tools: add a kernel-chktaint to tools/debugging
Add a script to the tools/ directory that shows if or why the running kernel was tainted. The script was mostly written by Randy Dunlap; I enhanced the script a bit. There does not appear to be a good home for this script. so create tools/debugging for tools of this nature. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info> [ jc: fixed conflicts, rewrote changelog ] Signed-off-by: Jonathan Corbet <corbet@lwn.net>hifive-unleashed-5.1
Thorsten Leemhuis
Jonathan Corbet
parent
8fe28cb58b
commit
4ab5a5d2a4
|
|
@ -12,6 +12,7 @@ help:
|
|||
@echo ' acpi - ACPI tools'
|
||||
@echo ' cgroup - cgroup tools'
|
||||
@echo ' cpupower - a tool for all things x86 CPU power'
|
||||
@echo ' debugging - tools for debugging'
|
||||
@echo ' firewire - the userspace part of nosy, an IEEE-1394 traffic sniffer'
|
||||
@echo ' freefall - laptop accelerometer program for disk protection'
|
||||
@echo ' gpio - GPIO tools'
|
||||
|
|
@ -60,7 +61,7 @@ acpi: FORCE
|
|||
cpupower: FORCE
|
||||
$(call descend,power/$@)
|
||||
|
||||
cgroup firewire hv guest spi usb virtio vm bpf iio gpio objtool leds wmi pci: FORCE
|
||||
cgroup firewire hv guest spi usb virtio vm bpf iio gpio objtool leds wmi pci debugging: FORCE
|
||||
$(call descend,$@)
|
||||
|
||||
liblockdep: FORCE
|
||||
|
|
@ -95,7 +96,8 @@ kvm_stat: FORCE
|
|||
all: acpi cgroup cpupower gpio hv firewire liblockdep \
|
||||
perf selftests spi turbostat usb \
|
||||
virtio vm bpf x86_energy_perf_policy \
|
||||
tmon freefall iio objtool kvm_stat wmi pci
|
||||
tmon freefall iio objtool kvm_stat wmi \
|
||||
pci debugging
|
||||
|
||||
acpi_install:
|
||||
$(call descend,power/$(@:_install=),install)
|
||||
|
|
@ -103,7 +105,7 @@ acpi_install:
|
|||
cpupower_install:
|
||||
$(call descend,power/$(@:_install=),install)
|
||||
|
||||
cgroup_install firewire_install gpio_install hv_install iio_install perf_install spi_install usb_install virtio_install vm_install bpf_install objtool_install wmi_install pci_install:
|
||||
cgroup_install firewire_install gpio_install hv_install iio_install perf_install spi_install usb_install virtio_install vm_install bpf_install objtool_install wmi_install pci_install debugging_install:
|
||||
$(call descend,$(@:_install=),install)
|
||||
|
||||
liblockdep_install:
|
||||
|
|
@ -129,7 +131,7 @@ install: acpi_install cgroup_install cpupower_install gpio_install \
|
|||
perf_install selftests_install turbostat_install usb_install \
|
||||
virtio_install vm_install bpf_install x86_energy_perf_policy_install \
|
||||
tmon_install freefall_install objtool_install kvm_stat_install \
|
||||
wmi_install pci_install
|
||||
wmi_install pci_install debugging_install
|
||||
|
||||
acpi_clean:
|
||||
$(call descend,power/acpi,clean)
|
||||
|
|
@ -137,7 +139,7 @@ acpi_clean:
|
|||
cpupower_clean:
|
||||
$(call descend,power/cpupower,clean)
|
||||
|
||||
cgroup_clean hv_clean firewire_clean spi_clean usb_clean virtio_clean vm_clean wmi_clean bpf_clean iio_clean gpio_clean objtool_clean leds_clean pci_clean:
|
||||
cgroup_clean hv_clean firewire_clean spi_clean usb_clean virtio_clean vm_clean wmi_clean bpf_clean iio_clean gpio_clean objtool_clean leds_clean pci_clean debugging_clean:
|
||||
$(call descend,$(@:_clean=),clean)
|
||||
|
||||
liblockdep_clean:
|
||||
|
|
@ -175,6 +177,6 @@ clean: acpi_clean cgroup_clean cpupower_clean hv_clean firewire_clean \
|
|||
perf_clean selftests_clean turbostat_clean spi_clean usb_clean virtio_clean \
|
||||
vm_clean bpf_clean iio_clean x86_energy_perf_policy_clean tmon_clean \
|
||||
freefall_clean build_clean libbpf_clean libsubcmd_clean liblockdep_clean \
|
||||
gpio_clean objtool_clean leds_clean wmi_clean pci_clean
|
||||
gpio_clean objtool_clean leds_clean wmi_clean pci_clean debugging_clean
|
||||
|
||||
.PHONY: FORCE
|
||||
|
|
|
|||
|
|
@ -0,0 +1,16 @@
|
|||
# SPDX-License-Identifier: GPL-2.0
|
||||
# Makefile for debugging tools
|
||||
|
||||
PREFIX ?= /usr
|
||||
BINDIR ?= bin
|
||||
INSTALL ?= install
|
||||
|
||||
TARGET = kernel-chktaint
|
||||
|
||||
all: $(TARGET)
|
||||
|
||||
clean:
|
||||
|
||||
install: kernel-chktaint
|
||||
$(INSTALL) -D -m 755 $(TARGET) $(DESTDIR)$(PREFIX)/$(BINDIR)/$(TARGET)
|
||||
|
||||
|
|
@ -0,0 +1,202 @@
|
|||
#! /bin/sh
|
||||
# SPDX-License-Identifier: GPL-2.0
|
||||
#
|
||||
# Randy Dunlap <rdunlap@infradead.org>, 2018
|
||||
# Thorsten Leemhuis <linux@leemhuis.info>, 2018
|
||||
|
||||
usage()
|
||||
{
|
||||
cat <<EOF
|
||||
usage: ${0##*/}
|
||||
${0##*/} <int>
|
||||
|
||||
Call without parameters to decode /proc/sys/kernel/tainted.
|
||||
|
||||
Call with a positive integer as parameter to decode a value you
|
||||
retrieved from /proc/sys/kernel/tainted on another system.
|
||||
|
||||
EOF
|
||||
}
|
||||
|
||||
if [ "$1"x != "x" ]; then
|
||||
if [ "$1"x == "--helpx" ] || [ "$1"x == "-hx" ] ; then
|
||||
usage
|
||||
exit 1
|
||||
elif [ $1 -ge 0 ] 2>/dev/null ; then
|
||||
taint=$1
|
||||
else
|
||||
echo "Error: Parameter '$1' not a positive interger. Aborting." >&2
|
||||
exit 1
|
||||
fi
|
||||
else
|
||||
TAINTFILE="/proc/sys/kernel/tainted"
|
||||
if [ ! -r $TAINTFILE ]; then
|
||||
echo "No file: $TAINTFILE"
|
||||
exit
|
||||
fi
|
||||
|
||||
taint=`cat $TAINTFILE`
|
||||
fi
|
||||
|
||||
if [ $taint -eq 0 ]; then
|
||||
echo "Kernel not Tainted"
|
||||
exit
|
||||
else
|
||||
echo "Kernel is \"tainted\" for the following reasons:"
|
||||
fi
|
||||
|
||||
T=$taint
|
||||
out=
|
||||
|
||||
addout() {
|
||||
out=$out$1
|
||||
}
|
||||
|
||||
if [ `expr $T % 2` -eq 0 ]; then
|
||||
addout "G"
|
||||
else
|
||||
addout "P"
|
||||
echo " * proprietary module was loaded (#0)"
|
||||
fi
|
||||
|
||||
T=`expr $T / 2`
|
||||
if [ `expr $T % 2` -eq 0 ]; then
|
||||
addout " "
|
||||
else
|
||||
addout "F"
|
||||
echo " * module was force loaded (#1)"
|
||||
fi
|
||||
|
||||
T=`expr $T / 2`
|
||||
if [ `expr $T % 2` -eq 0 ]; then
|
||||
addout " "
|
||||
else
|
||||
addout "S"
|
||||
echo " * SMP kernel oops on an officially SMP incapable processor (#2)"
|
||||
fi
|
||||
|
||||
T=`expr $T / 2`
|
||||
if [ `expr $T % 2` -eq 0 ]; then
|
||||
addout " "
|
||||
else
|
||||
addout "R"
|
||||
echo " * module was force unloaded (#3)"
|
||||
fi
|
||||
|
||||
T=`expr $T / 2`
|
||||
if [ `expr $T % 2` -eq 0 ]; then
|
||||
addout " "
|
||||
else
|
||||
addout "M"
|
||||
echo " * processor reported a Machine Check Exception (MCE) (#4)"
|
||||
fi
|
||||
|
||||
T=`expr $T / 2`
|
||||
if [ `expr $T % 2` -eq 0 ]; then
|
||||
addout " "
|
||||
else
|
||||
addout "B"
|
||||
echo " * bad page referenced or some unexpected page flags (#5)"
|
||||
fi
|
||||
|
||||
T=`expr $T / 2`
|
||||
if [ `expr $T % 2` -eq 0 ]; then
|
||||
addout " "
|
||||
else
|
||||
addout "U"
|
||||
echo " * taint requested by userspace application (#6)"
|
||||
fi
|
||||
|
||||
T=`expr $T / 2`
|
||||
if [ `expr $T % 2` -eq 0 ]; then
|
||||
addout " "
|
||||
else
|
||||
addout "D"
|
||||
echo " * kernel died recently, i.e. there was an OOPS or BUG (#7)"
|
||||
fi
|
||||
|
||||
T=`expr $T / 2`
|
||||
if [ `expr $T % 2` -eq 0 ]; then
|
||||
addout " "
|
||||
else
|
||||
addout "A"
|
||||
echo " * an ACPI table was overridden by user (#8)"
|
||||
fi
|
||||
|
||||
T=`expr $T / 2`
|
||||
if [ `expr $T % 2` -eq 0 ]; then
|
||||
addout " "
|
||||
else
|
||||
addout "W"
|
||||
echo " * kernel issued warning (#9)"
|
||||
fi
|
||||
|
||||
T=`expr $T / 2`
|
||||
if [ `expr $T % 2` -eq 0 ]; then
|
||||
addout " "
|
||||
else
|
||||
addout "C"
|
||||
echo " * staging driver was loaded (#10)"
|
||||
fi
|
||||
|
||||
T=`expr $T / 2`
|
||||
if [ `expr $T % 2` -eq 0 ]; then
|
||||
addout " "
|
||||
else
|
||||
addout "I"
|
||||
echo " * workaround for bug in platform firmware applied (#11)"
|
||||
fi
|
||||
|
||||
T=`expr $T / 2`
|
||||
if [ `expr $T % 2` -eq 0 ]; then
|
||||
addout " "
|
||||
else
|
||||
addout "O"
|
||||
echo " * externally-built ('out-of-tree') module was loaded (#12)"
|
||||
fi
|
||||
|
||||
T=`expr $T / 2`
|
||||
if [ `expr $T % 2` -eq 0 ]; then
|
||||
addout " "
|
||||
else
|
||||
addout "E"
|
||||
echo " * unsigned module was loaded (#13)"
|
||||
fi
|
||||
|
||||
T=`expr $T / 2`
|
||||
if [ `expr $T % 2` -eq 0 ]; then
|
||||
addout " "
|
||||
else
|
||||
addout "L"
|
||||
echo " * soft lockup occurred (#14)"
|
||||
fi
|
||||
|
||||
T=`expr $T / 2`
|
||||
if [ `expr $T % 2` -eq 0 ]; then
|
||||
addout " "
|
||||
else
|
||||
addout "K"
|
||||
echo " * kernel has been live patched (#15)"
|
||||
fi
|
||||
|
||||
T=`expr $T / 2`
|
||||
if [ `expr $T % 2` -eq 0 ]; then
|
||||
addout " "
|
||||
else
|
||||
addout "X"
|
||||
echo " * auxiliary taint, defined for and used by distros (#16)"
|
||||
|
||||
fi
|
||||
T=`expr $T / 2`
|
||||
if [ `expr $T % 2` -eq 0 ]; then
|
||||
addout " "
|
||||
else
|
||||
addout "T"
|
||||
echo " * kernel was built with the struct randomization plugin (#17)"
|
||||
fi
|
||||
|
||||
echo "For a more detailed explanation of the various taint flags see"
|
||||
echo " Documentation/admin-guide/tainted-kernels.rst in the the Linux kernel sources"
|
||||
echo " or https://kernel.org/doc/html/latest/admin-guide/tainted-kernels.html"
|
||||
echo "Raw taint value as int/string: $taint/'$out'"
|
||||
#EOF#
|
||||
Loading…
Reference in New Issue