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https://github.com/speed47/spectre-meltdown-checker.git
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feat: use --live with --kernel/--config/--map to override file detection in live mode
This commit is contained in:
Stéphane Lesimple
parent
cb279a49ec
commit
9911c243b2
@ -41,8 +41,9 @@ show_usage()
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# shellcheck disable=SC2086
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cat <<EOF
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Usage:
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Live mode: $(basename $0) [options] [--live]
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Offline mode: $(basename $0) [options] [--kernel <kernel_file>] [--config <kernel_config>] [--map <kernel_map_file>]
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Live mode (auto): $(basename $0) [options]
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Live mode (manual): $(basename $0) [options] <[--kernel <kimage>] [--config <kconfig>] [--map <mapfile>]> --live
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Offline mode: $(basename $0) [options] <[--kernel <kimage>] [--config <kconfig>] [--map <mapfile>]>
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Modes:
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Two modes are available.
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@ -51,12 +52,16 @@ show_usage()
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To run under this mode, just start the script without any option (you can also use --live explicitly)
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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 kernel file, config and System.map files:
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This mode is automatically enabled when you specify the location of the kernel 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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If you want to use live mode while specifying the location of the kernel, config or map file yourself,
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you can add --live to the above options, to tell the script to run in live mode instead of the offline mode,
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which is enabled by default when at least one file is specified on the command line.
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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, possibly several times
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@ -134,8 +139,7 @@ os=$(uname -s)
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opt_kernel=''
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opt_config=''
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opt_map=''
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opt_live_explicit=0
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opt_live=1
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opt_live=-1
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opt_no_color=0
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opt_batch=0
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opt_batch_format='text'
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@ -796,22 +800,19 @@ while [ -n "$1" ]; do
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opt_kernel=$(parse_opt_file kernel "$2"); ret=$?
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[ $ret -ne 0 ] && exit 255
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shift 2
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opt_live=0
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elif [ "$1" = "--config" ]; then
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opt_config=$(parse_opt_file config "$2"); ret=$?
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[ $ret -ne 0 ] && exit 255
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shift 2
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opt_live=0
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elif [ "$1" = "--map" ]; then
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opt_map=$(parse_opt_file map "$2"); ret=$?
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[ $ret -ne 0 ] && exit 255
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shift 2
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opt_live=0
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elif [ "$1" = "--arch-prefix" ]; then
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opt_arch_prefix="$2"
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shift 2
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elif [ "$1" = "--live" ]; then
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opt_live_explicit=1
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opt_live=1
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shift
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elif [ "$1" = "--no-color" ]; then
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opt_no_color=1
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@ -954,6 +955,15 @@ if [ "$opt_no_hw" = 1 ] && [ "$opt_hw_only" = 1 ]; then
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exit 255
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fi
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if [ "$opt_live" = -1 ]; then
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if [ -n "$opt_kernel" ] || [ -n "$opt_config" ] || [ -n "$opt_map" ]; then
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# no --live specified and we have a least one of the kernel/config/map files on the cmdline: offline mode
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opt_live=0
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else
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opt_live=1
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fi
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fi
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# print status function
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pstatus()
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{
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@ -1722,13 +1732,6 @@ if uname -a | grep -qE -- '-Microsoft #[0-9]+-Microsoft '; then
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fi
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# check for mode selection inconsistency
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if [ "$opt_live_explicit" = 1 ]; then
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if [ -n "$opt_kernel" ] || [ -n "$opt_config" ] || [ -n "$opt_map" ]; then
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show_usage
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echo "$0: error: incompatible modes specified, use either --live or --kernel/--config/--map" >&2
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exit 255
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fi
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fi
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if [ "$opt_hw_only" = 1 ]; then
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if [ "$opt_cve_all" = 0 ]; then
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show_usage
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@ -1795,8 +1798,11 @@ if [ "$opt_live" = 1 ]; then
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_info "CPU is \033[35m$cpu_friendly_name\033[0m"
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# try to find the image of the current running kernel
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if [ -n "$opt_kernel" ]; then
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# specified by user on cmdline, with --live, don't override
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:
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# first, look for the BOOT_IMAGE hint in the kernel cmdline
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if [ -r "$procfs/cmdline" ] && grep -q 'BOOT_IMAGE=' "$procfs/cmdline"; then
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elif [ -r "$procfs/cmdline" ] && grep -q 'BOOT_IMAGE=' "$procfs/cmdline"; then
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opt_kernel=$(grep -Eo 'BOOT_IMAGE=[^ ]+' "$procfs/cmdline" | cut -d= -f2)
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_debug "found opt_kernel=$opt_kernel in $procfs/cmdline"
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# if the boot partition is within a btrfs subvolume, strip the subvolume name
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@ -1843,7 +1849,10 @@ if [ "$opt_live" = 1 ]; then
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fi
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# system.map
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if [ -e "$procfs/kallsyms" ] ; then
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if [ -n "$opt_map" ]; then
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# specified by user on cmdline, with --live, don't override
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:
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elif [ -e "$procfs/kallsyms" ] ; then
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opt_map="$procfs/kallsyms"
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elif [ -e "/lib/modules/$(uname -r)/System.map" ] ; then
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opt_map="/lib/modules/$(uname -r)/System.map"
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@ -1854,7 +1863,10 @@ if [ "$opt_live" = 1 ]; then
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fi
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# config
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if [ -e "$procfs/config.gz" ] ; then
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if [ -n "$opt_config" ]; then
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# specified by user on cmdline, with --live, don't override
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:
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elif [ -e "$procfs/config.gz" ] ; then
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dumped_config="$(mktemp /tmp/config-XXXXXX)"
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gunzip -c "$procfs/config.gz" > "$dumped_config"
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# dumped_config will be deleted at the end of the script
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