f647a
commit 1c0f6d9580
1 changed files with 12 additions and 4 deletions
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16
spectre-meltdown-checker.sh
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@ -732,8 +732,12 @@ mount_debugfs()
load_msr() load_msr()
{ {
if [ "$os" = Linux ]; then if [ "$os" = Linux ]; then
modprobe msr 2>/dev/null && insmod_msr=1 if ! grep -e msr /proc/modules 2>/dev/null; then
_debug "attempted to load module msr, insmod_msr=$insmod_msr" modprobe msr 2>/dev/null && insmod_msr=1
_debug "attempted to load module msr, insmod_msr=$insmod_cpuid"
else
_debug "msr module already loaded"
fi
else else
if ! kldstat -q -m cpuctl; then if ! kldstat -q -m cpuctl; then
kldload cpuctl 2>/dev/null && kldload_cpuctl=1 kldload cpuctl 2>/dev/null && kldload_cpuctl=1
@ -747,8 +751,12 @@ load_msr()
load_cpuid() load_cpuid()
{ {
if [ "$os" = Linux ]; then if [ "$os" = Linux ]; then
modprobe cpuid 2>/dev/null && insmod_cpuid=1 if ! grep -e cpuid /proc/modules 2>/dev/null; then
_debug "attempted to load module cpuid, insmod_cpuid=$insmod_cpuid" modprobe cpuid 2>/dev/null && insmod_cpuid=1
_debug "attempted to load module cpuid, insmod_cpuid=$insmod_cpuid"
else
_debug "cpuid module already loaded"
fi
else else
if ! kldstat -q -m cpuctl; then if ! kldstat -q -m cpuctl; then
kldload cpuctl 2>/dev/null && kldload_cpuctl=1 kldload cpuctl 2>/dev/null && kldload_cpuctl=1