
Commit c272612cb4
("kunit: Taint the kernel when KUnit tests are run")
added a new taint flag for when in-kernel tests run. This commit adds
recognition of this new flag in kernel-chktaint.
With this change the correct reason will be reported if the kernel is
tainted because of a test run.
Amended Commit log: Shuah Khan <skhan@linuxfoundation.org>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Joe Fradley <joefradley@google.com>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
3.7 KiB
Executable File
#! /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##/}
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 integer. 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 " * kernel running on an out of specification system (#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
T=expr $T / 2
if [ expr $T % 2
-eq 0 ]; then
addout " "
else
addout "N"
echo " * an in-kernel test (such as a KUnit test) has been run (#18)"
fi
echo "For a more detailed explanation of the various taint flags see" echo " Documentation/admin-guide/tainted-kernels.rst in 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#