@@ -44,3 +44,4 @@ wc01 wc01.sh
keyctl01 keyctl01.sh
gdb01 gdb01.sh
unshare01 unshare01.sh
+sysctl01 sysctl01.sh
new file mode 100644
@@ -0,0 +1,25 @@
+#
+# Copyright (c) 2018 FUJITSU LIMITED. All rights reserved.
+# Author: Xiao Yang <yangx.jy@cn.fujitsu.com>
+#
+# 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 <http://www.gnu.org/licenses/>.
+#
+
+top_srcdir ?= ../../..
+
+include $(top_srcdir)/include/mk/env_pre.mk
+
+INSTALL_TARGETS := *.sh
+
+include $(top_srcdir)/include/mk/generic_leaf_target.mk
new file mode 100755
@@ -0,0 +1,55 @@
+#!/bin/sh
+
+# Copyright (c) 2018 FUJITSU LIMITED. All rights reserved.
+# Author: Xiao Yang <yangx.jy@cn.fujitsu.com>
+#
+# This program is free software; you can redistribute it and#or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+# for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, see <http://www.gnu.org/licenses/>.
+#
+# Description:
+# This is a regression test for invalid value of sysctl_sched_time_avg.
+# System will hang if user set sysctl_sched_time_avg to 0 on buggy kernel.
+#
+# The kernel bug has been fixed in kernel:
+# '5ccba44ba118("sched/sysctl: Check user input value of sysctl_sched_time_avg")'
+
+TST_TESTFUNC=sysctl_test
+TST_NEEDS_ROOT=1
+TST_NEEDS_CMDS="sysctl"
+
+. tst_test.sh
+
+sysctl_test()
+{
+ # With commit d00535d, sched_time_avg was renamed as sched_time_avg_ms
+ local dir="/proc/sys/kernel/"
+ [ -e "$dir""sched_time_avg_ms" ] && local name="sched_time_avg_ms"
+ [ -e "$dir""sched_time_avg" ] && local name="sched_time_avg"
+ [ -z "$name" ] && tst_brk TCONF \
+ "sched_time_avg(_ms) was not supported"
+
+ local orig_value=$(cat "$dir""$name")
+
+ sysctl -w "kernel.""$name"=0 >/dev/null 2>&1
+
+ local test_value=$(cat "$dir""$name")
+
+ if [ ${test_value} -eq ${orig_value} ]; then
+ tst_res TPASS "Setting $name failed"
+ else
+ tst_res TFAIL "Setting $name succeeded"
+ sysctl -w "kernel.""$name"=${orig_value} >/dev/null 2>&1
+ fi
+}
+
+tst_run
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 <yangx.jy@cn.fujitsu.com> --- runtest/commands | 1 + testcases/commands/sysctl/Makefile | 25 ++++++++++++++++ testcases/commands/sysctl/sysctl01.sh | 55 +++++++++++++++++++++++++++++++++++ 3 files changed, 81 insertions(+) create mode 100644 testcases/commands/sysctl/Makefile create mode 100755 testcases/commands/sysctl/sysctl01.sh