1 #! /bin/sh 1 #! /bin/sh
2 # SPDX-License-Identifier: GPL-2.0 2 # SPDX-License-Identifier: GPL-2.0
3 # 3 #
4 # Randy Dunlap <rdunlap@infradead.org>, 2018 4 # Randy Dunlap <rdunlap@infradead.org>, 2018
5 # Thorsten Leemhuis <linux@leemhuis.info>, 2018 5 # Thorsten Leemhuis <linux@leemhuis.info>, 2018
6 6
7 usage() 7 usage()
8 { 8 {
9 cat <<EOF 9 cat <<EOF
10 usage: ${0##*/} 10 usage: ${0##*/}
11 ${0##*/} <int> 11 ${0##*/} <int>
12 12
13 Call without parameters to decode /proc/sys/ke 13 Call without parameters to decode /proc/sys/kernel/tainted.
14 14
15 Call with a positive integer as parameter to d 15 Call with a positive integer as parameter to decode a value you
16 retrieved from /proc/sys/kernel/tainted on ano 16 retrieved from /proc/sys/kernel/tainted on another system.
17 17
18 EOF 18 EOF
19 } 19 }
20 20
21 if [ "$1"x != "x" ]; then 21 if [ "$1"x != "x" ]; then
22 if [ "$1"x == "--helpx" ] || [ "$1"x 22 if [ "$1"x == "--helpx" ] || [ "$1"x == "-hx" ] ; then
23 usage 23 usage
24 exit 1 24 exit 1
25 elif [ $1 -ge 0 ] 2>/dev/null ; then 25 elif [ $1 -ge 0 ] 2>/dev/null ; then
26 taint=$1 26 taint=$1
27 else 27 else
28 echo "Error: Parameter '$1' no 28 echo "Error: Parameter '$1' not a positive integer. Aborting." >&2
29 exit 1 29 exit 1
30 fi 30 fi
31 else 31 else
32 TAINTFILE="/proc/sys/kernel/tainted" 32 TAINTFILE="/proc/sys/kernel/tainted"
33 if [ ! -r $TAINTFILE ]; then 33 if [ ! -r $TAINTFILE ]; then
34 echo "No file: $TAINTFILE" 34 echo "No file: $TAINTFILE"
35 exit 35 exit
36 fi 36 fi
37 37
38 taint=`cat $TAINTFILE` 38 taint=`cat $TAINTFILE`
39 fi 39 fi
40 40
41 if [ $taint -eq 0 ]; then 41 if [ $taint -eq 0 ]; then
42 echo "Kernel not Tainted" 42 echo "Kernel not Tainted"
43 exit 43 exit
44 else 44 else
45 echo "Kernel is \"tainted\" for the fo 45 echo "Kernel is \"tainted\" for the following reasons:"
46 fi 46 fi
47 47
48 T=$taint 48 T=$taint
49 out= 49 out=
50 50
51 addout() { 51 addout() {
52 out=$out$1 52 out=$out$1
53 } 53 }
54 54
55 if [ `expr $T % 2` -eq 0 ]; then 55 if [ `expr $T % 2` -eq 0 ]; then
56 addout "G" 56 addout "G"
57 else 57 else
58 addout "P" 58 addout "P"
59 echo " * proprietary module was loaded 59 echo " * proprietary module was loaded (#0)"
60 fi 60 fi
61 61
62 T=`expr $T / 2` 62 T=`expr $T / 2`
63 if [ `expr $T % 2` -eq 0 ]; then 63 if [ `expr $T % 2` -eq 0 ]; then
64 addout " " 64 addout " "
65 else 65 else
66 addout "F" 66 addout "F"
67 echo " * module was force loaded (#1)" 67 echo " * module was force loaded (#1)"
68 fi 68 fi
69 69
70 T=`expr $T / 2` 70 T=`expr $T / 2`
71 if [ `expr $T % 2` -eq 0 ]; then 71 if [ `expr $T % 2` -eq 0 ]; then
72 addout " " 72 addout " "
73 else 73 else
74 addout "S" 74 addout "S"
75 echo " * kernel running on an out of s 75 echo " * kernel running on an out of specification system (#2)"
76 fi 76 fi
77 77
78 T=`expr $T / 2` 78 T=`expr $T / 2`
79 if [ `expr $T % 2` -eq 0 ]; then 79 if [ `expr $T % 2` -eq 0 ]; then
80 addout " " 80 addout " "
81 else 81 else
82 addout "R" 82 addout "R"
83 echo " * module was force unloaded (#3 83 echo " * module was force unloaded (#3)"
84 fi 84 fi
85 85
86 T=`expr $T / 2` 86 T=`expr $T / 2`
87 if [ `expr $T % 2` -eq 0 ]; then 87 if [ `expr $T % 2` -eq 0 ]; then
88 addout " " 88 addout " "
89 else 89 else
90 addout "M" 90 addout "M"
91 echo " * processor reported a Machine 91 echo " * processor reported a Machine Check Exception (MCE) (#4)"
92 fi 92 fi
93 93
94 T=`expr $T / 2` 94 T=`expr $T / 2`
95 if [ `expr $T % 2` -eq 0 ]; then 95 if [ `expr $T % 2` -eq 0 ]; then
96 addout " " 96 addout " "
97 else 97 else
98 addout "B" 98 addout "B"
99 echo " * bad page referenced or some u 99 echo " * bad page referenced or some unexpected page flags (#5)"
100 fi 100 fi
101 101
102 T=`expr $T / 2` 102 T=`expr $T / 2`
103 if [ `expr $T % 2` -eq 0 ]; then 103 if [ `expr $T % 2` -eq 0 ]; then
104 addout " " 104 addout " "
105 else 105 else
106 addout "U" 106 addout "U"
107 echo " * taint requested by userspace 107 echo " * taint requested by userspace application (#6)"
108 fi 108 fi
109 109
110 T=`expr $T / 2` 110 T=`expr $T / 2`
111 if [ `expr $T % 2` -eq 0 ]; then 111 if [ `expr $T % 2` -eq 0 ]; then
112 addout " " 112 addout " "
113 else 113 else
114 addout "D" 114 addout "D"
115 echo " * kernel died recently, i.e. th 115 echo " * kernel died recently, i.e. there was an OOPS or BUG (#7)"
116 fi 116 fi
117 117
118 T=`expr $T / 2` 118 T=`expr $T / 2`
119 if [ `expr $T % 2` -eq 0 ]; then 119 if [ `expr $T % 2` -eq 0 ]; then
120 addout " " 120 addout " "
121 else 121 else
122 addout "A" 122 addout "A"
123 echo " * an ACPI table was overridden 123 echo " * an ACPI table was overridden by user (#8)"
124 fi 124 fi
125 125
126 T=`expr $T / 2` 126 T=`expr $T / 2`
127 if [ `expr $T % 2` -eq 0 ]; then 127 if [ `expr $T % 2` -eq 0 ]; then
128 addout " " 128 addout " "
129 else 129 else
130 addout "W" 130 addout "W"
131 echo " * kernel issued warning (#9)" 131 echo " * kernel issued warning (#9)"
132 fi 132 fi
133 133
134 T=`expr $T / 2` 134 T=`expr $T / 2`
135 if [ `expr $T % 2` -eq 0 ]; then 135 if [ `expr $T % 2` -eq 0 ]; then
136 addout " " 136 addout " "
137 else 137 else
138 addout "C" 138 addout "C"
139 echo " * staging driver was loaded (#1 139 echo " * staging driver was loaded (#10)"
140 fi 140 fi
141 141
142 T=`expr $T / 2` 142 T=`expr $T / 2`
143 if [ `expr $T % 2` -eq 0 ]; then 143 if [ `expr $T % 2` -eq 0 ]; then
144 addout " " 144 addout " "
145 else 145 else
146 addout "I" 146 addout "I"
147 echo " * workaround for bug in platfor 147 echo " * workaround for bug in platform firmware applied (#11)"
148 fi 148 fi
149 149
150 T=`expr $T / 2` 150 T=`expr $T / 2`
151 if [ `expr $T % 2` -eq 0 ]; then 151 if [ `expr $T % 2` -eq 0 ]; then
152 addout " " 152 addout " "
153 else 153 else
154 addout "O" 154 addout "O"
155 echo " * externally-built ('out-of-tre 155 echo " * externally-built ('out-of-tree') module was loaded (#12)"
156 fi 156 fi
157 157
158 T=`expr $T / 2` 158 T=`expr $T / 2`
159 if [ `expr $T % 2` -eq 0 ]; then 159 if [ `expr $T % 2` -eq 0 ]; then
160 addout " " 160 addout " "
161 else 161 else
162 addout "E" 162 addout "E"
163 echo " * unsigned module was loaded (# 163 echo " * unsigned module was loaded (#13)"
164 fi 164 fi
165 165
166 T=`expr $T / 2` 166 T=`expr $T / 2`
167 if [ `expr $T % 2` -eq 0 ]; then 167 if [ `expr $T % 2` -eq 0 ]; then
168 addout " " 168 addout " "
169 else 169 else
170 addout "L" 170 addout "L"
171 echo " * soft lockup occurred (#14)" 171 echo " * soft lockup occurred (#14)"
172 fi 172 fi
173 173
174 T=`expr $T / 2` 174 T=`expr $T / 2`
175 if [ `expr $T % 2` -eq 0 ]; then 175 if [ `expr $T % 2` -eq 0 ]; then
176 addout " " 176 addout " "
177 else 177 else
178 addout "K" 178 addout "K"
179 echo " * kernel has been live patched 179 echo " * kernel has been live patched (#15)"
180 fi 180 fi
181 181
182 T=`expr $T / 2` 182 T=`expr $T / 2`
183 if [ `expr $T % 2` -eq 0 ]; then 183 if [ `expr $T % 2` -eq 0 ]; then
184 addout " " 184 addout " "
185 else 185 else
186 addout "X" 186 addout "X"
187 echo " * auxiliary taint, defined for 187 echo " * auxiliary taint, defined for and used by distros (#16)"
188 188
189 fi 189 fi
190 <<
191 T=`expr $T / 2` 190 T=`expr $T / 2`
192 if [ `expr $T % 2` -eq 0 ]; then 191 if [ `expr $T % 2` -eq 0 ]; then
193 addout " " 192 addout " "
194 else 193 else
195 addout "T" 194 addout "T"
196 echo " * kernel was built with the str 195 echo " * kernel was built with the struct randomization plugin (#17)"
197 fi <<
198 <<
199 T=`expr $T / 2` <<
200 if [ `expr $T % 2` -eq 0 ]; then <<
201 addout " " <<
202 else <<
203 addout "N" <<
204 echo " * an in-kernel test (such as a <<
205 fi 196 fi
206 197
207 echo "For a more detailed explanation of the v 198 echo "For a more detailed explanation of the various taint flags see"
208 echo " Documentation/admin-guide/tainted-kerne 199 echo " Documentation/admin-guide/tainted-kernels.rst in the Linux kernel sources"
209 echo " or https://kernel.org/doc/html/latest/a 200 echo " or https://kernel.org/doc/html/latest/admin-guide/tainted-kernels.html"
210 echo "Raw taint value as int/string: $taint/'$ 201 echo "Raw taint value as int/string: $taint/'$out'"
211 #EOF# 202 #EOF#
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