test_sysctl: add simple proc_dointvec() case
Test against a simple proc_dointvec() case. While at it, add a test
against INT_MAX. Make sure INT_MAX works, and INT_MAX+1 will fail.
Also test negative values work.
Link: http://lkml.kernel.org/r/20170630224431.17374-5-mcgrof@kernel.org
Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/tools/testing/selftests/sysctl/sysctl.sh b/tools/testing/selftests/sysctl/sysctl.sh
index 6ec8075..7ba3fa2 100644
--- a/tools/testing/selftests/sysctl/sysctl.sh
+++ b/tools/testing/selftests/sysctl/sysctl.sh
@@ -31,6 +31,7 @@
# we have tons of space.
ALL_TESTS="0001:1:1"
ALL_TESTS="$ALL_TESTS 0002:1:1"
+ALL_TESTS="$ALL_TESTS 0003:1:1"
test_modprobe()
{
@@ -82,6 +83,9 @@
if [ -z $MAX_DIGITS ]; then
MAX_DIGITS=$(($PAGE_SIZE/8))
fi
+ if [ -z $INT_MAX ]; then
+ INT_MAX=$(getconf INT_MAX)
+ fi
}
test_reqs()
@@ -122,6 +126,9 @@
int_0001)
VAL="60"
;;
+ int_0002)
+ VAL="1"
+ ;;
string_0001)
VAL="(none)"
;;
@@ -296,6 +303,48 @@
test_rc
}
+# You are using an int
+run_limit_digit_int()
+{
+ echo -n "Testing INT_MAX works ..."
+ reset_vals
+ TEST_STR="$INT_MAX"
+ echo -n $TEST_STR > $TARGET
+
+ if ! verify "${TARGET}"; then
+ echo "FAIL" >&2
+ rc=1
+ else
+ echo "ok"
+ fi
+ test_rc
+
+ echo -n "Testing INT_MAX + 1 will fail as expected..."
+ reset_vals
+ let TEST_STR=$INT_MAX+1
+ echo -n $TEST_STR > $TARGET 2> /dev/null
+
+ if verify "${TARGET}"; then
+ echo "FAIL" >&2
+ rc=1
+ else
+ echo "ok"
+ fi
+ test_rc
+
+ echo -n "Testing negative values will work as expected..."
+ reset_vals
+ TEST_STR="-3"
+ echo -n $TEST_STR > $TARGET 2> /dev/null
+ if ! verify "${TARGET}"; then
+ echo "FAIL" >&2
+ rc=1
+ else
+ echo "ok"
+ fi
+ test_rc
+}
+
run_stringtests()
{
echo -n "Writing entire sysctl in short writes ... "
@@ -389,6 +438,18 @@
run_stringtests
}
+sysctl_test_0003()
+{
+ TARGET="${SYSCTL}/int_0002"
+ reset_vals
+ ORIG=$(cat "${TARGET}")
+ TEST_STR=$(( $ORIG + 1 ))
+
+ run_numerictests
+ run_limit_digit
+ run_limit_digit_int
+}
+
list_tests()
{
echo "Test ID list:"
@@ -399,6 +460,7 @@
echo
echo "0001 x $(get_test_count 0001) - tests proc_dointvec_minmax()"
echo "0002 x $(get_test_count 0002) - tests proc_dostring()"
+ echo "0003 x $(get_test_count 0003) - tests proc_dointvec()"
}
test_reqs