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feat: blacklist some more microcodes (fixes #475) #484

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Jan 9, 2024
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feat: blacklist some more microcodes (fixes #475) #484

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20 changes: 18 additions & 2 deletions spectre-meltdown-checker.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -2280,7 +2280,7 @@ parse_cpu_details()
fi

# get raw cpuid, it's always useful (referenced in the Intel doc for firmware updates for example)
if read_cpuid 0x1 0x0 $EAX 0 0xFFFFFFFF; then
if [ "$mocked" != 1 ] && read_cpuid 0x1 0x0 $EAX 0 0xFFFFFFFF; then
cpu_cpuid="$read_cpuid_value"
else
# try to build it by ourselves
Expand Down Expand Up @@ -2476,6 +2476,22 @@ is_ucode_blacklisted()
fi
fi
done

# 2024-01-09 update: https://github.com/speed47/spectre-meltdown-checker/issues/475
# this time the tuple is cpuid,microcode
for tuple in \
0xB0671,0x119 \
0xB06A2,0x4119 \
0xB06A3,0x4119
do
cpuid=$(( $(echo "$tuple" | cut -d, -f1) ))
ucode=$(( $(echo "$tuple" | cut -d, -f2) ))
if [ "$cpu_cpuid" = "$cpuid" ] && [ "$cpu_ucode" = "$ucode" ]; then
_debug "is_ucode_blacklisted: we have a match! ($cpuid/$ucode)"
return 0
fi
done

_debug "is_ucode_blacklisted: no ($cpu_model/$cpu_stepping/$cpu_ucode)"
return 1
}
Expand Down Expand Up @@ -3749,7 +3765,7 @@ check_cpu()
_warn "The microcode your CPU is running on is known to cause instability problems,"
_warn "such as intempestive reboots or random crashes."
_warn "You are advised to either revert to a previous microcode version (that might not have"
_warn "the mitigations for Spectre), or upgrade to a newer one if available."
_warn "the mitigations for recent vulnerabilities), or upgrade to a newer one if available."
_warn
else
pstatus blue NO "$ucode_found"
Expand Down