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feat(retpoline): check if retpoline is enabled

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Before we would just check if retpoline was compiled
in, now we also check that it's enabled at runtime
(only in live mode)
This commit is contained in:
Stéphane Lesimple 2018-01-21 18:07:25 +01:00
parent ff5c92fa6f
commit e7aa3b9d16
1 changed files with 14 additions and 0 deletions
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14
spectre-meltdown-checker.sh
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@ -1162,6 +1162,20 @@ check_variant2()
else
pstatus yellow UNKNOWN "couldn't find your kernel image or System.map"
fi
_info_nol "* Retpoline enabled: "
if [ "$opt_live" = 1 ]; then
# kernel adds this flag when retpoline is supported and enabled,
# regardless of the fact that it's minimal / full and generic / amd
if grep -qw retpoline /proc/cpuinfo; then
pstatus green YES
retpoline_enabled=1
else
pstatus red NO
fi
else
pstatus blue N/A "can't check this in offline mode"
fi
elif [ "$sys_interface_available" = 0 ]; then
# we have no sysfs but were asked to use it only!
msg="/sys vulnerability interface use forced, but it's not available!"