Commit 08e8f1ef authored by Randy Dunlap's avatar Randy Dunlap Committed by Andrew Morton
Browse files

kernel-chktaint: add reporting for tainted modules 

Check all loaded modules and report any that have their 'taint'
flags set.  The tainted module output format is:
 * <module_name> (<taint_flags>)

Example output:

Kernel is "tainted" for the following reasons:
 * externally-built ('out-of-tree') module was loaded  (#12)
 * unsigned module was loaded (#13)
Raw taint value as int/string: 12288/'G           OE      '

Tainted modules:
 * dump_test (OE)

Link: https://lkml.kernel.org/r/20260115064756.531592-1-rdunlap@infradead.org


Signed-off-by: default avatarRandy Dunlap <rdunlap@infradead.org>
Acked-by: default avatarThorsten Leemhuis <linux@leemhuis.info>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 89802ca3

tools/debugging/kernel-chktaint

+17 −1
Original line number Diff line number Diff line
@@ -211,9 +211,25 @@ else 
	addout "J"

	echo " * fwctl's mutating debug interface was used (#19)"

fi

echo "Raw taint value as int/string: $taint/'$out'"



# report on any tainted loadable modules

[ "$1" = "" ] && [ -r /sys/module/ ] && \

	cnt=`grep [A-Z] /sys/module/*/taint | wc -l` || cnt=0



if [ $cnt -ne 0 ]; then

	echo

	echo "Tainted modules:"

	for dir in `ls /sys/module` ; do

		if [ -r /sys/module/$dir/taint ]; then

			modtnt=`cat /sys/module/$dir/taint`

			[ "$modtnt" = "" ] || echo " * $dir ($modtnt)"

		fi

	done

fi



echo

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#