[LTP] [PATCH v2] futex_waitv01: Add test verifies EINVAL for invalid nr_futexes

[Zhao Gongyi]

Add test verifies EINVAL for invalid nr_futexes according to
https://www.kernel.org/doc/html/latest/userspace-api/futex2.html.

Signed-off-by: Zhao Gongyi <zhaogongyi@huawei.com>
---
v1->v2: Check also lower bound that suggested by Andrea Cervesato

 testcases/kernel/syscalls/futex/futex_waitv01.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/testcases/kernel/syscalls/futex/futex_waitv01.c b/testcases/kernel/syscalls/futex/futex_waitv01.c
index 601fee8df..721852750 100644
--- a/testcases/kernel/syscalls/futex/futex_waitv01.c
+++ b/testcases/kernel/syscalls/futex/futex_waitv01.c
@@ -98,6 +98,19 @@ static void test_invalid_clockid(void)
 		     "futex_waitv invalid clockid");
 }

+static void test_invalid_nr_futex(void)
+{
+	struct timespec to;
+	init_waitv();
+	init_timeout(&to);
+
+	/* Valid nr_futexes is [1, 128] */
+	TST_EXP_FAIL(futex_waitv(waitv, 129, 0, &to, CLOCK_REALTIME), EINVAL,
+		     "futex_waitv invalid nr_futexes");
+	TST_EXP_FAIL(futex_waitv(waitv, 0, 0, &to, CLOCK_REALTIME), EINVAL,
+		     "futex_waitv invalid nr_futexes");
+}
+
 static void run(void)
 {
 	test_invalid_flags();
@@ -105,6 +118,7 @@ static void run(void)
 	test_null_address();
 	test_null_waiters();
 	test_invalid_clockid();
+	test_invalid_nr_futex();
 }

 static struct tst_test test = {
--
2.17.1