[LTP] [PATCH v2] syscalls/timer_settime03.c: Add kconfig requirement of CONFIG_HIGH_RES_TIMERS=y

[Zhao Gongyi]

Test will fail when CONFIG_HIGH_RES_TIMERS is not set to y, because the return
value of timer_getoverrun is equal to expiry_time_values/interval. When
CONFIG_HIGH_RES_TIMERS is set to y, interval is equal to 1 nsec.When
CONFIG_HIGH_RES_TIMERS is not set to y, interval is equal to HZ*1000000 nsec,
and the return value of timer_getoverrun will not be greater than or equal to
{DELAYTIMER_MAX} in this testcase.
See https://nvd.nist.gov/vuln/detail/CVE-2018-12896.

Signed-off-by: Zhao Gongyi <zhaogongyi@huawei.com>
---
v2->v1: Add needs_kconfigs replace comment info.
 testcases/kernel/syscalls/timer_settime/timer_settime03.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/testcases/kernel/syscalls/timer_settime/timer_settime03.c b/testcases/kernel/syscalls/timer_settime/timer_settime03.c
index 4cc1f8bd8..4597bf74e 100644
--- a/testcases/kernel/syscalls/timer_settime/timer_settime03.c
+++ b/testcases/kernel/syscalls/timer_settime/timer_settime03.c
@@ -115,6 +115,10 @@ static struct tst_test test = {
 	.test_all = run,
 	.setup = setup,
 	.cleanup = cleanup,
+	.needs_kconfigs = (const char *[]) {
+		"CONFIG_HIGH_RES_TIMERS=y",
+		NULL
+	},
 	.tags = (const struct tst_tag[]) {
 		{"linux-git", "78c9c4dfbf8c"},
 		{"CVE", "2018-12896"},
--
2.17.1