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fix(l1tf): properly detect status under Red Hat/CentOS kernels

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This commit is contained in:
Stéphane Lesimple 2018-09-29 13:00:42 +02:00
parent 299103a3ae
commit cbb18cb6b6
1 changed files with 7 additions and 3 deletions
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10
spectre-meltdown-checker.sh
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@ -3780,13 +3780,17 @@ check_CVE_2018_3646_linux()
_info_nol " * L1D flush enabled: "
if [ "$opt_live" = 1 ]; then
if [ -r "/sys/devices/system/cpu/vulnerabilities/l1tf" ]; then
if grep -Eq 'VMX: (L1D )?vulnerable' "/sys/devices/system/cpu/vulnerabilities/l1tf"; then
# vanilla: VMX: $l1dstatus, SMT $smtstatus
# Red Hat: VMX: SMT $smtstatus, L1D $l1dstatus
# $l1dstatus is one of (auto|vulnerable|conditional cache flushes|cache flushes|EPT disabled|flush not necessary)
# $smtstatus is one of (vulnerable|disabled)
if grep -Eq '(VMX:|L1D) (EPT disabled|vulnerable|flush not necessary)' "/sys/devices/system/cpu/vulnerabilities/l1tf"; then
l1d_mode=0
pstatus yellow NO
elif grep -Eq 'VMX: (L1D )?conditional cache flushes' "/sys/devices/system/cpu/vulnerabilities/l1tf"; then
elif grep -Eq '(VMX:|L1D) conditional cache flushes' "/sys/devices/system/cpu/vulnerabilities/l1tf"; then
l1d_mode=1
pstatus green YES "conditional flushes"
elif grep -Eq 'VMX: (L1D )?cache flushes' "/sys/devices/system/cpu/vulnerabilities/l1tf"; then
elif grep -Eq '(VMX:|L1D) cache flushes' "/sys/devices/system/cpu/vulnerabilities/l1tf"; then
l1d_mode=2
pstatus green YES "unconditional flushes"
else