1 #!/bin/sh 2 # 3 # Copyright (c) 2017 Fujitsu Ltd. 4 # Ported: Guangwen Feng <fenggw-fnst (at] cn.fujitsu.com> 5 # 6 # This program is free software; you can redistribute it and/or modify 7 # it under the terms of the GNU General Public License as published by 8 # the Free Software Foundation; either version 2 of the License, or 9 # (at your option) any later version. 10 # 11 # This program is distributed in the hope that it would be useful, 12 # but WITHOUT ANY WARRANTY; without even the implied warranty of 13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 # GNU General Public License for more details. 15 # 16 # You should have received a copy of the GNU General Public License 17 # along with this program, if not, see <http://www.gnu.org/licenses/>. 18 # 19 # This is a regression test about potential uninitialized variable, 20 # the test can crash the buggy kernel, and the bug has been fixed in: 21 # 22 # commit 38327424b40bcebe2de92d07312c89360ac9229a 23 # Author: Dan Carpenter <dan.carpenter (at] oracle.com> 24 # Date: Thu Jun 16 15:48:57 2016 +0100 25 # 26 # KEYS: potential uninitialized variable 27 # 28 29 TST_ID="keyctl01" 30 TST_SETUP=setup 31 TST_CLEANUP=cleanup 32 TST_TESTFUNC=do_test 33 TST_NEEDS_ROOT=1 34 TST_NEEDS_TMPDIR=1 35 TST_NEEDS_CMDS="keyctl" 36 . tst_test.sh 37 38 setup() 39 { 40 if tst_kvcmp -le 2.6.33; then 41 tst_brk TCONF "Kernel newer than 2.6.33 is needed" 42 fi 43 44 PATH_KEYSTAT="/proc/key-users" 45 PATH_KEYQUOTA="/proc/sys/kernel/keys/root_maxbytes" 46 47 if [ ! -f "$PATH_KEYSTAT" ] || [ ! -f "$PATH_KEYQUOTA" ]; then 48 tst_brk TCONF "'${PATH_KEYSTAT}' or '${PATH_KEYQUOTA}' \ 49 does not exist" 50 fi 51 52 ORIG_KEYSZ=`awk -F' +|/' '/ 0:/ {print $8}' $PATH_KEYSTAT` 53 ORIG_MAXKEYSZ=`cat $PATH_KEYQUOTA` 54 } 55 56 cleanup() 57 { 58 if [ -n "$ORIG_MAXKEYSZ" ]; then 59 echo $ORIG_MAXKEYSZ >$PATH_KEYQUOTA 60 fi 61 } 62 63 do_test() 64 { 65 local maxkeysz=$((ORIG_KEYSZ + 100)) 66 67 while true 68 do 69 echo $maxkeysz >$PATH_KEYQUOTA 70 71 keyctl request2 user debug:fred negate @t >temp 2>&1 72 grep -q -E "quota exceeded" temp 73 if [ $? -eq 0 ]; then 74 break 75 fi 76 77 local key=`keyctl show | awk '/debug:fred/ {print $1}'` 78 if [ -n "$key" ]; then 79 keyctl unlink $key @s >/dev/null 80 tst_sleep 50ms 81 fi 82 83 ((maxkeysz -= 4)) 84 done 85 86 tst_res TPASS "Bug not reproduced" 87 } 88 89 tst_run 90
