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https://github.com/speed47/spectre-meltdown-checker
synced 2024-12-23 04:43:37 +01:00
enh: change colors and use red only to report vulnerability
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@ -1249,7 +1249,7 @@ sys_interface_check()
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pstatus yellow NO "kernel confirms your system is vulnerable"
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else
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status=UNK
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pstatus blue UNKNOWN "unknown value reported by kernel"
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pstatus yellow UNKNOWN "unknown value reported by kernel"
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fi
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msg=$(cat "$1")
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_debug "sys_interface_check: $1=$msg"
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@ -1278,8 +1278,12 @@ write_msr()
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else
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# convert to decimal
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_msrindex=$(( $1 ))
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if [ ! -w /dev/cpu/"$2"/msr ]; then
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ret=200 # permission error
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else
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dd if=/dev/zero of=/dev/cpu/"$2"/msr bs=8 count=1 seek="$_msrindex" oflag=seek_bytes 2>/dev/null; ret=$?
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fi
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fi
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_debug "write_msr: for cpu $2 on msr $1 ($_msrindex), ret=$ret"
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return $ret
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}
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@ -1301,6 +1305,9 @@ read_msr()
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else
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# convert to decimal
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_msrindex=$(( $1 ))
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if [ ! -r /dev/cpu/"$2"/msr ]; then
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return 200 # permission error
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fi
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if ! dd if=/dev/cpu/"$2"/msr bs=8 count=1 skip="$_msrindex" iflag=skip_bytes 2>/dev/null; then
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return 1
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fi
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@ -1331,7 +1338,7 @@ check_cpu()
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fi
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if [ ! -e /dev/cpu/0/msr ] && [ ! -e /dev/cpuctl0 ]; then
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spec_ctrl_msr=-1
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pstatus blue UNKNOWN "is msr kernel module available?"
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pstatus yellow UNKNOWN "is msr kernel module available?"
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else
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# the new MSR 'SPEC_CTRL' is at offset 0x48
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# here we use dd, it's the same as using 'rdmsr 0x48' but without needing the rdmsr tool
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@ -1360,6 +1367,9 @@ check_cpu()
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spec_ctrl_msr=1
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pstatus green YES "But not in all CPUs"
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fi
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elif [ $val -eq 200 ]; then
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pstatus yellow UNKNOWN "is msr kernel module available?"
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spec_ctrl_msr=-1
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else
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spec_ctrl_msr=0
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pstatus yellow NO
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@ -1373,7 +1383,7 @@ check_cpu()
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pstatus green YES "SPEC_CTRL feature bit"
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cpuid_spec_ctrl=1
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elif [ $ret -eq 2 ]; then
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pstatus blue UNKNOWN "is cpuid kernel module available?"
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pstatus yellow UNKNOWN "is cpuid kernel module available?"
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else
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pstatus yellow NO
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fi
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@ -1386,7 +1396,7 @@ check_cpu()
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_verbose_nol " * Kernel has set the spec_ctrl flag in cpuinfo: "
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if [ "$opt_live" = 1 ]; then
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if grep ^flags "$procfs/cpuinfo" | grep -qw spec_ctrl; then
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pstatus green YES
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pstatus blue YES
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else
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pstatus blue NO
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fi
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@ -1426,6 +1436,8 @@ check_cpu()
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else
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pstatus green YES "But not in all CPUs"
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fi
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elif [ $val -eq 200 ]; then
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pstatus yellow UNKNOWN "is msr kernel module available?"
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else
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pstatus yellow NO
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fi
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@ -1452,7 +1464,7 @@ check_cpu()
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elif [ "$spec_ctrl_msr" = 0 ]; then
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pstatus yellow NO
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else
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pstatus yellow UNKNOWN "is cpuid kernel module available?"
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pstatus yellow UNKNOWN "is msr kernel module available?"
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fi
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_info_nol " * CPU indicates STIBP capability: "
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@ -1532,8 +1544,10 @@ check_cpu()
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else
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pstatus yellow NO
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fi
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elif [ $val -eq 200 ]; then
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pstatus yellow UNKNOWN "is msr kernel module available?"
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else
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pstatus yellow UNKNOWN
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pstatus yellow NO
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fi
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fi
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@ -1543,7 +1557,7 @@ check_cpu()
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elif [ "$capabilities_rdcl_no" = 1 ]; then
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pstatus green YES
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else
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pstatus blue NO
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pstatus yellow NO
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fi
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_info_nol " * CPU microcode is known to cause stability problems: "
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@ -1566,7 +1580,7 @@ check_cpu_vulnerabilities()
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for v in 1 2 3; do
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_info_nol " * Vulnerable to Variant $v: "
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if is_cpu_vulnerable $v; then
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pstatus red YES
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pstatus yellow YES
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else
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pstatus green NO
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fi
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@ -2241,7 +2255,7 @@ check_variant3_linux()
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# (unless we are a Dom0)
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_info_nol "* Running as a Xen PV DomU: "
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if [ "$xen_pv_domu" = 1 ]; then
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pstatus red YES
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pstatus yellow YES
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else
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pstatus blue NO
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fi
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