[PATCH 3/4] selftests: ntsync: add wait argument validation tests

["Iván Ezequiel Rodriguez" <ivanrwcm25@gmail.com>]

Add coverage for documented EINVAL cases: zero owner on wait any/all,
non-zero pad, and objects from a different /dev/ntsync instance.

Signed-off-by: Iván Ezequiel Rodriguez <ivanrwcm25@gmail.com>
---
 .../testing/selftests/drivers/ntsync/ntsync.c | 44 +++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/tools/testing/selftests/drivers/ntsync/ntsync.c b/tools/testing/selftests/drivers/ntsync/ntsync.c
index 12b4b81edf7f..c9fe4d5987ec 100644
--- a/tools/testing/selftests/drivers/ntsync/ntsync.c
+++ b/tools/testing/selftests/drivers/ntsync/ntsync.c
@@ -1340,4 +1340,48 @@ TEST(stress_wait)
 	close(stress_device);
 }
 
+TEST(wait_args_validation)
+{
+	struct ntsync_sem_args sem_args = { .count = 1, .max = 1 };
+	struct ntsync_wait_args wait_args = {0};
+	struct timespec timeout;
+	int fd, fd2, sem, ret;
+	__u32 index;
+
+	fd = open("/dev/ntsync", O_CLOEXEC | O_RDONLY);
+	ASSERT_GE(fd, 0);
+
+	fd2 = open("/dev/ntsync", O_CLOEXEC | O_RDONLY);
+	ASSERT_GE(fd2, 0);
+
+	sem = ioctl(fd, NTSYNC_IOC_CREATE_SEM, &sem_args);
+	EXPECT_GE(sem, 0);
+
+	ret = wait_any(fd, 1, &sem, 0, &index);
+	EXPECT_EQ(-1, ret);
+	EXPECT_EQ(EINVAL, errno);
+
+	ret = wait_all(fd, 1, &sem, 0, &index);
+	EXPECT_EQ(-1, ret);
+	EXPECT_EQ(EINVAL, errno);
+
+	clock_gettime(CLOCK_MONOTONIC, &timeout);
+	wait_args.timeout = timeout.tv_sec * 1000000000ULL + timeout.tv_nsec;
+	wait_args.count = 0;
+	wait_args.objs = 0;
+	wait_args.owner = 123;
+	wait_args.pad = 1;
+	ret = ioctl(fd, NTSYNC_IOC_WAIT_ANY, &wait_args);
+	EXPECT_EQ(-1, ret);
+	EXPECT_EQ(EINVAL, errno);
+
+	ret = wait_any(fd2, 1, &sem, 123, &index);
+	EXPECT_EQ(-1, ret);
+	EXPECT_EQ(EINVAL, errno);
+
+	close(sem);
+	close(fd2);
+	close(fd);
+}
+
 TEST_HARNESS_MAIN
-- 
2.43.0