#! /bin/sh
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# SPDX-License-Identifier: GPL-2.0
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#
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# Randy Dunlap <rdunlap@infradead.org>, 2018
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# Thorsten Leemhuis <linux@leemhuis.info>, 2018
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usage()
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{
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cat <<EOF
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usage: ${0##*/}
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${0##*/} <int>
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Call without parameters to decode /proc/sys/kernel/tainted.
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Call with a positive integer as parameter to decode a value you
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retrieved from /proc/sys/kernel/tainted on another system.
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EOF
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}
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if [ "$1"x != "x" ]; then
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if [ "$1"x == "--helpx" ] || [ "$1"x == "-hx" ] ; then
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usage
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exit 1
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elif [ $1 -ge 0 ] 2>/dev/null ; then
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taint=$1
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else
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echo "Error: Parameter '$1' not a positive interger. Aborting." >&2
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exit 1
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fi
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else
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TAINTFILE="/proc/sys/kernel/tainted"
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if [ ! -r $TAINTFILE ]; then
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echo "No file: $TAINTFILE"
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exit
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fi
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taint=`cat $TAINTFILE`
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fi
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if [ $taint -eq 0 ]; then
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echo "Kernel not Tainted"
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exit
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else
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echo "Kernel is \"tainted\" for the following reasons:"
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fi
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T=$taint
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out=
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addout() {
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out=$out$1
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}
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if [ `expr $T % 2` -eq 0 ]; then
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addout "G"
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else
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addout "P"
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echo " * proprietary module was loaded (#0)"
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fi
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T=`expr $T / 2`
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if [ `expr $T % 2` -eq 0 ]; then
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addout " "
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else
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addout "F"
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echo " * module was force loaded (#1)"
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fi
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T=`expr $T / 2`
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if [ `expr $T % 2` -eq 0 ]; then
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addout " "
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else
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addout "S"
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echo " * SMP kernel oops on an officially SMP incapable processor (#2)"
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fi
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T=`expr $T / 2`
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if [ `expr $T % 2` -eq 0 ]; then
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addout " "
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else
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addout "R"
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echo " * module was force unloaded (#3)"
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fi
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T=`expr $T / 2`
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if [ `expr $T % 2` -eq 0 ]; then
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addout " "
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else
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addout "M"
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echo " * processor reported a Machine Check Exception (MCE) (#4)"
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fi
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T=`expr $T / 2`
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if [ `expr $T % 2` -eq 0 ]; then
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addout " "
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else
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addout "B"
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echo " * bad page referenced or some unexpected page flags (#5)"
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fi
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T=`expr $T / 2`
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if [ `expr $T % 2` -eq 0 ]; then
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addout " "
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else
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addout "U"
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echo " * taint requested by userspace application (#6)"
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fi
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T=`expr $T / 2`
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if [ `expr $T % 2` -eq 0 ]; then
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addout " "
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else
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addout "D"
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echo " * kernel died recently, i.e. there was an OOPS or BUG (#7)"
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fi
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T=`expr $T / 2`
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if [ `expr $T % 2` -eq 0 ]; then
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addout " "
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else
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addout "A"
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echo " * an ACPI table was overridden by user (#8)"
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fi
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T=`expr $T / 2`
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if [ `expr $T % 2` -eq 0 ]; then
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addout " "
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else
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addout "W"
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echo " * kernel issued warning (#9)"
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fi
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T=`expr $T / 2`
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if [ `expr $T % 2` -eq 0 ]; then
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addout " "
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else
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addout "C"
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echo " * staging driver was loaded (#10)"
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fi
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T=`expr $T / 2`
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if [ `expr $T % 2` -eq 0 ]; then
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addout " "
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else
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addout "I"
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echo " * workaround for bug in platform firmware applied (#11)"
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fi
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T=`expr $T / 2`
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if [ `expr $T % 2` -eq 0 ]; then
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addout " "
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else
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addout "O"
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echo " * externally-built ('out-of-tree') module was loaded (#12)"
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fi
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T=`expr $T / 2`
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if [ `expr $T % 2` -eq 0 ]; then
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addout " "
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else
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addout "E"
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echo " * unsigned module was loaded (#13)"
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fi
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T=`expr $T / 2`
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if [ `expr $T % 2` -eq 0 ]; then
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addout " "
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else
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addout "L"
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echo " * soft lockup occurred (#14)"
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fi
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T=`expr $T / 2`
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if [ `expr $T % 2` -eq 0 ]; then
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addout " "
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else
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addout "K"
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echo " * kernel has been live patched (#15)"
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fi
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T=`expr $T / 2`
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if [ `expr $T % 2` -eq 0 ]; then
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addout " "
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else
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addout "X"
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echo " * auxiliary taint, defined for and used by distros (#16)"
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fi
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T=`expr $T / 2`
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if [ `expr $T % 2` -eq 0 ]; then
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addout " "
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else
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addout "T"
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echo " * kernel was built with the struct randomization plugin (#17)"
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fi
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echo "For a more detailed explanation of the various taint flags see"
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echo " Documentation/admin-guide/tainted-kernels.rst in the the Linux kernel sources"
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echo " or https://kernel.org/doc/html/latest/admin-guide/tainted-kernels.html"
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echo "Raw taint value as int/string: $taint/'$out'"
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#EOF#
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