[LTP] [PATCH v2] commands/keyctl01: Add new regression test

[Guangwen Feng]

Fixed by:
commit 38327424b40bcebe2de92d07312c89360ac9229a
Author: Dan Carpenter <dan.carpenter@oracle.com>
Date:   Thu Jun 16 15:48:57 2016 +0100

    KEYS: potential uninitialized variable

Signed-off-by: Guangwen Feng <fenggw-fnst@cn.fujitsu.com>
---
 runtest/commands                      |  1 +
 testcases/commands/keyctl/Makefile    | 24 ++++++++++
 testcases/commands/keyctl/keyctl01.sh | 89 +++++++++++++++++++++++++++++++++++
 3 files changed, 114 insertions(+)
 create mode 100644 testcases/commands/keyctl/Makefile
 create mode 100644 testcases/commands/keyctl/keyctl01.sh

diff --git a/runtest/commands b/runtest/commands
index fd51703..682deda 100644
--- a/runtest/commands
+++ b/runtest/commands
@@ -41,3 +41,4 @@ which01 which01.sh
 lsmod01 lsmod01.sh
 insmod01 insmod01.sh
 wc01 wc01.sh
+keyctl01 keyctl01.sh
diff --git a/testcases/commands/keyctl/Makefile b/testcases/commands/keyctl/Makefile
new file mode 100644
index 0000000..144beed
--- /dev/null
+++ b/testcases/commands/keyctl/Makefile
@@ -0,0 +1,24 @@
+#
+#    commands/keyctl testcases Makefile.
+#
+#    Copyright (c) 2017 Fujitsu Ltd.
+#    Author:Guangwen Feng <fenggw-fnst@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.
+#
+
+top_srcdir		?= ../../..
+
+include $(top_srcdir)/include/mk/env_pre.mk
+
+INSTALL_TARGETS		:= keyctl01.sh
+
+include $(top_srcdir)/include/mk/generic_leaf_target.mk
diff --git a/testcases/commands/keyctl/keyctl01.sh b/testcases/commands/keyctl/keyctl01.sh
new file mode 100644
index 0000000..076a130
--- /dev/null
+++ b/testcases/commands/keyctl/keyctl01.sh
@@ -0,0 +1,89 @@
+#!/bin/sh
+#
+# Copyright (c) 2017 Fujitsu Ltd.
+# Ported: Guangwen Feng <fenggw-fnst@cn.fujitsu.com>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program, if not, see <http://www.gnu.org/licenses/>.
+#
+# This is a regression test about potential uninitialized variable,
+# the test can crash the buggy kernel, and the bug has been fixed in:
+#
+#   commit 38327424b40bcebe2de92d07312c89360ac9229a
+#   Author: Dan Carpenter <dan.carpenter@oracle.com>
+#   Date:   Thu Jun 16 15:48:57 2016 +0100
+#
+#   KEYS: potential uninitialized variable
+#
+
+TST_ID="keyctl01"
+TST_SETUP=setup
+TST_CLEANUP=cleanup
+TST_TESTFUNC=do_test
+TST_NEEDS_ROOT=1
+TST_NEEDS_TMPDIR=1
+TST_NEEDS_CMDS="keyctl"
+. tst_test.sh
+
+setup()
+{
+	if tst_kvcmp -le 2.6.33; then
+		tst_brk TCONF "Kernel newer than 2.6.33 is needed"
+	fi
+
+	PATH_KEYSTAT="/proc/key-users"
+	PATH_KEYQUOTA="/proc/sys/kernel/keys/root_maxbytes"
+
+	if [ ! -f "$PATH_KEYSTAT" ] || [ ! -f "$PATH_KEYQUOTA" ]; then
+		tst_brk TCONF "'${PATH_KEYSTAT}' or '${PATH_KEYQUOTA}' \
+			does not exist"
+	fi
+
+	ORIG_KEYSZ=`awk -F' +|/' '/ 0:/ {print $8}' $PATH_KEYSTAT`
+	ORIG_MAXKEYSZ=`cat $PATH_KEYQUOTA`
+}
+
+cleanup()
+{
+	if [ -n "$ORIG_MAXKEYSZ" ]; then
+		echo $ORIG_MAXKEYSZ >$PATH_KEYQUOTA
+	fi
+}
+
+do_test()
+{
+	local maxkeysz=$((ORIG_KEYSZ + 100))
+
+	while true
+	do
+		echo $maxkeysz >$PATH_KEYQUOTA
+
+		keyctl request2 user debug:fred negate @t >temp 2>&1
+		grep -q -E "quota exceeded" temp
+		if [ $? -eq 0 ]; then
+			break
+		fi
+
+		local key=`keyctl show | awk '/debug:fred/ {print $1}'`
+		if [ -n "$key" ]; then
+			keyctl unlink $key @s >/dev/null
+			tst_sleep 50ms
+		fi
+
+		((maxkeysz -= 4))
+	done
+
+	tst_res TPASS "Bug not reproduced"
+}
+
+tst_run
-- 
1.8.4.2