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feat: detect RSB filling capability in the kernel

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Stéphane Lesimple 2018-04-15 20:55:01 +02:00
parent baaefb0c31
commit 59d85b39c9
1 changed files with 16 additions and 0 deletions
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16
spectre-meltdown-checker.sh
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@ -2293,6 +2293,22 @@ check_variant2_linux()
fi
fi
if is_skylake_cpu; then
_info_nol " * Kernel supports RSB filling: "
if ! which "${opt_arch_prefix}strings" >/dev/null 2>&1; then
pstatus yellow UNKNOWN "missing '${opt_arch_prefix}strings' tool, please install it, usually it's in the binutils package"
elif [ -z "$kernel" ]; then
pstatus yellow UNKNOWN "kernel image missing"
else
rsb_filling=$("${opt_arch_prefix}strings" "$kernel" | grep -w 'Filling RSB on context switch')
if [ -n "$rsb_filling" ]; then
pstatus green YES
else
pstatus yellow NO
fi
fi
fi
elif [ "$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!"