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https://github.com/speed47/spectre-meltdown-checker.git
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misc: message clarifications
This commit is contained in:
Stéphane Lesimple
parent
ece25b98a1
commit
28da7a0103
@ -43,24 +43,27 @@ show_usage()
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Second mode is the "offline" mode, where you can inspect a non-running kernel.
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You'll need to specify the location of the vmlinux file, config and System.map files:
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--kernel kernel_file Specify a (possibly compressed) Linux or BSD kernel file
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--config kernel_config Specify a kernel config file (Linux only)
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--map kernel_map_file Specify a kernel System.map file (Linux only)
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--kernel kernel_file specify a (possibly compressed) Linux or BSD kernel file
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--config kernel_config specify a kernel config file (Linux only)
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--map kernel_map_file specify a kernel System.map file (Linux only)
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Options:
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--no-color Don't use color codes
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--verbose, -v Increase verbosity level
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--no-sysfs Don't use the /sys interface even if present
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--sysfs-only Only use the /sys interface, don't run our own checks
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--coreos Special mode for CoreOS (use an ephemeral toolbox to inspect kernel)
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--arch-prefix PREFIX Specify a prefix for cross-inspecting a kernel of a different arch, for example "aarch64-linux-gnu-",
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so that invoked tools such as objdump will be prefixed with this (i.e. aarch64-linux-gnu-objdump)
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--batch text Produce machine readable output, this is the default if --batch is specified alone
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--batch json Produce JSON output formatted for Puppet, Ansible, Chef...
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--batch nrpe Produce machine readable output formatted for NRPE
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--batch prometheus Produce output for consumption by prometheus-node-exporter
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--variant [1,2,3] Specify which variant you'd like to check, by default all variants are checked
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Can be specified multiple times (e.g. --variant 2 --variant 3)
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--no-color don't use color codes
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--verbose, -v increase verbosity level, possibly several times
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--no-sysfs don't use the /sys interface even if present [Linux]
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--sysfs-only only use the /sys interface, don't run our own checks [Linux]
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--coreos special mode for CoreOS (use an ephemeral toolbox to inspect kernel) [Linux]
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--arch-prefix PREFIX specify a prefix for cross-inspecting a kernel of a different arch, for example "aarch64-linux-gnu-",
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so that invoked tools will be prefixed with this (i.e. aarch64-linux-gnu-objdump)
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--batch text produce machine readable output, this is the default if --batch is specified alone
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--batch json produce JSON output formatted for Puppet, Ansible, Chef...
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--batch nrpe produce machine readable output formatted for NRPE
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--batch prometheus produce output for consumption by prometheus-node-exporter
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--variant [1,2,3] specify which variant you'd like to check, by default all variants are checked,
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can be specified multiple times (e.g. --variant 2 --variant 3)
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Return codes:
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0 (not vulnerable), 2 (vulnerable), 3 (unknown), 255 (error)
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@ -1313,7 +1316,7 @@ 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 yellow UNKNOWN "couldn't read MSR, is MSR support enabled in your kernel?"
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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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@ -1355,7 +1358,7 @@ 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 [ $ret -eq 2 ]; then
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pstatus yellow UNKNOWN "couldn't read /dev/cpu/0/cpuid, is cpuid support enabled in your kernel?"
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pstatus yellow UNKNOWN "is cpuid kernel module available?"
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else
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pstatus red NO
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fi
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@ -1381,7 +1384,7 @@ check_cpu()
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_info " * Indirect Branch Prediction Barrier (IBPB)"
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_info_nol " * PRED_CMD MSR is available: "
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if [ ! -e /dev/cpu/0/msr ] && [ ! -e /dev/cpuctl0 ]; then
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pstatus yellow UNKNOWN "couldn't read /dev/cpu/0/msr, is msr support enabled in your kernel?"
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pstatus yellow UNKNOWN "is msr kernel module available?"
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else
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# the new MSR 'PRED_CTRL' is at offset 0x49, write-only
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# here we use dd, it's the same as using 'wrmsr 0x49 0' but without needing the wrmsr tool
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@ -1421,7 +1424,7 @@ check_cpu()
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elif [ "$cpuid_spec_ctrl" = 1 ]; then
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pstatus green YES "SPEC_CTRL feature bit"
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elif [ $ret -eq 2 ]; then
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pstatus yellow UNKNOWN "couldn't read /dev/cpu/0/cpuid, is cpuid support enabled in your kernel?"
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pstatus yellow UNKNOWN "is cpuid kernel module available?"
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else
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pstatus red NO
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fi
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@ -1434,7 +1437,7 @@ check_cpu()
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elif [ "$spec_ctrl_msr" = 0 ]; then
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pstatus red NO
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else
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pstatus yellow UNKNOWN "couldn't read /dev/cpu/0/msr, is msr support enabled in your kernel?"
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pstatus yellow UNKNOWN "is cpuid kernel module available?"
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fi
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_info_nol " * CPU indicates STIBP capability: "
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@ -1443,7 +1446,7 @@ check_cpu()
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if [ $ret -eq 0 ]; then
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pstatus green YES
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elif [ $ret -eq 2 ]; then
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pstatus yellow UNKNOWN "couldn't read /dev/cpu/0/cpuid, is cpuid support enabled in your kernel?"
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pstatus yellow UNKNOWN "is cpuid kernel module available?"
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else
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pstatus red NO
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fi
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@ -1457,7 +1460,7 @@ check_cpu()
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pstatus green YES
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cpuid_arch_capabilities=1
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elif [ $ret -eq 2 ]; then
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pstatus yellow UNKNOWN "couldn't read /dev/cpu/0/cpuid, is cpuid support enabled in your kernel?"
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pstatus yellow UNKNOWN "is cpuid kernel module available?"
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else
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pstatus red NO
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cpuid_arch_capabilities=0
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@ -1474,7 +1477,7 @@ check_cpu()
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pstatus red NO
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elif [ ! -e /dev/cpu/0/msr ] && [ ! -e /dev/cpuctl0 ]; then
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spec_ctrl_msr=-1
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pstatus yellow UNKNOWN "couldn't read /dev/cpu/0/msr, is msr support enabled in your kernel?"
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pstatus yellow UNKNOWN "is msr kernel module available?"
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else
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# the new MSR 'ARCH_CAPABILITIES' is at offset 0x10a
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# here we use dd, it's the same as using 'rdmsr 0x10a' but without needing the rdmsr tool
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@ -1544,7 +1547,7 @@ check_cpu()
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check_cpu_vulnerabilities()
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{
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_info "* CPU vulnerability to the three speculative execution attacks variants"
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_info "* CPU vulnerability to the three speculative execution attack variants"
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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 $v; then
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@ -2225,7 +2228,7 @@ check_variant3_linux()
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if [ "$xen_pv_domu" = 1 ]; then
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pstatus red YES
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else
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pstatus green NO
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pstatus blue NO
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fi
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fi
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