kernel-source/check-module-license

#!/bin/sh

rc=0
for file in $(find "$@" -name '*.ko' -o -name '*.ko.xz'); do
    l=$(/sbin/modinfo -F license "$file")
    if [ -z "$l" ]; then
	echo "ERROR: No license is included for module ${file##*/lib/modules/}"
	rc=1
    fi
done

exit $rc