From mboxrd@z Thu Jan 1 00:00:00 1970 From: Xiao Yang Date: Tue, 23 Jan 2018 16:17:32 +0800 Subject: [LTP] [PATCH] commands/sysctl: Add new regression test for invalid sched_time_avg Message-ID: <1516695452-23224-1-git-send-email-yangx.jy@cn.fujitsu.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ltp@lists.linux.it The kernel bug has been fixed in kernel: '5ccba44ba118("sched/sysctl: Check user input value of sysctl_sched_time_avg")' Signed-off-by: Xiao Yang --- runtest/commands | 1 + testcases/commands/sysctl/Makefile | 25 ++++++++++++++ testcases/commands/sysctl/sysctl01.sh | 65 +++++++++++++++++++++++++++++++++++ 3 files changed, 91 insertions(+) create mode 100644 testcases/commands/sysctl/Makefile create mode 100755 testcases/commands/sysctl/sysctl01.sh diff --git a/runtest/commands b/runtest/commands index 92df3af..fde8063 100644 --- a/runtest/commands +++ b/runtest/commands @@ -44,3 +44,4 @@ wc01 wc01.sh keyctl01 keyctl01.sh gdb01 gdb01.sh unshare01 unshare01.sh +sysctl01 sysctl01.sh diff --git a/testcases/commands/sysctl/Makefile b/testcases/commands/sysctl/Makefile new file mode 100644 index 0000000..61ff705 --- /dev/null +++ b/testcases/commands/sysctl/Makefile @@ -0,0 +1,25 @@ +# +# Copyright (c) 2018 FUJITSU LIMITED. All rights reserved. +# Author: Xiao Yang +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# General Public License for more details. +# +# You should have received a copy of the GNU General Public License along +# with this program; if not, see . +# + +top_srcdir ?= ../../.. + +include $(top_srcdir)/include/mk/env_pre.mk + +INSTALL_TARGETS := *.sh + +include $(top_srcdir)/include/mk/generic_leaf_target.mk diff --git a/testcases/commands/sysctl/sysctl01.sh b/testcases/commands/sysctl/sysctl01.sh new file mode 100755 index 0000000..2bcf9a7 --- /dev/null +++ b/testcases/commands/sysctl/sysctl01.sh @@ -0,0 +1,65 @@ +#!/bin/sh +# +# Copyright (c) 2018 FUJITSU LIMITED. All rights reserved. +# Author: Xiao Yang +# +# This program is free software; you can redistribute it and#or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY +# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +# for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, see . +# +# Description: +# This is a regression test for invalid value of sched_time_avg. +# System will hang if user set sched_time_avg to 0 on buggy kernel. +# +# The kernel bug has been fixed in kernel: +# '5ccba44ba118("sched/sysctl: Check user input value of sysctl_sched_time_avg")' + +TST_TESTFUNC=sysctl_test +TST_NEEDS_CMDS="sysctl" + +. tst_test.sh + +get_value() +{ + local value=$(sysctl -n $1) + [ -z "$value" ] && tst_brk TBROK \ + "Failed to get the value of sched_time_avg(_ms)" + + echo $value +} + +sysctl_test() +{ + # With commit d00535d, sched_time_avg was renamed as sched_time_avg_ms + local name=$(sysctl -a 2>&1 | egrep -o \ + 'kernel.(sched_time_avg|sched_time_avg_ms)') + [ -z "$name" ] && tst_brk TCONF \ + "sched_time_avg(_ms) was not supported" + + local orig_value=$(get_value $name) + + sysctl -w $name=0 >/dev/null 2>&1 + + # Increase the chance of exposing the problem on RHEL6 + sleep 3 + + local curr_value=$(get_value $name) + + if [ ${curr_value} -eq ${orig_value} ]; then + tst_res TPASS "Setting sched_time_avg(_ms) failed" + else + tst_res TFAIL "Setting sched_time_avg(_ms) succeeded" + sysctl -w $name=${orig_value} >/dev/null 2>&1 + fi +} + +tst_run -- 1.8.3.1