#! /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#