GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-27 17:11:46 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

tools: add a kernel-chktaint to tools/debugging

Browse source 
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>
This commit is contained in:
Thorsten Leemhuis 2019-01-08 20:40:06 +01:00 • committed by Jonathan Corbet
parent 8fe28cb58b
commit 4ab5a5d2a4
3 changed files with 226 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

16
tools/debugging/Makefile Normal file
View file

@ -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)

202
tools/debugging/kernel-chktaint Executable file
View file

@ -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#