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test_sysctl: add simple proc_douintvec() case 

Test against a simple proc_douintvec() case.  While at it, add a test
against UINT_MAX.  Make sure UINT_MAX works, and UINT_MAX+1 will fail
and that negative values are not accepted.

Link: http://lkml.kernel.org/r/20170630224431.17374-6-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>
This commit is contained in:
Luis R. Rodriguez 2017-07-12 14:33:55 -07:00 committed by Linus Torvalds
parent eb965eda1c
commit 2920fad3a5
2 changed files with 74 additions and 0 deletions
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11
lib/test_sysctl.c
View File

@ -43,6 +43,8 @@ struct test_sysctl_data {
int int_0001;
int int_0002;
unsigned int uint_0001;
char string_0001[65];
};
@ -50,6 +52,8 @@ static struct test_sysctl_data test_data = {
.int_0001 = 60,
.int_0002 = 1,
.uint_0001 = 314,
.string_0001 = "(none)",
};
@ -71,6 +75,13 @@ static struct ctl_table test_table[] = {
.mode = 0644,
.proc_handler = proc_dointvec,
},
{
.procname = "uint_0001",
.data = &test_data.uint_0001,
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_douintvec,
},
{
.procname = "string_0001",
.data = &test_data.string_0001,

63
tools/testing/selftests/sysctl/sysctl.sh
View File

@ -32,6 +32,7 @@ TEST_FILE=$(mktemp)
ALL_TESTS="0001:1:1"
ALL_TESTS="$ALL_TESTS 0002:1:1"
ALL_TESTS="$ALL_TESTS 0003:1:1"
ALL_TESTS="$ALL_TESTS 0004:1:1"
test_modprobe()
{
@ -86,6 +87,9 @@ function check_production_sysctl_writes_strict()
if [ -z $INT_MAX ]; then
INT_MAX=$(getconf INT_MAX)
fi
if [ -z $UINT_MAX ]; then
UINT_MAX=$(getconf UINT_MAX)
fi
}
test_reqs()
@ -129,6 +133,9 @@ reset_vals()
int_0002)
VAL="1"
;;
uint_0001)
VAL="314"
;;
string_0001)
VAL="(none)"
;;
@ -345,6 +352,49 @@ run_limit_digit_int()
test_rc
}
# You are using an unsigned int
run_limit_digit_uint()
{
echo -n "Testing UINT_MAX works ..."
reset_vals
TEST_STR="$UINT_MAX"
echo -n $TEST_STR > $TARGET
if ! verify "${TARGET}"; then
echo "FAIL" >&2
rc=1
else
echo "ok"
fi
test_rc
echo -n "Testing UINT_MAX + 1 will fail as expected..."
reset_vals
TEST_STR=$(($UINT_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 not 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 ... "
@ -450,6 +500,18 @@ sysctl_test_0003()
run_limit_digit_int
}
sysctl_test_0004()
{
TARGET="${SYSCTL}/uint_0001"
reset_vals
ORIG=$(cat "${TARGET}")
TEST_STR=$(( $ORIG + 1 ))
run_numerictests
run_limit_digit
run_limit_digit_uint
}
list_tests()
{
echo "Test ID list:"
@ -461,6 +523,7 @@ list_tests()
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()"
echo "0004 x $(get_test_count 0004) - tests proc_douintvec()"
}
test_reqs