diff --git a/sys/kern/genoffset.sh b/sys/kern/genoffset.sh
index f7185e7ae396..aedccfd84c6e 100644
--- a/sys/kern/genoffset.sh
+++ b/sys/kern/genoffset.sh
@@ -1,100 +1,100 @@
 #!/bin/sh
 
 # SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 #
 # Copyright (c) 2000, Bruce Evans <bde@freebsd.org>
 # Copyright (c) 2018, Jeff Roberson <jeff@freebsd.org>
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
 # are met:
 # 1. Redistributions of source code must retain the above copyright
 #    notice, this list of conditions and the following disclaimer.
 # 2. Redistributions in binary form must reproduce the above copyright
 #    notice, this list of conditions and the following disclaimer in the
 #    documentation and/or other materials provided with the distribution.
 #
 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 # ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 # SUCH DAMAGE.
 #
 # $FreeBSD$
 
 usage()
 {
 	echo "usage: genoffset [-o outfile] objfile"
 	exit 1
 }
 
 work()
 (
     local last off x1 x2 x3 struct field type lastoff lasttype
 
     echo "#ifndef _OFFSET_INC_"
     echo "#define _OFFSET_INC_"
     echo "#if !defined(GENOFFSET) && (!defined(KLD_MODULE) || defined(KLD_TIED))"
     last=
-    temp=$(mktemp -d genoffset.XXXXX)
+    temp=$(mktemp -d genoffset.XXXXXXXXXX)
     trap "rm -rf ${temp}" EXIT
     # Note: we need to print symbol values in decimal so the numeric sort works
     ${NM:='nm'} ${NMFLAGS} -t d "$1" | grep __assym_offset__ | sed -e 's/__/ /g' | sort -k 4 -k 1 -n |
     while read off x1 x2 struct field type x3; do
 	off=$(echo "$off" | sed -E 's/^0+//')
 	if [ "$last" != "$struct" ]; then
 	    if [ -n "$last" ]; then
 		echo "};"
 	    fi
 	    echo "struct ${struct}_lite {"
 	    last=$struct
 	    printf "%b" "\tu_char\tpad_${field}[${off}];\n"
 	else
 	    printf "%b" "\tu_char\tpad_${field}[${off} - (${lastoff} + sizeof(${lasttype}))];\n"
 	fi
 	printf "%b" "\t${type}\t${field};\n"
 	lastoff="$off"
 	lasttype="$type"
 	echo "_SA(${struct}, ${field}, ${off});" >> "$temp/asserts"
     done
     echo "};"
     echo "#define _SA(s,f,o) _Static_assert(__builtin_offsetof(struct s ## _lite, f) == o, \\"
     printf '\t"struct "#s"_lite field "#f" not at offset "#o)\n'
     cat "$temp/asserts"
     echo "#undef _SA"
     echo "#endif"
     echo "#endif"
 )
 
 
 #
 #MAIN PROGGRAM
 #
 use_outfile="no"
 while getopts "o:" option
 do
 	case "$option" in
 	o)	outfile="$OPTARG"
 		use_outfile="yes";;
 	*)	usage;;
 	esac
 done
 shift $((OPTIND - 1))
 case $# in
 1)	;;
 *)	usage;;
 esac
 
 if [ "$use_outfile" = "yes" ]
 then
 	work "$1"  3>"$outfile" >&3 3>&-
 else
 	work "$1"
 fi