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| 1 | +#! /bin/sh |
| 2 | +# SPDX-License-Identifier: GPL-2.0 |
| 3 | +# |
| 4 | +# Randy Dunlap <[email protected]>, 2018 |
| 5 | +# Thorsten Leemhuis <[email protected]>, 2018 |
| 6 | + |
| 7 | +usage() |
| 8 | +{ |
| 9 | + cat <<EOF |
| 10 | +usage: ${0##*/} |
| 11 | + ${0##*/} <int> |
| 12 | +
|
| 13 | +Call without parameters to decode /proc/sys/kernel/tainted. |
| 14 | +
|
| 15 | +Call with a positive integer as parameter to decode a value you |
| 16 | +retrieved from /proc/sys/kernel/tainted on another system. |
| 17 | +
|
| 18 | +EOF |
| 19 | +} |
| 20 | + |
| 21 | +if [ "$1"x != "x" ]; then |
| 22 | + if [ "$1"x == "--helpx" ] || [ "$1"x == "-hx" ] ; then |
| 23 | + usage |
| 24 | + exit 1 |
| 25 | + elif [ $1 -ge 0 ] 2>/dev/null ; then |
| 26 | + taint=$1 |
| 27 | + else |
| 28 | + echo "Error: Parameter '$1' not a positive interger. Aborting." >&2 |
| 29 | + exit 1 |
| 30 | + fi |
| 31 | +else |
| 32 | + TAINTFILE="/proc/sys/kernel/tainted" |
| 33 | + if [ ! -r $TAINTFILE ]; then |
| 34 | + echo "No file: $TAINTFILE" |
| 35 | + exit |
| 36 | + fi |
| 37 | + |
| 38 | + taint=`cat $TAINTFILE` |
| 39 | +fi |
| 40 | + |
| 41 | +if [ $taint -eq 0 ]; then |
| 42 | + echo "Kernel not Tainted" |
| 43 | + exit |
| 44 | +else |
| 45 | + echo "Kernel is \"tainted\" for the following reasons:" |
| 46 | +fi |
| 47 | + |
| 48 | +T=$taint |
| 49 | +out= |
| 50 | + |
| 51 | +addout() { |
| 52 | + out=$out$1 |
| 53 | +} |
| 54 | + |
| 55 | +if [ `expr $T % 2` -eq 0 ]; then |
| 56 | + addout "G" |
| 57 | +else |
| 58 | + addout "P" |
| 59 | + echo " * proprietary module was loaded (#0)" |
| 60 | +fi |
| 61 | + |
| 62 | +T=`expr $T / 2` |
| 63 | +if [ `expr $T % 2` -eq 0 ]; then |
| 64 | + addout " " |
| 65 | +else |
| 66 | + addout "F" |
| 67 | + echo " * module was force loaded (#1)" |
| 68 | +fi |
| 69 | + |
| 70 | +T=`expr $T / 2` |
| 71 | +if [ `expr $T % 2` -eq 0 ]; then |
| 72 | + addout " " |
| 73 | +else |
| 74 | + addout "S" |
| 75 | + echo " * SMP kernel oops on an officially SMP incapable processor (#2)" |
| 76 | +fi |
| 77 | + |
| 78 | +T=`expr $T / 2` |
| 79 | +if [ `expr $T % 2` -eq 0 ]; then |
| 80 | + addout " " |
| 81 | +else |
| 82 | + addout "R" |
| 83 | + echo " * module was force unloaded (#3)" |
| 84 | +fi |
| 85 | + |
| 86 | +T=`expr $T / 2` |
| 87 | +if [ `expr $T % 2` -eq 0 ]; then |
| 88 | + addout " " |
| 89 | +else |
| 90 | + addout "M" |
| 91 | + echo " * processor reported a Machine Check Exception (MCE) (#4)" |
| 92 | +fi |
| 93 | + |
| 94 | +T=`expr $T / 2` |
| 95 | +if [ `expr $T % 2` -eq 0 ]; then |
| 96 | + addout " " |
| 97 | +else |
| 98 | + addout "B" |
| 99 | + echo " * bad page referenced or some unexpected page flags (#5)" |
| 100 | +fi |
| 101 | + |
| 102 | +T=`expr $T / 2` |
| 103 | +if [ `expr $T % 2` -eq 0 ]; then |
| 104 | + addout " " |
| 105 | +else |
| 106 | + addout "U" |
| 107 | + echo " * taint requested by userspace application (#6)" |
| 108 | +fi |
| 109 | + |
| 110 | +T=`expr $T / 2` |
| 111 | +if [ `expr $T % 2` -eq 0 ]; then |
| 112 | + addout " " |
| 113 | +else |
| 114 | + addout "D" |
| 115 | + echo " * kernel died recently, i.e. there was an OOPS or BUG (#7)" |
| 116 | +fi |
| 117 | + |
| 118 | +T=`expr $T / 2` |
| 119 | +if [ `expr $T % 2` -eq 0 ]; then |
| 120 | + addout " " |
| 121 | +else |
| 122 | + addout "A" |
| 123 | + echo " * an ACPI table was overridden by user (#8)" |
| 124 | +fi |
| 125 | + |
| 126 | +T=`expr $T / 2` |
| 127 | +if [ `expr $T % 2` -eq 0 ]; then |
| 128 | + addout " " |
| 129 | +else |
| 130 | + addout "W" |
| 131 | + echo " * kernel issued warning (#9)" |
| 132 | +fi |
| 133 | + |
| 134 | +T=`expr $T / 2` |
| 135 | +if [ `expr $T % 2` -eq 0 ]; then |
| 136 | + addout " " |
| 137 | +else |
| 138 | + addout "C" |
| 139 | + echo " * staging driver was loaded (#10)" |
| 140 | +fi |
| 141 | + |
| 142 | +T=`expr $T / 2` |
| 143 | +if [ `expr $T % 2` -eq 0 ]; then |
| 144 | + addout " " |
| 145 | +else |
| 146 | + addout "I" |
| 147 | + echo " * workaround for bug in platform firmware applied (#11)" |
| 148 | +fi |
| 149 | + |
| 150 | +T=`expr $T / 2` |
| 151 | +if [ `expr $T % 2` -eq 0 ]; then |
| 152 | + addout " " |
| 153 | +else |
| 154 | + addout "O" |
| 155 | + echo " * externally-built ('out-of-tree') module was loaded (#12)" |
| 156 | +fi |
| 157 | + |
| 158 | +T=`expr $T / 2` |
| 159 | +if [ `expr $T % 2` -eq 0 ]; then |
| 160 | + addout " " |
| 161 | +else |
| 162 | + addout "E" |
| 163 | + echo " * unsigned module was loaded (#13)" |
| 164 | +fi |
| 165 | + |
| 166 | +T=`expr $T / 2` |
| 167 | +if [ `expr $T % 2` -eq 0 ]; then |
| 168 | + addout " " |
| 169 | +else |
| 170 | + addout "L" |
| 171 | + echo " * soft lockup occurred (#14)" |
| 172 | +fi |
| 173 | + |
| 174 | +T=`expr $T / 2` |
| 175 | +if [ `expr $T % 2` -eq 0 ]; then |
| 176 | + addout " " |
| 177 | +else |
| 178 | + addout "K" |
| 179 | + echo " * kernel has been live patched (#15)" |
| 180 | +fi |
| 181 | + |
| 182 | +T=`expr $T / 2` |
| 183 | +if [ `expr $T % 2` -eq 0 ]; then |
| 184 | + addout " " |
| 185 | +else |
| 186 | + addout "X" |
| 187 | + echo " * auxiliary taint, defined for and used by distros (#16)" |
| 188 | + |
| 189 | +fi |
| 190 | +T=`expr $T / 2` |
| 191 | +if [ `expr $T % 2` -eq 0 ]; then |
| 192 | + addout " " |
| 193 | +else |
| 194 | + addout "T" |
| 195 | + echo " * kernel was built with the struct randomization plugin (#17)" |
| 196 | +fi |
| 197 | + |
| 198 | +echo "For a more detailed explanation of the various taint flags see" |
| 199 | +echo " Documentation/admin-guide/tainted-kernels.rst in the the Linux kernel sources" |
| 200 | +echo " or https://kernel.org/doc/html/latest/admin-guide/tainted-kernels.html" |
| 201 | +echo "Raw taint value as int/string: $taint/'$out'" |
| 202 | +#EOF# |
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