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fix(cpuid): fix off-by-one SPEC_CTRL bit check

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Stéphane Lesimple 2018-01-24 12:18:56 +01:00
parent 53b9eda040
commit 3c1d452c99
1 changed files with 2 additions and 2 deletions
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spectre-meltdown-checker.sh
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@ -917,9 +917,9 @@ check_variant2()
# getting high byte of edx on leaf7 of cpuinfo in decimal
edx_hb=$(dd if=/dev/cpu/0/cpuid bs=16 skip=7 iflag=skip_bytes count=1 2>/dev/null | dd bs=1 skip=15 count=1 2>/dev/null | od -t u -A n | awk '{print $1}')
_debug "cpuid: leaf7 edx higher byte: $edx_hb (decimal)"
edx_bit26=$(( edx_hb & 8 ))
edx_bit26=$(( edx_hb & 4 ))
_debug "cpuid: edx_bit26=$edx_bit26"
if [ "$edx_bit26" -eq 8 ]; then
if [ "$edx_bit26" -eq 4 ]; then
pstatus green YES "SPEC_CTRL feature bit"
cpuid_spec_ctrl=1
else